论文标题
沿着自旋1/2链的0阶连贯矩阵的转移
Transfer of 0-order coherence matrix along spin-1/2 chain
论文作者
论文摘要
在这项工作中，我们研究了连贯矩阵沿着各种长度的自旋1/2链的传递。与高阶相干矩阵不同，如果其元素正确固定，则可以完美地传递0阶相干矩阵。在某些情况下，为了提供完美的转移，必须将扩展的接收器与优化的统一转换一起包含在协议中。在这项工作中，考虑了无限长链的渐近传递的0阶连贯矩阵，并且研究了完全传递的状态与该渐近状态的偏差，作为链长的链长，用于扩展接收器的各种尺寸。还通过使用扩展接收器的单一转换来考虑并优化了通过0阶连贯矩阵的非对角元素传递任意参数转移的问题。
In this work, we study transfer of coherence matrices along spin-1/2 chains of various length. Unlike higher order coherence matrices, 0-order coherence matrix can be perfectly transferred if its elements are properly fixed. In certain cases, to provide the perfect transfer, an extended receiver together with optimized its unitary transformation has to be included into the protocol. In this work, the asymptotic perfectly transferable 0-order coherence matrix for an infinitely long chain is considered and deviation of a perfectly transferred state from this asymptotic state is studied as a function of the chain length for various sizes of the extended receiver. The problem of arbitrary parameter transfer via the nondiagonal elements of the 0-order coherence matrix is also considered and optimized using the unitary transformation of the extended receiver.
