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首页> 外文期刊>Physica, B. Condensed Matter >Propagation of local excitations through strongly correlated quantum chains
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Propagation of local excitations through strongly correlated quantum chains

机译:通过高度相关的量子链传播局部激发

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摘要

The propagation of an external transverse magnetic signal acting locally on a 1d chain of spins generates a disturbance which runs through the system. This quantum effect can be interpreted as a classical travelling wave which contains a superposition of a large set of frequencies depending on the size of the chain. Its local amplitude fixes the size of the z-component of the spins at any location in the chain. The average and maximum value of the group velocity are determined and compared with the transmission velocity fixed by the LiebRobinson upper bound inequality.
机译:局部作用在自旋1d链上的外部横向磁信号的传播会产生干扰,并贯穿系统。可以将这种量子效应解释为经典的行波,其中取决于链的大小,其中包含大量频率的叠加。它的局部振幅将自旋的z分量的大小固定在链中任何位置。确定群速度的平均值和最大值,并将其与由LiebRobinson上限不等式确定的传输速度进行比较。

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