| Issue |
EPL
Volume 78, Number 6, June 2007
|
|
|---|---|---|
| Article Number | 67005 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/78/67005 | |
| Published online | 01 June 2007 | |
On the superfluid properties of a polaritonic system
1
P.N. Lebedev Physical Institute - 119991 Moscow, Russia
2
Institute of Spectroscopy - 142190 Troitsk, Moscow Region, Russia
Received:
22
March
2007
Accepted:
8
May
2007
Superfluidity of a two-dimensional system of excitonic polaritons in an optical microcavity with embedded quantum well is considered. By using the effective low-energy action for thermodynamic phase fluctuations we obtain the expression for the analogue of superfluid density in the system in terms of the “current-current” correlation function. The expression for the “current” operator is also derived. Using the Weakly interacting Bose gas approximation we calculate the “superfluid density” in a polaritonic system and discuss the Kosterlitz-Thouless phase transition in the system.
PACS: 71.36.+ – Polaritons (including photon-phonon and photon-magnon interactions) / 71.35.Lk – Collective effects (Bose effects, phase space filling, and excitonic phase transitions) / 67.57.De – Superflow and hydrodynamics
© Europhysics Letters Association, 2007
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