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Chin. Phys. B, 2012, Vol. 21(10): 100305    DOI: 10.1088/1674-1056/21/10/100305
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A new bipartite entangled state describing the parametric down-conversion process and its applications in quantum optics

Meng Xiang-Guoa, Wang Ji-Suoa b, Zhang Xiao-Yanc
a Department of Physics, Liaocheng University, Liaocheng 252059, China;
b Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
c Department of Physics, Heze University, Heze 274015, China
Abstract  We construct a new bipartite entangled state (NBES), which describes both the squeezing and the entanglement involved in the parametric down-conversion process and can be produced using a symmetric beam splitter. Constructing asymmetric ket-bra integrations based on the NBES leads to some new squeezing operators, which clearly exhibit the relationships between squeezing and entangled state transformations. Moreover, an entangled Wigner operator with a definite physical meaning is also presented.
Keywords:  new bipartite entangled state      quantum optics      beam splitter      squeezing operator      entangled Wigner operator     
Received:  16 February 2012      Published:  01 September 2012
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  42.79.Fm (Reflectors, beam splitters, and deflectors)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11147009), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2010AQ027 and ZR2012AM004), and the Shandong Provincial Higher Educational Science and Technology Program, China (Grant No. J10LA15).
Corresponding Authors:  Meng Xiang-Guo     E-mail:  mengxiangguo1978@sina.com

Cite this article: 

Meng Xiang-Guo, Wang Ji-Suo, Zhang Xiao-Yan A new bipartite entangled state describing the parametric down-conversion process and its applications in quantum optics 2012 Chin. Phys. B 21 100305

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