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arXiv · quant-ph/9908060

Bogoliubov dispersion relation for a "photon fluid": Is this a superfluid?

Raymond Y. Chiao
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Abstract

We discuss the possibility that photons, which are bosons, can form a 2D superfluid due to Bose-Einstein condensation inside a nonlinear Fabry-Perot cavity filled with atoms in their ground states. A "photon fluid" forms inside the cavity as a result of multiple photon-photon collisions mediated by the atoms during a cavity ring-down time. The effective mass and chemical potential for a photon inside this fluid are nonvanishing. This implies the existence of a Bogoliubov dispersion relation for the low-lying elementary excitations of the photon fluid, and in particular, that sound waves exist for long-wavelength, low-frequency disturbances of this fluid. Possible experiments to test for the superfluidity of the photon fluid based on the Landau critical-velocity criterion will be discussed.

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Raymond Y. Chiao. 1999-08-18. Bogoliubov dispersion relation for a "photon fluid": Is this a superfluid?. https://doi.org/10.1016/s0030-4018(99)00615-x

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