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Theory of superfluidity in a polariton system

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Abstract

We consider the superfluidity properties of a two-dimensional system of polaritons in an optical cavity. Deriving an expression for the effective low-energy action for thermodynamic phase fluctuations, we simultaneously obtain the expression for an analogue of superfluid density in the system in terms of the current-current correlation function and also find the expression for the current operator. We describe the Bogoliubov approximation for a polariton system and calculate the superfluid density. We discuss the Berezinskii-Kosterlitz-Thouless transition in the system under study.

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Authors and Affiliations

  1. Institute of Spectroscopy, RAS, Troitsk, Moscow Oblast, Russia

    Yu. E. Lozovik

  2. Lebedev Physical Institute, RAS, Moscow, Russia

    A. G. Semenov

Authors
  1. Yu. E. Lozovik
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  2. A. G. Semenov
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Correspondence to Yu. E. Lozovik.

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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 154, No. 2, pp. 372–384, February, 2008.

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Lozovik, Y.E., Semenov, A.G. Theory of superfluidity in a polariton system. Theor Math Phys 154, 319–329 (2008). https://doi.org/10.1007/s11232-008-0030-y

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  • DOI: https://doi.org/10.1007/s11232-008-0030-y

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