Optomechanical signature of a frictionless flow of superfluid light

Year: 2015

Authors: Larre PE., Carusotto I.

Autors Affiliation: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy;‎ Univ Trento, Dipartimento Fis, I-38123 Povo, Italy

Abstract: We propose an experimental setup that should make it possible to reveal the frictionless flow of a superfluid of light from the suppression of the drag force that it exerts on a material obstacle. In the paraxial-propagation geometry considered here, the photon-fluid dynamics is described by a wave equation analogous to the Gross-Pitaevskii equation of dilute Bose-Einstein condensates and the obstacle consists in a solid dielectric slab immersed into a nonlinear optical liquid. By means of an ab initio calculation of the electromagnetic force experienced by the obstacle, we anticipate that superfluidity is detectable in state-of-the-art experiments from the disappearance of the optomechanical deformation of the obstacle.

Journal/Review: PHYSICAL REVIEW A

Volume: 91 (5)      Pages from: 053809-1  to: 053809-10

KeyWords: BOGOLIUBOV DISPERSION-RELATION; CRITICAL VELOCITY; LIQUID-HELIUM; CONDENSATION; OBSTACLE
DOI: 10.1103/PhysRevA.91.053809

Citations: 16
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