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arXiv quant-ph/0612074quant-ph
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脉冲磁场中含自旋链的量子混沌

Quantum chaos with spin-chains in pulsed magnetic fields

T. Boness, M. M. A. Stocklin, T. S. Monteiro

摘要:

最近,人们发现,海森堡自旋链的动力学受到一系列周期脉冲从外部,抛物,磁场可以有一个密切的对应关系量子踢转子(QKR)。QKR是量子混沌的一个关键范例;它的经典极限是众所周知的标准映射。结果发现,一个单一的自旋激发可以转换成一对非色散,反向传播的自旋相干态相当于标准映射的加速器模式。在这里,我们考虑如何其他类型的量子混沌系统,如一个双踢量子转子或量子转子与双势阱可能实现的自旋链,我们讨论的可能性,关于操纵的单磁振子自旋波。

英文摘要:

Recently it was found that the dynamics in a Heisenberg spin-chain subjected to a sequence of periodic pulses from an external, parabolic, magnetic field can have a close correspondence with the quantum kicked rotor (QKR). The QKR is a key paradigm of quantum chaos; it has as its classical limit the well-known Standard Map. It was found that a single spin excitation could be converted into a pair of non-dispersive, counter-propagating spin coherent states equivalent to the accelerator modes of the Standard Map. Here we consider how other types of quantum chaotic systems such as a double-kicked quantum rotor or a quantum rotor with a double-well potential might be realized with spin chains; we discuss the possibilities regarding manipulation of the one-magnon spin waves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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