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Helium - Lattice

Helium - Lattice

Permanent staff: Thomas Chalopin, David Clément 

Post-doc: Jan-Philipp Bureik

PhD students: Maxime Allemand, Géraud Dupuy

Interns: Jean-Paul Nohra, Paul Paquiez

We have built an apparatus to manipulate metastable Helium atoms (He*) loaded in optical lattices and to measure atom-atom correlations in many-body quantum states. The special properties of He*, its light mass and its large internal energy, enable an original and innovative detection method which can reconstruct the three dimensional positions of and correlations between individual atoms after a long time of free fall, providing direct access to momentum-space correlations.


May 2024: we worked on the characterisation of our single-atom detector and applied approaches from quantum detector tomography, with some modification to account for the shot-to-shot fluctuations to the total atom number. Read our new preprint if you are interested : arxiv:2405.01211 (2024)

January 2024: we publish a new preprint where we report the observation of non-Gaussian correlations associated with quantum fluctuations induced by interactions - check here : arxiv:2401.15340 (2024)

January 2024: Thomas Chalopin is joining the Lattice Helium team with a permanent CNRS position!! Welcome Thomas!!

April 2023: we have published a puzzling observation in Phys. Rev. Lett., for which we have yet no clue about its microscopic origin: algebraic tails 1/k^4 in the time-of-flight distributions of Bose-Einstein condensates in the presence of impurities. Many thanks to our theory collaborators Pietro and Thierry! 


March 2023: we published a Letter in Phys. Rev. Research. Here we exploit the single-atom-resolved detection method to measure correlations between up to 6 individual atoms! We characterize emblematic states like BECs and Mott insulators with unprecedented resolution, obtaining new information. 



January 2023: Antoine received one of the Best PhD prize from the Doctoral School EDOM (link), congrats !! 


October 2022: we are extremely pleased to congratulate Alain for receiving the 2022 Nobel prize in Physics with J. Clauser and A. Zeilinger!!!!



May 2022: Jan-Philipp is awarded a prize for his talk at the PhD days of the Doctoral school EDOM. Congrats!!

April 2022:  We had a great scientific workshop to discuss the most recent advancements in the context of ultracold atom physics and related fields. Experimental and theoretical groups from Palaiseau (France) and Florence (Italy) research areas gathered to present their activities and discuss collaborations in topics ranging from metrology and entanglement to quantum transport and simulation. The scientific program and all the information here:

November 2021: our observation of Bogoliubov's pairs at opposite momenta in the quantum depletion of an ensemble of interacting bosons is now published in Nature Physics, along with a News and Views by our Australian colleagues S. Hodgman and A. Truscott.








Tomography of a single-atom-resolved detector in the presence of shot-to-shot number fluctuations, M. Allemand, R. Jannin, G. Dupuy, J.-P. Bureik, L. Pezzè, D. Boiron, D. Clément, arxiv:2405.01211 (2024).

Suppression of Bogoliubov momentum pairing and emergence of non-Gaussian correlations in ultracold interacting Bose gases, J.-P. Bureik, G. Hercé, M. Allemand, A. Tenart, T. Roscilde, D. Clément, arxiv:2401.15340 (2024).

Non-Gaussian correlations in the steady-state of driven-dissipative clouds of two-level atoms, G. Ferioli, S. Pancaldi, A. Glicenstein, D. Clément, A. Browaeys, I. Ferrier-Barbut, Phys. Rev. Lett. 132, 133601 (2024).


Observation of 1/k^4-tails after expansion of Bose-Einstein Condensates with impurities, H. Cayla, P. Massignan, T. Giamarchi, A. Aspect, C. Westbrook, D. Clément,  Phys. Rev. Lett. 130, 153401 (2023)

Full counting statistics of interacting lattice gases after an expansion: quantifying many-body coherence from atom correlations, G. Hercé, J.-P. Bureik, A. Ténart, A. Aspect, A. Dareau, D. Clément, Phys. Rev. Research 5, L012037 (2023).

Fermionic correlation functions from randomized measurements in programmable atomic quantum devices, P. Naldesi, A. Elben, A. Minguzzi, D. Clément, P. Zoller, B. Vermersch, Phys. Rev. Lett. 131, 060601 (2023).


Observation of pairs of atoms at opposite momenta in an equilibrium interacting Bose gas, A. Tenart, G. Hercé, J.-P. Bureik, A. Dareau, D. Clément,  Nature Physics 17, 1364–1368 (2021).  - see accompagnying News and Views.

Studying the low-entropy Mott transition of bosons in a three-dimensional optical lattice by measuring the full momentum-space density, G. Hercé, C. Carcy, A. Tenart, J.-P. Bureik, A. Dareau, D. Clément, T. Roscilde, Physical Review A 104, L011301 (2021) - selected as Editors' suggestion

Certifying the adiabatic preparation of ultracold lattice bosons in the vicinity of the Mott transition, C. Carcy, G. Hercé, A. Tenart, T. Roscilde and D. Clément, Phys. Rev. Lett. 126, 045301 (2021) - selected as Editors' suggestion

Position- and momentum-space two-body correlations in a weakly interacting trapped condensate, S. Butera, D. Clément, I. Carusotto, Phys. Rev A 103, 013302 (2021).


Hanbury-Brown and Twiss bunching of phonons and of the quantum depletion in an interacting Bose gas, H. Cayla, S. Butera, C. Carcy, A. Tenart, G. Hercé, M. Mancini, A. Aspect, I. Carusotto, D. Clément, Phys. Rev. Lett. 125, 165301 (2020)

Two-body collisions in the time-of-flight dynamics of lattice Bose superfluids, A. Tenart, C. Carcy, H. Cayla, T. Bourdel, M. Mancini, D. Clément, Phys. Rev. Research 2, 013017 (2020) - selected as Editors' suggestion.


Momentum-space atom correlations in a Mott insulator, C. Carcy, H. Cayla, A. Tenart, A. Aspect, M. Mancini, D. Clément, Phys. Rev. X 9, 041028 (2019).

Contact and sum-rules in a near-uniform Fermi gas at unitarityC. Carcy, S. Hoinka, M. G. Lingham, P. Dyke, C. C. N. Kuhn, H. Hu, C. Vale, Phys. Rev. Lett. 122, 203401 (2019).


Tan's Contact for Trapped Lieb-Liniger Bosons at Finite Temperature, H. Yao, D. Clément, A. Minguzzi, P. Vignolo, L. Sanchez-Palencia Phys. Rev. Lett. 121, 220402 (2018).

Single-atom-resolved probing of lattice gases in momentum space, H. Cayla, C.Carcy, Q. Bouton, R. Chang, G. Carleo, M. Mancini, D. Clément, Phys. Rev. A 97 061609(R) (2018)


Quantum depletion of a homogeneous Bose-Einstein condensate , R. Lopes, C. Eigen, N. Navon, D. Clément, R. P. Smith, Z. Hadzibabic, Phys. Rev. Lett. 119, 190404 (2017).


Momentum-resolved observation of thermal and quantum depletion in an interacting Bose gas, R. Chang, Q. Bouton, H. Cayla, C. Qu, A. Aspect, C. I. Westbrook, D. Clément, Phys. Rev. Lett. 117, 235303 (2016).


Characterization of a detector chain using a FPGA-based Time-to-Digital Converter to reconstruct the three-dimensional coordinates of single particles at high flux, F. Nogrette, D. Heurteau, R. Chang, Q. Bouton, C. I. Westbrook, R. Sellem, D. Clément, Rev. Scient. Intrum. 86, 113105 (2015)

Fast production of Bose-Einstein condensates of metastable Helium, Q. Bouton, R. Chang, L. Hoendervanger, F. Nogrette, A. Aspect, C. I. Westbrook, D. Clément Phys. Rev. A 91 061402(R) (2015)

Dynamical structure factor of one-dimensional Bose gases: experimental signatures of beyond-Luttinger liquid physics, N. Fabbri, M. Panfil, D. Clément, L. Fallani, M. Inguscio, C. Fort and J.-S. Caux, Phys. Rev. A 91, 043617 (2015)


Three-dimensional laser cooling at the Doppler limit, R. Chang, A.L. Hoendervanger, Q. Bouton, Y. Fang, T. Klafka, K. Audo, A. Aspect, C. I .Westbrook and D. Clément Phys. Rev. A 90 063407 (2014) [selected as Editors's suggestion]


Influence of Gold Coating and Interplate Voltage on the Performance of Chevron Micro-Channel Plates for the Temporally and Spatially Resolved Single Particle Detection, A.L. Hoendervanger, D. Clément, A. Aspect, C.I. Westbrook, D. Dowek, Y. Picard and D. Boiron Rev. Scient. Instrum. 84 023307 (2013)


An oscillator circuit to produce a radio-frequency discharge and application to metastable helium saturated absorption spectroscopy, F. Moron, A.L. Hoendervanger, M. Bonneau, Q. Bouton, A. Aspect, D. Boiron, D. Clément and C.I. Westbrook, Rev. Scient. Instrum. 83 044705 (2012)


Videos by Hugo related to the experiment:

Refroidir les atomes 

La machine



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