2009/05/31 by Gaël Nardin, G. Nardin, K. G. Lagoudakis +13
Physics and Astronomy · #Bose–Einstein condensate #Coherence (philosophical gambling strategy) #Coherence length #Coherence time #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Exciton #Field (mathematics) #Materials science #Physics #Picosecond #Polariton #Population #Quantum and electron transport phenomena #Quantum mechanics #Range (aeronautics) #Scattering #Statistical physics #Stochastic dynamics #Strong Light-Matter Interactions #cond-mat.other #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevlett.103.256402
published as Phys. Rev. Lett. 103, 256402 (2009) · 7 pages, 4 figures
arxiv created 2009/11/09 · openalex publication_date 2009/12/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on time-resolved measurements of the first order spatial coherence in an exciton-polariton Bose-Einstein condensate. Long-range spatial coherence is found to set in right at the onset of stimulated scattering, on a picosecond time scale. The coherence reaches its maximum value after the population and decays slowly, staying up to a few hundred picoseconds. This behavior can be qualitatively reproduced, using a stochastic classical field model describing interaction between the polariton condensate and the exciton reservoir within a disordered potential.