Quantum entanglement and nonlocality properties of two-mode Gaussian squeezed states |
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| Authors: | Xiang Shao-Hu Shao Bin and Song Ke-Hui |
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| Institution: | Department of Physics, Beijing Institute of Technology, Beijing 100081, China; Research Institute of Information Science, Huaihua University, Huaihua 418008, China; Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China |
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| Abstract: | Quantum entanglement and nonlocality properties of a family of
two-mode Gaussian pure states have been investigated. The results
show that the entanglement of these states is determined by both the
two-mode squeezing parameter and the difference of the two
single-mode squeezing parameters. For the same two-mode squeezing
parameter, these states show larger entanglement than the usual
two-mode squeezed vacuum state. The violation of Bell inequality
depends strongly on all the squeezing parameters of these states and
disappears completely in the limit of large squeezing. In
particular, these states can exhibit much stronger violation of
local realism than two-mode squeezed vacuum state in the range of
experimentally available squeezing values. |
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| Keywords: | entanglement nonlocality Gaussian state |
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