Cavity Quantum Electrodynamics of Continuously Monitored Bose-Condensed Atoms

Atoms

Mark D. Lee²  Janne Ruostekoski¹  Jonathan Goldwin² 

[1] Mathematical Sciences, University of Southampton, Southampton SO17 1BJ, UK; E-Mail

关键词: ultracold atoms;    cavity quantum electrodynamics;    Bose–Einstein condensates;    cavity optomechanics;    phonon detection;    continuous quantum measurement;   

DOI  :  10.3390/atoms3030450

来源: mdpi

【 摘 要 】

We study cavity quantum electrodynamics of Bose-condensed atoms that are subjected to continuous monitoring of the light leaking out of the cavity. Due to a given detection record of each stochastic realization, individual runs spontaneously break the symmetry of the spatial profile of the atom cloud and this symmetry can be restored by considering ensemble averages over many realizations. We show that the cavity optomechanical excitations of the condensate can be engineered to target specific collective modes. This is achieved by exploiting the spatial structure and symmetries of the collective modes and light fields. The cavity fields can be utilized both for strong driving of the collective modes and for their measurement. In the weak excitation limit the condensate–cavity system may be employed as a sensitive phonon detector which operates by counting photons outside the cavity that have been selectively scattered by desired phonons.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.