News

20/11/2017

Luis Santos (University of Hannover) visits us for three days at ICFO, during which we learn a lot about droplets and rotons in dipolar BECs.

14/11/2017

Giacomo Roati (LENS) visits us at ICFO and gives a great talk on Josephson oscillations, phase slips and ferromagnetic domains in strongly interacting Fermi gases. Thanks a lot for the visit, Giacomo!

30/10/2017

Our second experimental paper “Bright soliton to quantum droplet transition in a mixture of Bose-Einstein condensates” is finally in the arXiv! Check here if you want to understand the difference between composite bright solitons and quantum liquid droplets, and learn about analogies between droplets and high order optical solitons in non-linear media.

29/10/2017

Today is Philip’s last day in the QGE. Thanks a lot for all the contributions to the experiment that you did during your Master thesis! We wish you all the best for the future!

27/10/2017

Leticia is this week in Glasgow, attending the kick-off meeting of the DesOEQ project. There, she gives and invited talk on our latest droplet results. It is a very good occasion to learn more about the cool quantum gas research that is going on at Strathclyde, Cambridge and Oxford.

22/09/2017

Alberto finishes today his summer internship in the group, during which he developed a setup for optical manipulation of our droplets using a digital micro-mirror device. It was great having you in the QGE, Alberto! All the best for the future!

20/09/2017

Leticia is this week in Gdansk attending the Quantum Optics IX conference. There, she gives an invited talk on our recent and ongoing quantum droplet experiments. This is a very nice conference full of interesting presentations, posters and discussions. Thanks a lot to the organizers for the invitation!

08/08/2017

Thomas Bourdel (Institut d’Optique, Palaiseau) and Daniel Greif (Harvard University) visit us after the BEC conference. It is great to have them at ICFO and show them our potassium lab. In the afternoon, Daniel gives a talk where he presents their amazing single-site resolved studies of fermionic antiferromagnets. Thanks a lot to both of you for coming!

02/08/2017

BEC2017

 

Leticia is this week in the BEC 2017 conference in Sant Feliu de Guixols, where she gives an invited talk on our recent liquid droplet results. As usual, the conference is really really inspiring (but also a bit exhausting), with so many nice talks, posters and discussions.

 

28/08/2017

Droplets

Breaking news! Our first experimental paper, “Quantum liquid droplets in a mixture of Bose-Einstein condensates”, is finally on the arXiv! Check here if you want to learn more about ultradilute quantum liquids stabilized by quantum fluctuations in a system with only contact interactions!

In the evening, we have a farewell dinner with Luca, who leaves us today to start a new postdoc position at LENS/INO-CNR in Florence and Pisa. There, he will work on the new dysprosium lab. We really enjoyed a lot working with you during the last three years in the QGE, Luca, and will really miss you here! Of course, we wish you all the best for your new life in Florence and hope that you will be visiting us often in Barcelona!

10/08/2017

Group barbecue in Bruno’s terrace. Cool!
BBQAugust2017

09/08/2017

Celebrating Luca’s birthday in the new open-air space of ICFO’s cafeteria. Thanks a lot for the cake, Luca, and happy birthday again!
BirthdayLuca2017

26/07/2017

Igor Ferrier-Barbut (University of Stuttgart) visits us at ICFO for a couple of days and gives a great talk on their latest dysprosium droplet results. We have nice discussions on dipolar vs. mixture droplets, and get a much clearer understanding of the microscopic details of dysprosium droplets. It is really interesting to realize that, despite the very different interactions at play, both systems share so many features. Thanks for the visit, Igor!

17/07/2017

Julio is this week in the YAO (Young Atom Opticians) 2017 conference, which this year takes place in Paris. There, he gives a talk on… quantum liquid droplets! It is great to meet and discuss with people from all groups in Europe, and learn so many things. Thanks to the local organizers -including Manel- for putting together such a nice conference.

12/07/2017

César attends the annual ICE (Quantum Information and Quantum Technologies Spanish Network) meeting in Madrid and gives an invited droplet talk in the quantum simulation session. It is a nice occasion to meet other experimentalists in Spain, such as the quantum communications group in Madrid or the ion trappers of Granada. Thanks a lot to the Madrid QUINFOG group for the organization! We are already looking forward to the next meeting!

28/06/2017

Jean-François Clément (Université de Lille) visits us for a couple of days and gives a talk on their kicked rotor experiments. We also have quite some discussions and explain him our 39K-41K cooling strategy. Good luck with your potassium machine in Lille!

20/06/2017

Alberto Muñoz de las Heras joins the group as internship student, within the frame of ICFO’s summer fellows program. During the next three months he will work on the generation of dynamical potentials with a digital micromirror device, and develop a test setup for correcting the aberrations introduced by the DMD. Welcome to the QGE, Alberto!

02/06/2017

Leticia visits the group of T. Pfau at the University of Stuttgart, and gives a talk on our ongoing droplet experiments. It is really interesting to discuss with the Dy team the analogies and differences between dipolar and mixture droplets, and to learn about their fantastic results.

29/05/2017

Leticia is this week in Florence, attending in beautiful Arcetri the conference “Quantum science approaches to strongly correlated systems : from ultracold atoms to high-energy and condensed matter physics”, where she gives an invited talk on our latest results on quantum droplets.

12/05/2017

“Measuring Chern numbers in Hofstadter strips”, a joint proposal with our theory friends from ICFO’s third floor, is now on the arXiv!  Check here if you want to learn about Laughlin pump experiments with synthetic dimensions, and an intuitive way of understanding the Chern number.

20/04/2017

Luca and Leticia spend two days in Florence, attending the first meeting of the QUIC – Quantum insulators and conductors project, where Leticia presents an update of our ongoing droplet experiments. It is great to discuss with all the participants of the meeting and visit the ultracool ultracold LENS labs. We have particularly interesting exchanges with the potassium team on droplets, with Matteo Zaccanti on Efimov physics, and with the lithium lab on imaging. And, of course, it is a lot of fun to meet the Zurich and Florence friends again!

12/04/2017

Celebrating Leticia’s birthday in ICFO’s cafeteria. Thanks a lot for the cake!

03/04/2017

Bruno Naylor joins the group as a postdoc. Welcome, Bruno!

29/03/2017

Farewell lunch with Pierrick, who finishes this week his postdoc in the QGE. Thanks a lot for all your contributions to the experiment! We wish you all the best for your new research on inertial navigation with cold atoms!

23/02/2017

Group travel to Munich, to attend the kick-off meeting of the research group on artificial gauge fields and interacting topological phases on which we participate as associated member. There, Pierrick gives a talk on our latest experiments, and César, Julio, Luca and Philipp present a poster. Unfortunately, Leticia stays in Barcelona with a bad knee and cannot attend the cool talks, discussions and labtours.

10/02/2017

The complete group takes part in the 5th half-day meeting on cold atoms in the Barcelona region, which is this year organized by Bruno Juliá Díaz at the University of Barcelona. Luca gives a talk on our soliton and droplet measurements, and Julio presents a poster with all the experimental details. As always, it is great to learn on the progress of the different teams and discuss with Fabrice Gerbier (LKB), who is this year’s invited speaker.

16/01/2017

Pierrick visits LP2N at Institut d’Optique in Bordeaux, where he gives a talk on our recent liquid droplet experiments.

10/01/2017

Alessio Recati (Munich/Trento) visits us this week, and gives a talk on “Coherently coupled Bose gases”. We have many interesting discussions with him on RF coupled Bose gases, polarons and quantum simulations of gravity.

05/01/2017

“Many-body interferometry of magnetic polaron dynamics”, our theory proposal in collaboration with Y. Ashida, R. Schmidt and E. Demler, is now in the arXiv.

23/12/2016

“Synthetic Unruh effect in cold atoms”, our theory preprint in collaboration with J. Rodríguez-Laguna, M. Lewenstein and A. Celi, is accepted for publication in Phys. Rev A.

30/11/2016

“Proximity effects in cold atom artificial graphene”, our theory preprint in collaboration with T. Grass, R. Chhajlany, V. Pellegrini and M. Lewenstein, is accepted for publication in 2D materials. Cool!

24/11/2016

Bruno Naylor (Université Paris Nord) visits us for a couple of days and presents some of the experiments done during his PhD thesis, on the study of spin physics with chromium atoms.

18/11/2016

Philip and Luca do the first tests of our new green laser. It is really quite a bit of power…

17/11/2016

Julio and Pierrick assemble today our new 2D MOT chamber in lab 003.

27/10/2016

Our new 532 nm laser, which we will use for preparing low-dimensional quantum gases, arrives today!

25/10/2016

Julio succesfully defends today his Thesis Proposal in front of a committee formed by Thierry Lahaye (Institut d’Optique), Hugues de Riedmatten and Rob Sewell (ICFO). Well done, Julio!
We take advantage of Thierry’s visit for learning more about their bottom-up approach to quantum simulation using Rydberg atoms.

03/10/2016

Philip Thomas joins the group for his Master thesis within his physics studies at the University of Hamburg, and will work during the coming year on the design and construction of an optical lattice setup for our potassium experiment. Welcome to the QGE group, Philip!

30/09/2016

Iñigo finishes today his summer internship in our group, during which he worked on generating arbitrary potentials for our experiment using a digital micro-mirror device. It was great having you with us during the last three months. We wish you good luck for the future!

13/09/2016

Pierrick is this week in Newcastle attending the MACRO mini-conference, where he gives a talk on our measurements of the soliton-to-droplet crossover in attractive Bose-Bose mixtures.

07/09/2016

Julio is this week in Bonn, attending the Greenhorn meeting 2016 where he gives his very first scientific talk! For this occasion, he presents our experiments on interactions, solitons and droplets in potassium Bose-Bose mixtures.

31/08/2016

Luca is these days in beautiful Salerno, attending the BEC2016 conference. He also presents a poster on our latest results on the soliton-to-droplet crossover in attractive Bose-Bose mixtures.

30/08/2016

Vincent finishes today his Master 1 internship project, during which he set up a magnetometer exploiting Faraday rotation in a cell of potassium atoms. We hope you enjoyed your stay here as much as we did, and wish you all the best for the next steps!
FarewellVincentBrunaud

24/07/2016

Pierrick is this week in Seoul, attending ICAP 2016. Besides listening to fantastic talks, he also presents a poster on our initial results on the beyond-mean-field stabilization in attractive Bose-Bose mixtures.

11/07/2016

Eugene Demler (Harvard) visits us today, and gives a talk at ICFO on Bose and Fermi polarons. Discussing with Eugene is as always very inspiring.

27/06/2016

Iñigo Urtiaga joins the group as ICFO summer fellow, and will work on the generation of flexible trapping potentials for our BECs using a digital micro-mirror device. Welcome to the group, Iñigo!

21/06/2016

Today we get the first phase contrast images of 41K and 39K BECs taken with the new objective!

20/06/2016

Pierrick is this week in Paris, where he presents our work in the workshop Dynamics and Transport in Quantum Gases at the University of Cergy-Pontoise.

17/06/2016

QGE in El País! And it’s a great group picture, isn’t it?
QGEElPais

10/06/2016

First trials of dual gray molasses on the D1 transition, cooling simultaneously 41K and 39K.

05/06/2016

First in situ images with the new objective. It works!

30/05/2016

We install today our homemade objective on the machine. Thanks to Julio’s extensive preparation work, everything goes very smoothly. Next step: imaging!

19/05/2016

Today is the Spanish Royal Physical Society Award Ceremony, where Leticia receives the young experimental physics prize. One of the nicest things in the evening is certainly to meet again several of the first year UCM physics professors.

09/05/2016

César is this week in Bad Honnef, participating in the Quo Vadis BEC conference. Besides attending all the nice talks, he also presents our work on dual BECs and Feshbach spectroscopy in his poster.

14/04/2016

Luca is this week in Palma de Mallorca, where he presents our work on dual 41K and 39K BECs in the annual ICE conference (meeting of the quantum tecnologies and quantum information network in Spain).

22/03/2016

Celebrating Vincent’s arrival in the group’s favourite japanese restaurant.

21/03/2016

Vincent Brunaud joins the group to do his third year internhip from Ecole Polytechnique, and will develop a magnetometer using potassium atoms. Welcome to the group, Vincent!

17/03/2016

Pierrick and Cesar give an inventor crash course to other ICFOnians within the ICFO+ program.

29/02/2016

Pierrick is today in Toulouse, where he gives a talk presenting our experimental apparatus and future plans.

18/02/2016

We (finally!) see Rabi oscillations between different Zeeman sublevels of potassium.

05/02/2016

We organize at ICFO the half day meeting on cold atoms in the Barcelona region 2016. Our annual meeting is a great occasion to keep up with the research lines of the quantum gases groups at UB, UAB, UPC and ICFO. This year César gives a talk and Julio presents a poster on our latest experimental results.

HDM2016

03/02/2016

Observing a new s-wave Feshbach resonance in the 39K-41K mixture.

22/01/2016

Today we observe for the first time the miscible-immiscible transition in a 39K-41K mixture! Also, Leticia is awarded the young experimental physics prize of the Spanish Physical Society.

Celebration phase separation

21/01/2016

Celebrating the new 39K BEC, the fat 41K one (ultra-pure with 250000 atoms) and the new 39K-41K degenerate mixture in a Greek restaurant.
Celebrating 39KBEC

18/01/2016

Dual BEC of 39K and 41K! We produce for the first time this degenerate Bose-Bose mixture. Now, we just need to make the BECs grow…

15/01/2016

First 39K BEC!!! Sympathetic cooling of 39K by evaporation of 41K to quantum degeneracy works! Not too bad to start 2016.
First39KBEC_cropped

24/12/2015

QGE group season’s greetings: Feliz Navidad y Próspero 2016!
QGEChristmasCard2015
During 2015 we worked on cooling down all potassium isotopes: 41K (BEC Christmas tree), 39K and 40K (red MOT balls and white snow MOT balls respectively).

14/12/2015

QGE Christmas dinner 2015.
ChristmasDinner2016Group picture christmas 2015

07/12/2015

Our brand new dipole trap works, and we get nice 41K BECs in it.

27/11/2015

César and Pierrick present our research to all ICFOnians with a poster and a talk during the ICFO day, and César is awarded the poster prize. Congratulations!
CesarPosterPierrickTalkLabtour2

17/11/2015

39K in |1,1> in the crossed dipole trap.

12/11/2015

Today we get for the first time sympathetic cooling of 39K atoms by radio-frequency evaporation of 41K in the magnetic trap, and load up to 2×106 39K and 4×106 41K atoms in the crossed dipole trap!

10/11/2015

First 39K atoms in the magnetic trap.

03/11/2015

First two-isotope MOT! Cooling and trapping simultaneously 39K and 41K works!

02/11/2015

Julio starts officially today his PhD training period in the group. Welcome back, Julio!

27/10/2015

Jordi successfully defends today his bachelor thesis (TFG for the UPC degrees of Physics and Telecomunication engineering) entitled “Design and construction of optical superlattices for a quantum gas experiment”, and is awarded an excellent 9.8/10 grade. Well done, Jordi! It was a pleasure working with you during the last year, and we wish you all the best for your Master in Zurich!
JordiTFG
Afterwards, we go to Bill Phillips’ general public talk “Time, Einstein, and the coolest stuff in the universe…” in La Pedrera. We were already convinced that ultracold is ultracool and ultrafun, but after two hours of playing with balloons, magnets, liquid nitrogen and even an explosion, hopefully the complete audience agrees with us.

25/10/2015

Our BEC is back! After six bad weeks, during which we had to replace a leaky vacuum viewport in the 2D MOT chamber, we recover a nice BEC of more than 100000 41K atoms.

22/10/2015

ICFO organizes a symposium to celebrate the birthdays of Roy Glauber and Maciej Lewenstein. We enjoy a lot the two days of great talks and meet many friends and colleagues. It is particularly fun to show the lab to Tilman Esslinger and see again most of the former members of the QOT group.

DinnerMaciejBirthday

25/09/2015

Leticia writes together with Alessio Celi a Perspective article in Science commenting on the recent NIST and LENS experiments which visualize edge currents using synthetic gauge fields in synthetic dimensions.

16/09/2105

Cesar defends successfully today his thesis proposal in front of a committee formed by Selim Jochim (University of Heidelberg), Maciej Lewenstein and Robert Sewell (ICFO). We have very inspiring discussions with Selim on his bottom-up approach to quantum magnetism, and some fun showing him the lab.

14/09/2015

Julio spends two weeks in Les Houches, attending the Cold Atoms PreDoc School “Exploring new quantum gases”. He presents a poster, and Leticia gives a series of lectures during the second week on Fermi gases in optical lattices. Great training to start a PhD thesis in the best conditions!

10/09/2015

Julio defends successfully today his master thesis entitled “Design and construction of a fluorescence imaging system for a quantum gas experiment” and is awarded the best possible grade (Matrícula de Honor). Well done, Julio!

05/09/2015

BEC2015

Pierrick and Leticia attend this week the BEC 2015 – Frontiers in Quantum Gases conference in Sant Feliu de Guixols. This year, besides all the inspiring talks and discussions, there is also a special celebration for the 20 years of the first observation of BEC.

31/08/2015

Luca and Leticia attend this week a cool workshop in Dresden on Synthetic Quantum Magnetism. Luca presents a poster describing our experimental apparatus and future plans, and Leticia gives a talk on the Zurich spin correlation experiments.

31/07/2015

Leticia is this week in Glasgow, where she gives a series of lectures at the 71st Scottish Universities Summer School in Physics. It is a great opportunity to visit the fermionic quantum microscope lab of Stefan Kuhr, learn about the physics that is going on in Andrew Daley’s group and discover the atomic interferometry and super cool miniature MOTs that are developed at Strathclyde.

20/07/2015

Jordi appears today in La Vanguardia, in a focus article on the UPC Physics Engineering studies, and explains in a few words what BEC is for the general public.

18/07/2015

The crossed dipole trap finally works nicely.

Crossed_color

16/07/2015

Cesar gets today the pneumatically actuated mirror mounts for the MOT installed and working well.

02/07/2015

Leticia is in Les Houches, where she gives a seminar in the Statistical Physics Predoctoral School.

22/06/2015

Conference week: Pierrick is in Trento, attending the Cold Atoms Meet High Energy Physics workshop, whereas Leticia is in Warsaw, where she gives a keynote talk at the Quantum Technologies VI conference.

15/06/2015

Heading to fermions: today we see our first 40K MOT!
First_MOT 40K

08/06/2015

Group dinner in a Japanese restaurant to celebrate our first BEC and, as one can see from Julio’s T-shirt, the Barça victory in the Champions League.
BECdinner

04/06/2015

We have a BEC!!!
The first Spanish condensate was born today at 20h20. When pure, it has about 15000 41K atoms at 20 nK. Ultracold is ultracool!
FirstBEC

29/05/2015

It is getting colder and colder in lab 002: we now have more that one million atoms at 1 uK in the optical dipole trap!

22/05/2015

Today we see first atoms in the optical dipole trap.

20/05/2015

Today we get PSD=2.5×10-5

19/05/2015

Our first phase-space density measurement: PSD=10-6 after loading in the quadrupole trap
We do first trials of RF evaporation.

18/05/2015

Testing vacuum: we have >4 min lifetime in the magnetic trap!!!
We also get our lowest temperature to date: 16 uK after D1 gray molasses, with > 109 atoms.

LifeTimeQP

15/05/2015

Optical pumping and first atoms in the quadrupole trap!

08/05/2015

Leticia is today in Zaragoza, where she gives a talk in the condensed matter seminar series. It is really interesting to learn about their circuit-QED research there, both from the theoretical and the experimental point of view.

30/04/2015

First trials of sub-Doppler cooling with gray molasses.

25/04/2015

Our CMOT works!
Nice CMOT 25-04-2015

24/04/2015

Today we make our first really large 41K MOTs.

20/04/2015

Cesar is this week in Zurich attending the YAO (Young Atom Opticians) conference, where he also presents a poster on our experimental status.

31/03/2015

The bottom Bitter coil assembly is installed on the experiment. All our magnetic field coils are mounted now, so we are ready for experiments. Also, today is Lisa’s last day in the group. It was great having you all those last months, good luck with the future!

30/03/2015

The imaging test setup, with the complete lens tube, works. Well done, Lisa!

ImagingTestSetup

19/03/2015

We successfully install the top Bitter coil assembly on the science chamber!

18/03/2015

Many interesting talks and visits this week at ICFO thanks to the annual meeting of the SIQS FET project. Nice occasion to meet friends and learn about latest advances in the field.

11/03/2015

Nathan Goldman and Alexandre Dauphin visit this week the QOT group. Great talks on topological systems!

02/03/2015

We are participating in the quantum simulation FET collaborative project QUIC – QUantum Insulators and Conductors- together with groups at LENS, Institut d’Optique, ETH Zurich, University of Trento, Jagiellonian University and of course ICFO.

27/02/2015

Tarik Yefsah (MIT) visits us in his way back from Benasque. It is fun to see him again, chat about solitons and remember the ENS times.

16/02/2015

Jordi Sastre starts today his bachelor thesis (proyecto de fin de grado) project in the group, on the construction of our optical lattice setup. Welcome back to the QGE, Jordi!
Also, we finally observe the fluorescence of the atomic beam from the 2D MOT. Our longitudinal molasses cooling really works!

09/02/2015

Leticia visits Henning Moritz’s group in Hamburg. It is great to see their fully built lithium machine, to discuss physics and technology, and of course to meet again old friends. Thanks also to the Sengstock group for the labtours.

06/02/2015

Imaging smaller and smaller objects with Lisa’s test imaging setup. Current record: seeing element 9-3 of the USAF 1951 test target.
USAF test setup

05/02/2015

Pierrick is awarded a Marie Curie fellowship. Congratulations!

31/01/2015

ICFO ski weekend in Andorra, attended by almost all the QGE group. Awesome snow conditions and a lot of fun!

QGE group Andorra 2015

30/01/2015

The complete group attends the annual Cold Atoms in Barcelona meeting at UAB, where all BEC-related groups in the region present their current research. Pierrick gives a talk on our experimental progress, and Cesar presents a poster. It is a great opportunity to get to know each other better, and learn about what’s going on in the other teams.

23/01/2015

First absorption images.

First absorption image

21/01/2015

Leticia goes to the Netherlands, to the FOM Physics meeting in Veldhoven. It is a great occasion to visit as well Florian Schreck’s super cool new labs in Amsterdam, and learn about Strontium.

07/01/2015

First 41K 2D and 3D MOTs.

25/12/2014

QGE group season’s greetings: Feliz Navidad y Próspero 2015!

ChristmasCard2014

First potassium MOTs in our apparatus: in the science chamber (star) and in the 2D MOT chamber (tail).

19/12/2014

First MOT in the science chamber of our apparatus! We trap our first cold atoms in there just a few minutes before going to ICFO’s Christmas dinner. There we really have something to celebrate! Exciting times are waiting for us after the Christmas break. Happy holidays to everyone!!!

ExperimentWithBreadboardsFirstMOTScienceChamberQGECavaChristmas2014

16/12/2014

Today we see our first 2D and 3D MOTs, just in time for Christmas!!! By adding a pair of coils in the longitudinal direction, we make a 3D MOT of 39K in the 2D MOT chamber. Switching off these coils allows us to image a few minutes later our first 2D MOT as well. Really easy!

First3DMOTin2D MOTchamberFirst2DMOT

26/11/2014

Leticia is awarded one of the five fellowships of the 2014 L’Oréal-UNESCO For Women In Science Spanish program. Maybe this will boost parity in our group in the long term? For the moment, it will certainly boost Lisa’s imaging project!

18/11/2014

We also see potassium fluorescence in the 2D MOT chamber today. Hunting for a 2D MOT in progress…

17/11/2014

Leticia is in Madrid today, in Emilio Alba’s PhD defense at UCM. Congratulations, Dr. Alba!

12/11/2014

Leticia is in Bordeaux for a couple of days, in a workshop on Dirac and Topological Matter organized by Jérôme Cayssol. A very nice occasion to present our ETH experiments, learn more on the topic from a solid-state perspective, meet again the Bordeaux colleagues and see the progress of LP2N.

10/11/2014

Seeing potassium absorption in the 2D MOT chamber. Yes, there is really potassium in there.

06/11/2014

Group dinner in Leticia’s place. We have to celebrate that we are really a potassium team now.

QGE_dinner_11-2014

05/11/2014

Today we break the potassium ampoule inside the 2D MOT chamber!

03/11/2014

Luca Tanzi joins the group as a postdoc. Welcome to the group, Luca!

Also, we obtain funding from the BBVA Foundation to develop further our imaging system. Cool!

19/10/2014

We finish today the chamber bake-out!

06/10/2014

Leticia is this week in Benasque, teaching in a Quantum Optics and Non-linear Optics School of the Optics Section of the Spanish Physical Society, organized by Germán de Valcárcel and Verónica Ahufinger.

01/10/2014

Julio Sanz joins the group as a master student. Besides working on the experiment, he will do as well a theory project with Pietro Massignan on the Bose polaron, to prepare possible experiments. Welcome to the group, Julio!

19/09/2014

Today we finish assembling the viewports of the vacuum chamber. In the pictures one can see the machine in its final configuration.
Machine before final bakingchamber of secrets

12/09/2014

Farewell futbolin and tapas with Manel, who leaves us today after the end of his Master thesis. It was great having you in the group, and we all wish you a lot of good luck for your new Yb adventure in Paris!

Farewell futbolin ManelFarewell tapas Manel

manel_master_thesis1

09/09/2014

Manel successfully defends today his master thesis “An experimental setup for gray molasses sub-Doppler cooling of potassium gases”, being awarded the best possible grade (Matrícula de Honor). Well done, Manel!

08/09/2014

Salvatore Manmana (University of Goettingen) visits us today in his way back from Benasque and presents some of his latests results on the dynamics of strongly correlated 1D fermionic systems.

01/09/2014

Lisa Saemisch joins us for a six-month internship within her Master studies at the University of Bonn. During this time she will work on the design and construction of our imaging system. Welcome to the group, Lisa!

30/08/2014

The chamber is finally back to room temperature. Measured pressure: 5×10-10 mbar, limited by the detectivity of our hot cathode gauge.

14/08/2014

Chamber during the high temperature bake-out. What animal do you see in there?
mamutfante1

04/08/2014

Congratulations to César for being awarded a CONACYT PhD fellowship from Mexico!

01/08/2014

We start baking the main vacuum chamber. Also, today is Vincent’s last day at ICFO. All the best for the future!
High temperature bakingVincent's last day

31/07/2014

Farewell evening for Vincent, who finishes tomorrow his internship in the group. In his honor we organize the first QGE pétanque game in front of ICFO. For sure it will not be the last one…

Petanque jugglingFirst QGE petanque

29/07/2014

After all the baking we get nice vaccum in our 2D MOT chamber.

2D MOT pressure

25/07/2014

Tasting horchata with fartons at ICFO’s cafeteria. Thanks a lot, Jordi!

18/07/2014

Pierrick builds today the first complete Bitter coil assembly and test both the Feshbach and quadrupole coils with up to 400 A.
Bitter_2

16/07/2014

We have finished the assembly of our vacuum system (except for the viewports), which is now ready for the high temperature bakeout.
Machine_1

10/07/2014

Our 2D MOT chamber is finally ready (no leaks) and we start baking it.
2D MOT_zoom

07/07/2014

Varenna2014

César is this week in Varenna (Italy), attending an ultracool summer school on Quantum Matter at Ultralow Temperatures.

05/07/2014

We start assembling the vacuum chamber today.

01/07/2014

Jordi Sastre (physics and telecomunication engineer student from UPC) joins the group as ICFO Summer Fellow. During the next three months, he will work on the setup of our RF and MW system, as well as on the computer control of the experiment. Welcome to the group, Jordi!

30/06/2014

Houches Summer School

 

Leticia is this week in Les Houches (France) where she gives a presentation in the computational physics summer school that Tommaso Roscilde and Markus Holzmann are organizing this summer. It is a great occasion to learn more about numeric methods for strongly correlated systems and meet again former collaborators, as both Corinna Kollath and Lode Pollet are teaching the same week.

26/06/2014

Leticia is in Aarhus (Denmark), attending the conference Cold atoms and beyond organized by Jesper Levinsen and Georg Bruun, and gives a talk on the ETH magnetism experiments. This is a very nice and lively conference, and although it is hard to get there due to airport strikes, it is really worth it!

23/06/2014

Assembling the 2D MOT chamber. Our first indium seals turn out to leak, we need to work a bit more on that…

17/06/2014

Tobias Tiecke (Harvard University) visits ICFO and gives a very cool talk on merging nanophotonics and cold atoms. It is nice to see Tobias again, discuss a bit about physics and show him our lab.

 

Golden mirror

16/06/2014

Today we make use of the ICFO clean room facilities to coat with gold the in vacuum mirror for our 2D MOT. Thanks a lot to the NPL people for the great job!

 

15/06/2014

Winding the first 2D MOT coil!
2D MOT coil

Manel with first vacuum

13/06/2014

Our first Spanish vacuum! We start slowly, just baking the kapton insulated wire for our RF antennae to check how well our brand new ultrasound bath, pumping stations, gauge, variacs, heating tapes and temperature logger work.

10/06/2014

Alessandro Seri (University of Camerino) visits us and gives an informal presentation on his Master thesis work, on “Two-qubit entanglement by a commercial projector”.

06/06/2014

We get today a second lab for the group! It is great to have more space to test electronics, coils and optics, and also to bake our vacuum chamber.
Moving the optical tableTiding up the lab 003The lattice boys in lab 003

28/05/2014

Oleksiy Onishchenko (TU Delft) visits us and gives an informal presentation on his Master thesis work in Ronald Hanson group.

Mephisto MOPA arrival

20/05/2014

Our YAG laser for the dipole trap arrives today at ICFO!

12/05/2014

Luis Santos (University of Hanover) visits ICFO for two weeks. We have a very interesting discussion on interaction modulated optical lattices, and also enjoy a lot his talk.

30/04/2014

Luca Tanzi (LENS) visits us for two days, and gives a talk on his PhD thesis work: the study of strongly correlated Bose gases in quasi-periodic potentials and the observation of a Bose glass. It is really interesting to learn from Luca about the different phases that arise from the interplay of disorder and interactions, and how to detect them. We are specially impressed by the spectroscopic features that they observe now. We hope that Luca enjoys the visit to the different ICFO cold atom labs, and the long discussions with Maciej’s group. In the evening we go for tapas and drinks in Barceloneta with Pietro and, as always, “Massignan advisor” never fails!

25/04/2014

Leticia is awarded a Marie Curie Career Integration Grant. We of course already have many ideas of equipment that we will get for the experiment with it. In the evening we go for tapas and drinks to celebrate. There are many other things to celebrate as well: the big progress in the laser system and the tapered amplifiers, the coils, Vincent’s arrival… Christine Guerlin (LKB) is visiting for the weekend, and she comes to celebrate with us.

24/04/2014

Georg Brunn (University of Aarhus) visits Pietro Massignan at ICFO today and gives a great talk on the Higgs mode in microtrapped fermionic systems and on quantum hexatic phases. We have a nice discussion with Georg over lunch time.

22/04/2014

Vincent Lienhard joins the group for his ENS Cachan M1 internship, during which he will develop EOMs, a part of the laser system and start preparing our optical dipole trap. Welcome to the group, Vincent!

14/04/2014

OIST photo small

Leticia is this week in a workshop organized by OIST at Okinawa (Japan), where she gives an invited talk on fermions in tunable geometry optical lattices. In the poster session we have interesting discussions on unitary Bose-Fermi mixtures and on Bose-Bose mixtures in optical lattices. It is nice to meet former collaborators again: Jing Zhang and Corinna Kollath are also attending the conference.

11/04/2014

Celebrating Leticia’s birthday at ICFO’s cafeteria (one day in advance). Thanks very much to César, Manel and Pierrick for the cake!

Leticia's birthday

08/04/2014

Manel gets his laser locked on the D1 line today. Our four lasers are locked now!

07/04/2014

Lisa Saemisch (University of Bonn) visits ICFO. Lisa will join the group next fall for a 6-month internship, during which she will work on the development of our imaging system.

31/03/2014

ICFO hosts this week YAO, the Young Atom Opticians conference. It is a great opportunity to see what’s going on in most of the European groups in the field. It is also nice to see the newest results of the ETH lattice machine, and the progress of the Bordeaux experiment. Leticia gives a talk, and César presents a poster which is the most voted in the poster competition. Well done, César!

YAO2014 group pictureYAO 2014 lab002 visit

28/03/2014

Our pizza dinner pays off: Pierrick gets today the first Bitter coil prototype working!

26/03/2014

César gets the two offset locks for the cooling and repumping lasers working. All lasers on the D2 transition are stabilized today. In the process, we order our first pizza dinner at ICFO to get some energy and finish the work.
First pizza in the lab Bitter coil prototype

12/03/2014

Sebastian Diehl (University of Innsbruck) visits ICFO and gives a series of lectures on the Keldysh formalism for dissipative quantum systems.

25/02/2014

Francesca Ferlaino (Univeristy of Innsbruck) visits ICFO. As always, it is very nice to see Francesca and chat about life, physics and Erbium with her.

20/02/2014

Alexandre Dauphin (UCM and ULB) visits ICFO this week and gives a talk on the detection of topological order in cold atom systems. It is nice to see Alexandre again and discuss about possible implementations of his proposals on our new setup.

18/02/2014

First K spectroscopyToday we see our first potassium spectroscopy in the lab!  Also, our ETH theory-experiment comparison for the magnetism experiments is accepted in PRL.

12/02/2014

Sören Dörscher (University of Hamburg) visits us and gives a talk on his PhD thesis work: the construction of an Yb BEC and DFG apparatus. We learn a lot on AEL atoms, and also on the physics that is going on in Klaus Sengstock’s group. In the evening we go for dinner in Gotic, do a bit of wine tasting and even have a look at the Barceloneta beach by night.

03/02/2014

Our lab is officially delivered today, the building works being completely finished. We have been getting a nice temperature stability over the last days: about 0.1ºC inside the enclosures of the optical tables. Let’s hope it stays like this forever. Of course, this would not have been possible without the efforts of the ICFO facilities’ team. Thanks a lot for all those months of hard work!

first screwStarting the laser systemLab002

31/01/2014

Leticia goes to Madrid to attend the 6th Madrid meeting on ultracold atoms, and gives a talk on tunable geometry lattices. Now we know not only the cold atom physics that is going on in Barcelona, but also in Madrid. Thanks to Francesca and Belén for the invitation and the great organization!

30/01/2014

Grigori Astrakharchik organizes at UPC a half-day meeting on cold atoms in the Barcelona region. It is a good occasion to present our work and learn about the physics that our neighbors do not only at ICFO, but also at UAB, UB and UPC.

29/01/2014

We take our first group picture. The weather is quite nice, so we go to the beach of Castelldefels for it. According to Pierrick, next time we should bring not only the camera, but also a good photographer. In the afternoon, Pierrick winds our first coil! Many of them will follow…
Group picture 29-01-2014first cloverleaf coil

07/01/2014

César starts officially his PhD training period in our group.

13/12/2013

Carlos Lobo (University of Southampton) visits ICFO and gives a very interesting talk on optical lattices with large scattering length.

03/12/2013

César Cabrera arrives to Barcelona, and will start soon his PhD thesis in the group. Welcome to Spain, César!

02/12/2013

Pau Gómez (LMU Munich) visits us. In the picture, Pau, Pierrick and Leticia eating german Christstollen and cookies in the cafeteria. Thanks, Pau!
Christstollen and cookies at ICFO

20/11/2013

Manel Bosch joins the group as a master student, and will work on the design and construction of a laser system on the D1 line for gray molasses sub-Doppler cooling. Welcome, Manel!

11/11/2013

Invited by Grigori Astrakharchik, Leticia gives a talk at UPC entitled “Engineering synthetic quantum materials with ultracold fermions in a tunable-geometry optical lattice” on the ETH Zurich experiments. Afterwards we brainstorm a bit on possible experiments with isotopic potassium mixtures, as well as on experiments with strongly interacting fermions in shallow optical lattices.

04/11/2013

Pierrick Cheiney joins the group as a postdoc. Welcome, Pierrick!

23/10/2013

The optical tables are installed in the lab!

The optical tables are now in the labOptical table and closets in the lab

21/10/2013

The major part of our lab renovation is finished! Now that ICFO’s lab 002 is almost ready, we can start to move in.

02/10/2013

Cesar Cabrera (University of Bonn) visits ICFO and gives a presentation on his Master thesis work in Martin Weitz’s group, where he worked on the generation of optical lattices for photon BECs.

01/10/2013

The comparison of our ETH magnetic correlations experiments in effective 1D chains to theory is now on the arxiv. The DCA simulations done in Matthias Troyer’s group show that our measurements correspond to temperatures below the tunneling in the chains. Our method is thus well adapted to the study of low temperature 1D physics.

30/09/2013

Our optical tables arrive this morning to ICFO!

26/09/2013

Invited by Miguel Angel Martín Delgado, Leticia visits Universidad Complutense de Madrid and gives a talk entitled “Engineering synthetic quantum materials with ultracold fermions in a tunable-geometry optical lattice” on the ETH Zurich experiments. At UCM we have interesting discussions on the influence of dissipation on topological phases. We also talk about detection schemes for edge states, as well as about digital quantum simulation schemes with ions and Rydberg atoms. Going to Madrid is a nice occasion to visit Juanjo García Ripoll and Jordi Mur at CSIC too.

16/09/2013

The week is very busy, with so many participants from the BEC 2013 conference visiting ICFO and presenting (formally or informally) their work: Tarik Berrada (Vienna), Manuele Landini (Florence), Jesper Levinsen (Aarhus), Ludwig Mathey (Hamburg) and Meera Parish (London). Good friends from Zurich times visit Barcelona as well: Kris Baumann (Stanford), Daniel Greif and Renate Landig (ETH Zurich) are here!
DanielRenate2013

07/09/2013

Leticia goes to Sant Feliu de Guixols for the BEC 2013 conference, and presents a poster entitled “Short-range quantum magnetism of ultracold fermions in an optical lattice” on the ETH Zurich work. The hot topic of the conference this year is without any doubt the simulation of artificial gauge fields, and Wolfgang Ketterle presents a very clear introduction to the topic. The Rice results (and our experiments) on magnetism are actively discussed as well. It is great to have so many inspiring discussions, and also to meet again so many good colleagues and friends! We take advantage of the occasion to plan with Tobias Donner, Thomas Uehlinger and  Henning Moritz the future developments of Experiment Wizard, with which they do the computer control of the experiments in Zurich and Hamburg, and that we will use in Barcelona. We also discuss with Corinna Kollath, Lei Wang and Matthias Troyer the status of the numerical simulations that they have done for our ETH spin work.

06/09/2013

Henning Moritz (University of Hamburg) visits ICFO in his way to the Sant Feliu BEC 2013 conference. We have endless discussions on basically everything, from air conditioning systems to ion trapping and the physics of 2D Fermi gases. Henning is happy to see the progress of the labworks after all the advice he gave (thanks again!). In the evening we go out for dinner and drinks in Barcelona with Jing and Henning. As Pietro Massignan (ICFO) and Matteo Zaccanti (LENS) join, Fermi polarons are part of our beers’ discussions.

05/09/2013

Jing-Zhang-web Jing Zhang (University of Shanxi, China) visits ICFO to give a talk entitled “Experimental study of a spin-orbit coupled degenerate Fermi gas”. It is really nice to see Jing again after all those years and remember the old ENS times. We have many interesting discussions, from non-abelian gauge fields to magnetic field control and optimal coil windings.

30/08/2013

Sebastian Krinner (ETH Zurich) visits Barcelona in his way to a satellite meeting of the BEC 2013 conference on disordered systems. It is a very nice occasion to learn about the most recent progress on the ETH transport experiment.

29/08/2013

Pierrick Cheiney (University of Cambridge) visits ICFO to give a talk entitled “Scattering of matter-waves on a finite size lattice”, on his PhD thesis work in David Guéry-Odelin’s group at the University of Toulouse.
Pierrick-Cheiney-web

23/08/2013

Laura Corman (ENS Paris) visits ICFO, and also Barcelona for the weekend. In the breaks from our touristic visits of the city we have interesting discussions on her recent experiments in Jean Dalibard’s group on 2D Bose gases in box-like potentials.

05/08/2013

Leticia visits ETH Zurich. Besides taking part on the yearly quantum optics group hike and meeting all the QO people again, it is great to see the recent progress on the four experiments, and especially on the lattice machine! Martin Lebrat presents the status of the EOM technology transfer project as well. Tobias Donner and Tilman Esslinger give great advice and a lot of tips on lab renovation and organization. Thanks a lot, Tobi and Tilman!

QOhike2013

01/08/2103

Martin Pototschnig (Caltech) visits ICFO to give a talk on “Interfacing Cold Atoms”. Martin presents the progress done in Jeff Kimble’s group on coupling cold atoms to photonic crystal structures. It is a nice occasion to get to know better the work of Darrick Chang’s group at ICFO on the theoretical proposals for these experiments.

25/07/2013

During the whole week ICFO hosts a summer school on “Frontiers of Quantum Physics and Quantum Information”. Particularly inspiring for our research are the lectures of Ignacio Cirac on Tensor Network Methods, Misha Lukin on CQED with nanophotonic systems and Immanuel Bloch on optical lattices, where he presents the Munich realization of the Harper hamiltonian.

15/07/2013

The QGE group (Quantum Gases Experimental group) website is launched. Thanks a lot to ICFO’s IT unit for their support, and to Romain Pacanowski (Institut d’Optique, Bordeaux) and Thomas Uehlinger (ETH Zurich) for their very good advice!

02/07/2013

Invited by Salvatore Manmana, Leticia visits Götttingen and gives a talk on “Simulating synthetic quantum materials with ultracold fermions in a tunable-geometry optical lattice”. Götttingen is an awesome university city, and it is quite impressive to see the original Hilbert-Raum (not so large after all…), Heisenberg’s office window and the old physics department where quantum mechanics was born. We have interesting discussions on out-of-equilibrium physics, solar cells and multi-orbital lattice models.

24/06/2013

After a lot of planning, our lab renovation works start! ICFO’s lab 002 will be completely remodeled to meet our needs. This includes the installation of a new air conditioning system, temperature stabilized flow boxes and a water cooling circuit. The electricity of the room will be modified as well, to have enough power for our Feshbach coils.

08/06/2013

Leticia goes to CLEO 2013 (San José, USA), and gives an invited presentation on the Quantum Simulators Symposium entitled “Simulating graphene with ultracold fermions in a honeycomb optical lattice”, on the ETH Zurich work. Going to the Bay area is a very nice opportunity to visit the Stanford labs as well, including Mark Kasevich’s and Ben Lev’s experiments. In particular, it is great to see Kris Baumann again, and learn about his work on the Dysprosium machine! In San Francisco, Jason McKeever shows the Entanglement Technologies lab, and their gas sensing prototype using two high-finesse optical cavities. It is exciting to see all this lab technology finally getting industrial applications.

03/06/2013

Leticia moves to Barcelona. The Ultracold Quantum Gases Group at ICFO is born!