Thermal effects on the sudden changes and freezing of correlations between remote atoms in cavity QED network

Abstract

We investigate the thermal effects on the sudden changes and freezing of the quantum and classical correlations of remote qubits in a cavity quantum electrodynamics (CQED) network with losses. We find that the detrimental effect of the thermal reservoirs on the system can be compensated via an efficient coupling of the fiber connecting the two cavities of the system. Furthermore, for certain initial conditions, we find a double sudden transitions in the dynamics of Bures geometrical quantum discord. The second transition tends to disappear at a critical temperature, hence freezing the discord. Finally, we discuss some ideas of the experimental realization of the present proposal.

10 pages, 3 figures. The comments and suggestions are welcome

References in corpus (4)

• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Classical and quantum correlations under decoherence
• Distributed quantum computation via optical fibres
• Microscopic derivation of the Jaynes-Cummings model with cavity losses

Cited by in corpus (6)

• Unifying approach to the quantification of bipartite correlations by Bures distance
• Relating the Bures measure to the Cauchy two-matrix model
• Selftrapping triggered by losses in cavity QED
• Quantum Correlations in Cavity QED Networks
• The sudden change phenomenon of quantum discord
• Generation of phonon quantum states and quantum correlations among single photon emitters in hexagonal boron nitride