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Well-protected quantum state transfer in a dissipative spin chain

机译:保护型旋转链中受良好的量子状态转移

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In this work, a mechanism is investigated for improving the quantum state transfer efficiency in a spin chain, which is in contact with a dissipative structured reservoir. The efficiency of the method is based on the addition of similar non-interacting auxiliary chains into the reservoir. In this way, we obtain the exact solution for the master equation of the spin chain in the presence of dissipation. It is found out that entering more auxiliary chains into the reservoir causes, in general, the better improvement of the fidelity of state transfer along the mentioned chain. Furthermore, it is reveal that the protocol has better efficiency for a chain with longer length. Therefore, by this method, quantum state transfer along a linear chain with an arbitrary number of qubits, can be well-protected against the dissipative noises.
机译:在这项工作中,研究了一种机构以改善旋转链中的量子状态转移效率,其与耗散结构储存器接触。该方法的效率基于将类似的非交互辅助链添加到储存器中。通过这种方式,我们在耗散情况下获得旋转链的主方程的精确解决方案。发现更多的辅助链进入储层的原因,一般而言,更好地改善了沿着所提到的链的国家转移的保真度。此外,揭示了该协议具有更长长度的链具有更好的效率。因此,通过该方法,沿着具有任意数量的Qubits的线性链的量子状态转移,可以抵抗耗散噪声良好地保护。

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