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arXiv 2103.01130quant-ph
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具有Dzyaloshinsky-Moriya相互作用的海森堡模型在非均匀外场中的热相干性

Thermal coherence of the Heisenberg model with Dzyaloshinsky-Moriya interactions in an inhomogenous external field

Manikandan Parthasarathy, Segar Jambulingam, Tim Byrnes, Chandrashekar Radhakrishnan

摘要:

研究了具有Dzyaloshinsky-Moriya(DM)相互作用的两格点XYZ模型在非均匀磁场中的量子相干性. DM相互作用、磁场和测量基可以沿不同的方向,我们研究了有限温度下的量子相干性。对于自旋-自旋相互作用参数,我们发现当测量基的方向与自旋-自旋相互作用的方向相同时,量子相干性降低。当自旋-晶格相互作用发生变化时,相干性总是增加,而与其方向和测量基之间的关系无关。对基于外部非均匀磁场变化的量子相干性也进行了类似的分析,发现当测量基方向与外场方向相同时,相干性降低。

英文摘要:

The quantum coherence of the two-site XYZ model with Dzyaloshinsky-Moriya (DM) interactions in an external inhomogenous magnetic field is studied. The DM interaction, the magnetic field and the measurement basis can be along different directions, and we examine the quantum coherence at finite temperature. With respect to the spin-spin interaction parameter, we find that the quantum coherence decreases when the direction of measurement basis is the same as that of the spin-spin interaction. When the spin-lattice interaction is varied, the coherence always increases irrespective of the relation between its direction and the measurement basis. Similar analysis of quantum coherence based on the variation of the external inhomogenous magnetic field is also carried out, where we find that the coherence decreases when the direction of the measurement basis is the same as that of the external field.

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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