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

Abstract

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.

"Quo vadis Quantum Optics"- special issue of Optics Communications memory of Krzysztof Wodkiewicz

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Cited by in corpus (5)

• Robust entanglement generation by reservoir engineering
• Unified generation and fast emission of arbitrary single-photon multimode $W$ states
• Continuous variables approach to entanglement creation and processing
• Generating coherence and entanglement with a finite-size atomic ensemble in a ring cavity
• Diffractions of Bose-Einstein Condensate in Quantized Light Fields