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Zhang, Hao-Liang; Hu, Yin-Quan; Jia, Fang; Hu, Li-Yun

Entanglement of photon-subtracted two-mode squeezed thermal state and its decoherence in thermal environments. (English) Zbl 1298.81031

Int. J. Theor. Phys. 53, No. 6, 2091-2107 (2014).
Summary: Using a non-Gaussian operation – photon subtraction from two-mode squeezed thermal state (PS-TMSTS), we construct a kind of entangled state. A Jacobi polynomial is found to be related to the normalization factor. The negativity of Wigner function (WF) is used to discuss its nonclassicality. The investigated entanglement properties turn out that the symmetrical PS-TMSTS may be more effective than the non-symmetric for quantum teleportation. Then the time evolution of WF is used to examine the decoherence effect, which indicates that the characteristic time of single PS-TMSTS depends not only on the average photon number of environment, but also on the average photon number of thermal state and the squeezing parameter.

MSC:

81P40 Quantum coherence, entanglement, quantum correlations
81V80 Quantum optics
81S22 Open systems, reduced dynamics, master equations, decoherence
81R30 Coherent states

Keywords:

non-Gaussian operation; photon subtraction; two-mode squeezed thermal state; decoherence
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