Effect of different inhomogeneous magnetic fields on thermal entanglement in a two-qutrit Heisenberg XYZ chain

Abstract

Abstract:

The quantum entanglement of two-qutrit Heisenberg XYZ chains interacting with different inhomogeneous magnetic fields is investigated by means of negativity. It is found that the quantum phase transition occurs when the system is in the ground state. The behaviors of entanglement in ferromagnetic and anti-ferromagnetic are totally different. So, we can produce entanglement by this feature. We also find that the entanglement behaves oscillator when the external magnetic field becomes inhomogeneous. And the x/y component magnetic fields can induce the entanglement to disappear and then to revive. The dependence of the entanglement on parameters is different with different magnetic field. The entanglement can be controlled by varying the directions of external magnetic field and the anisotropy couplings Jz.

Key words: quantum optics, negativity, qutrit, different inhomogeneous magnetic fields

CLC Number:

QIN Meng, LI Yan-Biao, BAI Zhong. Effect of different inhomogeneous magnetic fields on thermal entanglement in a two-qutrit Heisenberg XYZ chain[J]. J4, 2012, 29(4): 434-440.

References

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Effect of different inhomogeneous magnetic fields on thermal entanglement in a two-qutrit Heisenberg XYZ chain

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