Opto-mechanical effects in superradiant light scattering by Bose-Einstein condensate in a cavity

TL;DR

This paper explores how a movable mirror in an optical cavity affects superradiant light scattering from a Bose-Einstein condensate, revealing controllable regimes and enhancement effects linked to mirror dynamics.

Contribution

It demonstrates the influence of mirror motion on superradiant scattering and identifies conditions for regime switching and enhanced scattering via mechanical effects.

Findings

Mirror motion affects cavity-pump detuning dynamically.

Pump intensity controls transition between superradiant and Bragg regimes.

Resolved side band regime enhances superradiant scattering.

Abstract

We investigate the effects of a movable mirror (cantilever) of an optical cavity on the superradiant light scattering from a Bose-Einstein condensate (BEC) in an optical lattice. We show that the mirror motion has a dynamic dispersive effect on the cavity-pump detuning. Varying the intensity of the pump beam, one can switch between the pure superradiant regime and the Bragg scattering regime. The mechanical frequency of the mirror strongly influences the time interval between two Bragg peaks. We found that when the system is in the resolved side band regime for mirror cooling, the superradiant scattering is enhanced due to coherent energy transfer from the mechanical mirror mode to the cavity field mode.