## Thermal effects on bipartite and multipartite correlations in fiber coupled cavity arrays |

JOSA B, Vol. 31, Issue 5, pp. 1126-1131 (2014)

http://dx.doi.org/10.1364/JOSAB.31.001126

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### Abstract

We investigate the thermal influence of fibers on the dynamics of bipartite and multipartite correlations in fiber coupled cavity arrays where each cavity is resonantly coupled to a two-level atom. The atom-cavity systems connected by fibers can be considered as polaritonic qubits. We first derive a master equation to describe the evolution of the atom-cavity systems. The bipartite (multipartite) correlations are measured by concurrence and discord (spin squeezing). Then, we solve the master equation numerically and study the thermal effects on the concurrence, discord, and spin squeezing of the qubits. On the one hand, at zero temperature, there are steady state bipartite and multipartite correlations. On the other hand, the thermal fluctuations of a fiber may block the generation of entanglement of two qubits connected directly by the fiber, while the discord can be generated and stored for a long time. This thermal-induced blockade effects of bipartite correlations may be useful for quantum information processing. The bipartite correlations of a longer chain of qubits is more robust than a shorter one in the presence of thermal fluctuations.

© 2014 Optical Society of America

**OCIS Codes**

(270.2500) Quantum optics : Fluctuations, relaxations, and noise

(270.5585) Quantum optics : Quantum information and processing

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: January 14, 2014

Revised Manuscript: March 18, 2014

Manuscript Accepted: March 23, 2014

Published: April 21, 2014

**Citation**

Jian-Song Zhang and Ai-Xi Chen, "Thermal effects on bipartite and multipartite correlations in fiber coupled cavity arrays," J. Opt. Soc. Am. B **31**, 1126-1131 (2014)

http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-5-1126

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