2009/07/31 by Gao‐xiang Li, Gao-xiang Li, Z. Ficek +1
Chemistry · Computer Science · Physics and Astronomy · #Atomic physics #Chemistry #Coherent states #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Degenerate energy levels #Dissipation #Laser #Materials science #Mode (computer interface) #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Ring (chemistry) #Squeezed coherent state #Unitary state #quant-ph
paper · pdf · doi:10.1016/j.optcom.2009.10.053
published as Optics Commun. 283 (2010) 814 · "Quo vadis Quantum Optics"- special issue of Optics Communications memory of Krzysztof Wodkiewicz
openalex publication_date 2009/11/06 · arxiv created 2010/02/01 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.