Entanglement and nonclassicality of photon-added two-mode squeezed thermal state

Details Entanglement and nonclassicality of photon-added two-mode squeezed thermal state Entanglement and nonclassicality of photon-added two-mode squeezed thermal state

2012-03-03

arxiv.org/abs/1203.0595v1

Physics

Quantum Physics

11 pages, 7 figures

Scientific paper

We introduce a kind of entangled state---photon-addition two-mode squeezed thermal state (TMSTS) by adding photons to each mode of the TMSTS. Using the P-representation of thermal state, the compact expression of the normalization factor is derived, a Jacobi polynomial. The nonclassicality is investigated by exploring especially the negativity of Wigner function. The entanglement is discussed by using Shchukin-Vogel criteria. It is shown that the photon-addtion to the TMSTS may be more effective for the entanglement enhancement than the photon-subtraction from the TMSTS. In addition, the quantum teleportation is also examined, which shows that symmetrical photon-added TMSTS may be more useful for quantum teleportation than the non-symmetric case.

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