Thermal entanglement of Ising Model with Dzyaloshinskii-Moriya interaction in an inhomogeneous magnetic field*

Abstract

Abstract:

Taking the effect of Dzyaloshinskii-Moriya (DM) interaction into account, the entanglement of a two-qubit Ising model in an inhomogeneous magnetic field is investigated by means of negativity theory. It is shown that the existence of DM interaction can obviously enhance the entanglement and put it into a maximum while the magnetic field reduces the entanglement. In addition, low temperature also plays a positive role in entanglement. Moreover, the inhomogeneous magnetic field is also investigated. These effects indicate that one can control the thermal entanglement by manipulation of DM interaction, the uniform and inhomogeneous magnetic field and the temperature.

Key words: quantum optics, quantum entanglement, ising model, DM interaction, negativity theory

CLC Number:

O431.2

HU Ji, FANG Jian-Xin, QIAN Li, HE Dai-Guo. Thermal entanglement of Ising Model with Dzyaloshinskii-Moriya interaction in an inhomogeneous magnetic field*[J]. J4, 2011, 28(3): 329-334.

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