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arXiv · 2409.16771

Finite-size effects in two-photon correlations of exciton Bose-Einstein condensates

R. D. Ivanovskikh·I. L. Kurbakov·N. A. Asriyan·Yu. E. Lozovik
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Abstract

Accessing two-photon statistics via Hunbary Brown and Twiss (HBT)-type measurements is essential for investigations of excitonic Bose-condensates. In this paper we make use of quantum hydrodynamics in order to study the finite-size impact on the two-photon emission intensity of a 2D condensate of excitons. We use the developed approach to calculate the two-photon decay time of exciton condensate in GaAs quantum wells and MoS$_2$ bilayers. We demonstrate that the registered signal scales on the sample size in a qualitatively different manner than the Bogoliubov theory predicts.

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R. D. Ivanovskikh, I. L. Kurbakov, N. A. Asriyan, Yu. E. Lozovik. 2024-09-25. Finite-size effects in two-photon correlations of exciton Bose-Einstein condensates. https://doi.org/10.1103/physrevb.111.125306

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