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arXiv 1201.0243quant-ph
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量子相变中的Einstein-Podolsky-Rosen操纵

Einstein-Podolsky-Rosen Steering in Quantum Phase Transition

Chunfeng Wu, Jing-Ling Chen, Dong-Ling Deng, Hong-Yi Su, X. X. Yi, C. H. Oh

摘要:

本文研究了量子相变中的Einstein-Podolsky-Rosen(EPR)操纵及其临界性。结果表明,XY自旋链基态EPR可操纵性函数在量子相变附近具有非解析性质,其对各向异性参数的导数在临界点处发散.然后,我们验证了EPR可操纵性函数的临界现象在系统中的普遍性。我们还利用两量子比特EPR操纵不等式讨论了EPR操纵与量子相变之间的关系。

英文摘要:

We investigate the Einstein-Podolsky-Rosen (EPR) steering and its criticality in quantum phase transition. It is found that the EPR steerability function of the ground state of XY spin chain exhibits nonanalytic feature in the vicinity of a quantum phase transition by showing that its derivative with respect to anisotropy parameter diverges at the critical point. We then verify the universality of the critical phenomena of the EPR steerability function in the system. We also use two-qubit EPR-steering inequality to explore the relation between EPR steering and quantum phase transition.

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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