Theory of superfluidity in a polariton system |
| |
Authors: | Yu E Lozovik A G Semenov |
| |
Institution: | (1) Institute of Spectroscopy, RAS, Troitsk, Moscow Oblast, Russia;(2) Lebedev Physical Institute, RAS, Moscow, Russia |
| |
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.
__________
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 154, No. 2, pp. 372–384, February, 2008. |
| |
Keywords: | exciton polariton superfluidity functional integration method Popov approximation |
本文献已被 SpringerLink 等数据库收录! |
|