William Guerin

I'm a member of the cold-atom team since 2012 and the head of the team since July 2024.

Main current projects:

• Cold atoms in 1D lattices: photonic and quantum properties (since 2022)
• Intensity correlations for astrophysics (since 2015) 

• Super- and subradiance in dilute and disordered cold atomic samples (2013-2022)
• Random laser in cold atoms (2007-2016)
• Photonic band gaps and DFB lasing in cold atoms (2010-2012, at Tübingen University)
• Lévy flights of light in hot vapors (2008-2009)
• Bose-Einstein condensation and atom laser (2003-2007, at Institut d'Optique)

Personal information: born 1^st November 1980 ; one child.

Education:

• 2020: Habilitation in physics, Université Côte d'Azur (Nice, France).
• 2007: PhD in physics, Université Paris-Sud (Orsay, France). Doctoral advisor: Alain Aspect.
• 2003: Master degree "Optics and photonics", Université Paris-Sud (Orsay, France).
• 2003: Engineering degree from Institut d’Optique (Palaiseau, France).

• Since Oct. 2012: CNRS Research Associate at INPHYNI (formerly INLN).
• Jan. 2010 – Aug. 2012: Post-doc (project leader) at Tübingen University (Germany) in the group of Claus Zimmermann. Fellow of the Alexander von Humboldt Foundation.
• June 2007 – Sept. 2009: Post-doc at INLN in the group of Robin Kaiser.
• Oct. 2003 – May 2007: Graduate student at Institut d'Optique (Palaiseau, France) in the group of Alain Aspect and Philippe Bouyer.

• 2022: Research grant of the French National Research Agency (ANR), project "Novel approaches for light-matter interfaces with 1D ordered atomic ensembles" (1DOrder) (co-PI, 155 k€ for our team).
• 2020: Research grant of the French National Research Agency (ANR), project "Intensity Interferometry at Calern" (I2C) (PI of the consortium, 409 k€ in total, 227 k€ for our team).
• 2017: Research grant of Université Côte d'Azur (IDEX), project "Intensity Correlations: from Atoms to Stars" (28 k€).
• 2012: Post-doc grant of the Carl Zeiss Foundation (160 k€ for two years). I declined to take the CNRS position.
• 2009: Post-doc grant of the Alexander von Humboldt Foundation (two years: 2010 – 2011).
• 2003: PhD grant of the DGA (three years: 2003 – 2006).

For citation data, see my author page on Web Of Science.

Proceedings are included only if they contain original material not published otherwise.

Go directly to 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005.

2024:

• Increasing the sensitivity of stellar intensity interferometry with optical telescopes: frist laboratory test of spectral multiplexing
  S. Tolila, G. Labeyrie, R. Kaiser, J.-P. Rivet, W. Guerin
  Proceedings of the annual meeting of the French Society of Astronomy & Astrophysics, in press (SF2A, 2024), preprint: arXiv:2411.08417

2023:

• Super- and subradiance in dilute disordered cold atomic samples: observations and interpretations
  W. Guerin
  in Advances in Atomic, Molecular and Optical Physics, vol. 72, 2023, pages 253-296
  Edited by L. DiMauro, H. Perrin, and S. Yelin (Elsevier)
  Preprint: arXiv:2306.02891 
   
• Intensity interferometry observations of the Hα envelope of γ Cas with MéO and a portable telescope
  N. Matthews, J.-P. Rivet, D. Vernet, M. Hugbart, G. Labeyrie, R. Kaiser, J. Chabé, C. Courde, O. Lai, F. Vakili, O. Garde, W. Guerin
  Astron. J. 167, 117 (2023), preprint: arXiv:2301.04878

2022:

• Optical interpretation of linear-optics superradiance and subradiance
  S. Asselie, A. Cipris, W. Guerin
  Phys. Rev. A 106, 063712 (2022), preprint: arXiv:2209.00918
   
• 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, M. Hugbart
  Eur. Phys. J. D 76, 246 (2022), preprint: arXiv:2209.06480
   
• Intensity interferometry at Calern and beyond: progress report
  N. Matthews, J.-P. Rivet, M. Hugbart, G. Labeyrie, R. Kaiser, O. Lai, F. Vakili, D. Vernet, J. Chabé, C. Courde, N. Schuhler, P. Bourget, W. Guerin
  Proc. SPIE 12183, Optical and Infrared Interferometry and Imaging VIII, 121830G (2022), preprint: arXiv:2209.02477 
   
• Combined spectroscopy and intensity interferometry to determine the distances of the blue supergiants P Cygni and Rigel
  E. S. G. de Almeida, M. Hugbart, A. Domiciano de Souza, J.-P. Rivet, F. Vakili, A. Siciak, G. Labeyrie, O. Garde, N. Matthews, O. Lai, D. Vernet, R. Kaiser, W. Guerin
  MNRAS 515, 1 (2022), preprint: arXiv:2204.00372  

2021:

• Revival of intensity interferometry with modern photonic technologies
  W. Guerin, J.-P. Rivet, M. Hugbart, F. Vakili, E. S. G. de Almeida, A. Domiciano de Souza, G. Labeyrie, N. Matthews, O. Lai, P.-M. Gori, D. Vernet, J. Chabé, C. Courbe, E. Samain, B. V. Castilho, A. M. Magalhaes, E. Janot-Pacheco, A. Carciofi, P. Bourget, N. Schuhler, R. Kaiser
  Proceedings of the annual meeting of the French Society of Astronomy & Astrophysics, p. 331 (SF2A, 2021)
   
• 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
   
• I3T: Intensity Interferometry Imaging Telescope
  P.-M. Gori, F. Vakili, J.-P. Rivet, W. Guerin, M. Hugbart, A. Chiavassa, A. Vakili, R. Kaiser, G. Labeyrie
  MNRAS 505, 2328 (2021), preprint: arXiv:2105.07072
   
• 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 

• 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 
   
• A comparison of g⁽¹⁾(t), g^(3/2)(t) and g⁽²⁾(t) for radiation from harmonic oscillators in Brownian motion with a coherent background
  A. Siciak, M. Hugbart, W. Guerin, R. Kaiser, L. A. Orozco
  Phys. Scr. 95, 104001 (2020), preprint: arXiv:2007.06470 
   
• Intensity interferometry of P Cygni in the Hα emission line: towards distance calibration of LBV supergiant stars
  J.-P. Rivet, A. Siciak, E. S. G. de Almeida, F. Vakili, A. Domiciano de Souza, M. Fouché, O. Lai, D. Vernet, R. Kaiser, W. Guerin
  Mon. Not. Roy. Astron. Soc. 494, 218 (2020), preprint: arXiv:1910.08366 
   
• Mirrorless lasing and cooperative scattering with cold atoms
  William Guerin 
  Habilitation thesis, Université Côte d'Azur, 2020 (Nice, France)
  Reprint: tel-02924393
   
• Optical-depth scaling of light scattering from a dense and cold atomic 87Rb gas
  K. J. Kemp, S. J. Roof, M. D. Havey, I. M. Sokolov, D. V. Kupriyanov, W. Guerin
  Phys. Rev. A 101, 033832 (2020), preprint: arXiv:1807.10939
   
• Collective excitation dynamics of a cold-atom cloud
  T. S. do Espirito Santo, P. Weiss, A. Cipris, R. Kaiser, W. Guerin, R. Bachelard, J. Schachenmayer 
  Phys. Rev. A 101, 013617 (2020), preprint: arXiv:1910.06679 
  Editors' suggestion

• Collective Multi-mode Vacuum Rabi Splitting
  W. Guerin, T. S. do Espirito Santo, P. Weiss, A. Cipris, J. Schachenmayer, R. Kaiser, R. Bachelard
  Phys. Rev. Lett. 123, 243401 (2019), preprint: arXiv:1909.06454 
   
• Robustness of Dicke subradiance against thermal decoherence
  P. Weiss, A. Cipris, M. O. Araújo, R. Kaiser, W. Guerin
  Phys. Rev. A 100, 033833 (2019), preprint: arXiv:1906.02918 
   
• Dressed dense atomic gases
  I. Lesanovsky, B. Olmos, W. Guerin, R. Kaiser
  Phys. Rev. A 100, 021401(R) (2019), preprint: arXiv:1902.02989 
   
• Comparison of three approaches to light scattering by dilute cold atomic ensembles
  I. M. Sokolov, W. Guerin
  J. Opt. Soc. Am. B 36, 2030 (2019), preprint: arXiv:1902.04289 

• Intensity interferometry revival on the Côte d'Azur
  O. Lai, W. Guerin, F. Vakili, R. Kaiser, J.-P. Rivet, M. Fouché, G. Labeyrie, J. Chabé, C. Courde, E. Samain, D. Vernet
  Proc. SPIE 10701, Interferometry and Imaging VI, 1070121 (2018), preprint: arXiv:1810.0823
   
• Optical long baseline intensity interferometry: prospects for stellar physics
  J.-P. Rivet, F. Vakili, O. Lai, D. Vernet, M. Fouché, W. Guerin, G. Labeyrie, R. Kaiser
  Exp. Astron. 46, 531 (2018) [free link for online reading], preprint: arXiv:1805.06078
   
• Spatial intensity interferometry on three bright stars
  W. Guerin, J.-P. Rivet, M. Fouché, G. Labeyrie, D. Vernet, F. Vakili, R. Kaiser
  Mon. Not. Roy. Astron. Soc. 480, 245 (2018), preprint: arXiv:1805.06653
   
• Subradiance and radiation trapping in cold atoms
  P. Weiss, M. O. Araújo, R. Kaiser, W. Guerin
  New J. Phys. 20, 063024 (2018), preprint: arXiv:1803.01646 
   
• Diffusing-wave spectroscopy of cold atoms in ballistic motion
  A. Eloy, Z. Yao, R. Bachelard, W. Guerin, M. Fouché, R. Kaiser
  Phys. Rev. A 97, 013810 (2018), preprint: arXiv:1710.03974 
   
• Decay dynamics in the coupled-dipole model
  M. O. Araújo, W. Guerin, R. Kaiser
  J. Mod. Opt. 65, 1345 (2018) [link for 50 free copies], preprint: arXiv:1705.02190

• Temporal intensity interferometry: photon bunching on three bright stars
  W. Guerin, A. Dussaux, M. Fouché, G. Labeyrie, J.-P. Rivet, D. Vernet, F. Vakili, R. Kaiser
  Mon. Not. Roy. Astron. Soc. 472, 4126 (2017), preprint: arXiv:1708.06119
   
• Population of collective modes in light scattering by many atoms
  W. Guerin, R. Kaiser
  Phys. Rev. A 95, 053865 (2017), preprint: arXiv:1702.01053
   
• Light interacting with atomic ensembles: collective, cooperative and mesoscopic effects
  W. Guerin, M. T. Rouabah, R. Kaiser
  J. Mod. Opt. 64, 895 (2017) [link for 50 free copies], preprint: arXiv:1605.02439

• Noise spectroscopy with large clouds of cold atoms
  S. Vartabi Kashanian, A. Eloy, W. Guerin, M. Lintz, M. Fouché, R. Kaiser
  Phys. Rev. A 94, 043622 (2016), preprint: arXiv:1606.07658
   
• Collective effects in the radiation pressure force
  R. Bachelard, N. Piovella, W. Guerin, R. Kaiser
  Phys. Rev. A 94, 033836 (2016), preprint: arXiv:1607.01157
   
• Diffusive to quasi-ballistic random laser: incoherent and coherent models
  W. Guerin, Y. D. Chong, Q. Baudouin, M. Liertzer, S. Rotter, R. Kaiser
  J. Opt. Soc. Am. B 33, 1888 (2016), preprint: arXiv:1606.03679
  Editors' Pick
   
• Superradiance in a large and dilute cloud of cold atoms in the linear-optics regime
  M. O. Araújo, I. Krešić, R. Kaiser, W. Guerin
  Phys. Rev. Lett. 117, 073002 (2016), preprint: arXiv:1603.07204
   
• Temporal intensity correlation of light scattered by a hot atomic vapor
  A. Dussaux, T. Passerat de Silans, W. Guerin, O. Alibart, S. Tanzilli, F. Vakili, R. Kaiser
  Phys. Rev. A 93, 043826 (2016), preprint: arXiv:1601.00853
   
• Subradiance in a Large Cloud of Cold Atoms
  W. Guerin, M. O. Araújo, R. Kaiser
  Phys. Rev. Lett. 116, 083601 (2016), preprint: arXiv:1509.00227
  PRL Editors' Suggestion; see also: Storing Light in the Dark, by A. Carmele, Physics 9, 20 (2016)
  Press: Brazilian Physical Society, INP CNRS