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Entropy 2019, 21(4), 402;

Stabilization of All Bell States in a Lossy Coupled-Cavity Array

Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China
Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
Author to whom correspondence should be addressed.
Received: 7 February 2019 / Revised: 13 April 2019 / Accepted: 14 April 2019 / Published: 16 April 2019
(This article belongs to the Collection Quantum Information)
PDF [1469 KB, uploaded 16 April 2019]


A scheme is proposed to generate maximally entangled states of two Λ -type atoms trapped in separate overdamped optical cavities using quantum-jump-based feedback. This proposal can stabilize not only the singlet state, but also the other three triplet states by alternating the detuning parameter and relative phase of the classical fields. Meanwhile it is convenient to manipulate atoms, and much more robust against spontaneous emission of atoms. The parameters related to the potential experiment are analyzed comprehensively and it is confirmed that the quantum feedback technology is a significant tool for entanglement production with a high fidelity. View Full-Text
Keywords: Bell state; quantum-jump-based feedback; dissipative dynamics Bell state; quantum-jump-based feedback; dissipative dynamics

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Liu, B.; Li, D.-X.; Shao, X.-Q. Stabilization of All Bell States in a Lossy Coupled-Cavity Array. Entropy 2019, 21, 402.

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