2015/09/01 by J. El Qars, Jamal El Qars, M. Daoud +1
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Computer science #Covariance matrix #Dephasing #Gaussian #Mathematics #Mechanical and Optical Resonators #Mechanical system #Neural Networks and Reservoir Computing #Physics #Quantum #Quantum Information and Cryptography #Quantum discord #Quantum entanglement #Quantum mechanics #Quantum nonlocality #Statistical physics #quant-ph
paper · pdf · doi:10.1142/s0219749915500410
published as International Journal of Quantum Information, Vol. 13, No. 6 (2015) 1550041 · 17 pages
crossref issued 2015/09/01 · crossref published 2015/09/01 · crossref published-print 2015/09/01 · openalex publication_date 2015/09/01 · crossref created 2015/09/18 · crossref published-online 2015/11/30 · arxiv created 2015/12/08 · arxiv updated 2015/12/09 · openalex created_date 2016/06/24 · crossref deposited 2019/08/06 · crossref indexed 2026/08/03 · openalex updated_date 2026/08/05
In this paper, we investigate the robustness of the quantum correlations against the environment effects in various opto-mechanical bipartite systems. For two spatially separated opto-mechanical cavities, we give analytical formula for the global covariance matrix involving two mechanical modes and two optical modes. The logarithmic negativity as an indicator of the degree of entanglement and the Gaussian quantum discord which is a witness of quantumness of correlations are used as quantifiers to evaluate the different pairwise quantum correlations in the whole system. The evolution of the quantum correlations existing in this opto-mechanical system are analyzed in terms of the thermal bath temperature, squeezing parameter and the opto-mechanical cooperativity. We find that with desirable choice of these parameters, it is possible either to enhance or annihilate the quantum correlations in the system. Various scenarios are discussed in detail.