An Ideal Channel of Long Distance Entanglement in Spin Systems

Details An Ideal Channel of Long Distance Entanglement in Spin Systems An Ideal Channel of Long Distance Entanglement in Spin Systems

2007-08-27

arxiv.org/abs/0708.3483v1

Physics

Quantum Physics

Comments are welcome (xxq@xiyou.edu.cn)

Scientific paper

10.1088/0256-307X/25/7/005

We propose a scheme for using spin chain to realize an ideal channel of long distance entanglement. The results show that there has different entanglement in different Hilbert subspace, the anisotropic parameter $\Delta$ will frustrate the entanglement and the magnetic field affect the entanglement through changing the ground state, the boundary entanglement $C_{1N}$ has the simplest expression in the simplest subspace and it only depend on the first item of the ground state, that item can be increased when a local magnetic field is introduced. Our propose can be handled easily because it only needs a uniform XX open chain initialized in the simplest Hilbert subspace and a bulk magnetic field that absent for the boundary qubits.

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