Thermal entanglement of spins in an inhomogeneous magnetic field
Thermal entanglement of spins in an inhomogeneous magnetic field
复制标题
DOI：
10.1103/physreva.71.022308
复制
发表时间：
2005-02-01
影响因子：
2.9
通讯作者：
Karimipour, V
中科院分区：
文献类型：
--
作者：
Asoudeh, M;Karimipour, V
研究了磁场的不均匀性对双自旋系统热纠缠的影响。我们表明，在铁磁的情况下，一个非常小的不均匀性是能够产生大的值的热纠缠。这表明铁磁海森堡系统中没有纠缠对于磁场的不均匀性是高度不稳定的，这在任何量子比特的固态实现中都不可避免地存在。
We study the effect of inhomogeneities in the magnetic field on the thermal entanglement of a two-spin system. We show that in the ferromagnetic case a very small inhomogeneity is capable of producing large values of thermal entanglement. This shows that the absence of entanglement in the ferromagnetic Heisenberg system is highly unstable against inhomogeneity of magnetic fields, which is inevitably present in any solid state realization of qubits.