QuaCor

ANR project: Cold atoms, photons, and quantum correlations (QuaCor)

Cold atoms coupled to photons are a promising platform for quantum information, computation and communication. In this project, the goal is to focus on two specific tools: sources of correlated photons and memories, exploiting collective, multimode quantum states of atomic ensembles. The main scientific objectives are:

• Explore a new kind of correlated photon source based on a multi-atom ensemble: Our goal is to explore a new kind of source of photons, based on the correlations inside the Mollow triplet, and using a many-atom system such as a cold atomic cloud.
• Long-lived quantum memories with atomic ensembles: Our goal is to exploit collective subradiant states of atomic ensembles as novel memories.

This collaborative project gathers physicists, experimentalists and theoreticians, from France and Brazil. In 2019, we obtained an international research grant from the French national research agency (ANR) to support our effort (282 k€ for 4 years: 2020-2023).
 

News & events

Consortium

Institut de Physique de Nice, team "cold atoms" (UCA, CNRS)

• Mathilde Hugbart (PI of the ANR project)
• William Guerin
• Robin Kaiser
• Hodei Eneriz (Post-doc)
• Pierre Lassègues (PhD student)
• Martial Morisse (PhD student)
• Stephan Asselie (PhD student)

Universidade Federal de São Carlos (UFSCar), São Carlos (Brazil)

 

• Romain Bachelard (co-PI of the ANR project)
• Raul Celistrino Teixeira
• Andre Cidrim (Post-doc)
• Mateus Biscassi (PhD student)
• Pablo Gabriel Santos Dias (PhD student)
• Pedro Henrique Nantes Magnani (PhD student)

        Alumni : Elnaz Darcheshdar

Instituto de Física de São Carlos (IFSC), Universidade de São Paulo (USP), São Calos (Brazil)

 

• Philippe Courteille
• Marcia Frometa Fernandez (PhD student)

Publications

 

Breaking of reciprocity and the Pancharatnam-Berry phase for light scattered by a disordered cold atom cloud
P. H. N. Magnani, P. G. S. Dias, M. Frometa, M. A. Martins, N. Piovella, R. Kaiser, Ph. W. Courteille, M. Hugbart, R. Bachelard, R. C. Teixeira
Phys. Rev. A accepted (2024), preprint : arXiv:2401.0529

Condensation of vanishing photon emission rates in random atomic clouds
V. Viggiano, R. Bachelard, F. Deelan Cunden, P. Facchi, R. Kaiser, S. Pascazio, F. V. Pepe, A. Scardicchio
preprint: arXiv:2407.11858

Nonlinear effects in Anderson localization of light by two-level atoms
N. Araujo Moreira, R. Kaiser, and R. Bachelard
Phys. Rev. A (L) 109, L031501 (2024), preprint: arXiv:2311.01632

Detecting entanglement from macroscopic measurements of the electric field and its fluctuations
P. Rosario, A. C. Santos, N. Piovella, R. Kaiser, A. Cidrim, and R. Bachelard,
Phys. Rev. Lett. 133, 050203 (2024), preprint: arXiv:2404.15973

Temporal coherences of atomic chaotic light sources: The Siegert relation and its generalisation to higher order correlation functions
M. Morisse, S. Joshi, J. Mika, J. C. C. Capella, R. Kaiser, R. Bachelard3, L. Slodicka,and M. Hugbart
EPL 147, 15001 (2024), preprint: arXiv:2404.01711

Cooperative photon emission rates in random atomic clouds
V. Viggiano, R. Bachelard, F. Deelan Cunden, P. Facchi, R. Kaiser, S. Pascazio, and F. V. Pepe
Phys. Rev. A 108, 063701 (2023), preprint: arXiv:2306.06055

Transition from classical to quantum loss of light coherence
P. Lassègues, M.A.F. Biscassi, M. Morisse, A. Cidrim, P. G. Santos Dias, H. Eneriz, R. Celistrino Teixeira, R. Kaiser, R. Bachelard and M. Hugbart
Phys. Rev. A 108, 042214 (2023) Editors’ suggestion, preprint: arXiv:2210.01003

Super- and subradiance in dilute disordered cold atomic samples: observations and interpretations
W. Guerin
Advances in Atomic, Molecular and Optical Physics 72, 253 (2023), preprint: arXiv:2306.02891

Optical interpretation of linear-optics superradiance and subradiance
S. Asselie, A. Cipris, W. Guerin
Phys. Rev. A 106, 063712 (2022), preprint: arXiv:2209.00918

Generating long-lived entangled states with free-space collective spontaneous emission
A. Costa dos Santos, A. Cidrim, C. J. Villas-Boas, R. Kaiser, R. Bachelard
Phys. Rev. A 105, 053715 (2022), preprint: arXiv:2110.15033

Field and intensity correlations: the Siegert relation from stars to quantum emitters
P. Lassègues, M.A.F. Biscassi, M. Morisse, A. Cidrim, N. Matthews, G. Labeyrie, J.P. Rivet, F. Vakili, R. Kaiser,W. Guerin, R. Bachelard and M. Hugbart
Eur. Phys. J. D 76, 246 (2022), preprint: arXiv:2209.06480

Mirror-assisted backscattering interferometry to measure the first-order correlation function of the light emitted by quantum scatterers
P. G. S. Dias, M. F. Fernandez, P. H. N. Magnani, K. R. B. Theophilo, M. Hugbart, P. W. Courteille, R. Celistrino Teixeira
Phys. Rev. A 104, 053716 (2021), preprint: arXiv:2108.01437

Subradiance in dilute atomic ensembles: Role of pairs and multiple scattering
Y. A. Fofanov, I. M. Sokolov, R. Kaiser, W. Guerin
Phys. Rev. A 104, 023705 (2021), preprint: arXiv:2012.10659

Photon-photon correlations from a pair of strongly coupled two-level emitters
E. Darsheshdar, M. Hugbart, R. Bachelard, C. J. Villas-Boas
Phys. Rev. A 103, 053702 (2021), preprint: arXiv:2012.03735

van der Waals dephasing for Dicke subradiance in cold atomic clouds
A. Cipris, R. Bachelard, R. Kaiser, W. Guerin
Phys. Rev. A 103, 033714 (2021), preprint: arXiv:2012.06248

Subradiance with saturated atoms: population enhancement of the long-lived states
A. Cipris, N. A. Moreira, T. S. do Espirito Santo, P. Weiss, C. J. Villas-Boas, R. Kaiser, W. Guerin, R. Bachelard
Phys. Rev. Lett. 126, 103604 (2021), preprint: arXiv:2009.05172

Superradiance as single scattering embedded in an effective medium
P. Weiss, A. Cipris, R. Kaiser, I. M. Sokolov, W. Guerin
Phys. Rev. A 103, 023702 (2021), preprint: arXiv:2011.05201

Collective excitation dynamics of a cold atom cloud
A. Cidrim, T. S. do Esperito Santo, J. Schachenmayer, R. Kaiser, R. Bachelard
Phys. Rev. A 101, 013617 (2020), preprint: arXiv:1910.06679

Connecting field and intensity correlations: The Siegert relation and how to test it
D. Ferreira, R. Bachelard, W. Guerin, R. Kaiser, M. Fouché
Am. J. Phys. 88, 831 (2020), preprint: arXiv:2002.05425

Photon blockade with ground-state neutral atoms
A. Cidrim, T. S. do Espirito Santo, J. Schachenmayer, R. Kaiser, R. Bachelard
Phys. Rev. Lett. 125, 073601 (2020), preprint: arXiv:2004.14720