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Chinese Physics, 2007, Vol. 16(8): 2237-2243    DOI: 10.1088/1009-1963/16/8/014
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The separability of two-mode Gaussian state under amplification and symmetric damping

Chen Xiao-Yu (陈小余)a), Jiang Li-Zhen (蒋丽珍)a), and Wu Liang-Neng (邬良能)b)
a College of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; b College of Science, China Institute of Metrology, Hangzhou 310034, China
Abstract  The performances of a two-mode Gaussian state under parametric amplification, symmetric amplitude damping and thermal noise are studied. The time-dependent complex correlation matrix of the state in evolution is given. The separability of the final two-mode Gaussian state is examined under symmetric amplification and asymmetric amplification separately.
Keywords:  parametric amplifier      amplitude damping      characteristic function      separability  
Received:  11 October 2006      Revised:  06 March 2007      Accepted manuscript online: 
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  05.40.Ca (Noise)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10575092), the Zhejiang Province Natural Science Foundation (Grant No RC104265) and General Administration of Quality Supervision,Inspection and Quarantine of China (Grant No

Cite this article: 

Chen Xiao-Yu (陈小余), Jiang Li-Zhen (蒋丽珍), and Wu Liang-Neng (邬良能) The separability of two-mode Gaussian state under amplification and symmetric damping 2007 Chinese Physics 16 2237

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