Creation of pure multi-mode entangled states in a ring cavity

OPTICS COMMUNICATIONS

卷:283

Article

Li, Gao-xiang²  Ficek, Zbigniew¹ 

[1] KACST, Natl Ctr Math & Phys, Riyadh 11442, Saudi Arabia

[2] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China

关键词: Entanglement;    Continuous variables;    Squeezed states;   

DOI  :  10.1016/j.optcom.2009.10.053

来源: Elsevier

【 摘 要 】

Practical schemes for creation of multi-mode squeezed (entangled) states of atomic ensembles located inside a high-Q ring cavity are discussed. it is assumed that the cavity is composed of two degenerate mutually counter-propagating modes that can simultaneously couple to the atomic ensembles with the same coupling strengths. The ensembles are composed of ultra-cold atoms which are modeled as four-level systems driven by two laser fields, both co-propagating with one of the cavity directions. We illustrate a procedure that constructs multi-mode squeezed states from the vacuum by a unitary transformation associated with the collective dynamics of the atomic ensembles subjected to driving lasers of a suitably adjusted amplitudes and phases. The lasers pulses together with the cavity dissipation prepare the collective modes in a desired stationary squeezed state. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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