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arXiv 0810.2936quant-ph
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热库中两量子比特X-态纠缠的操纵性突然死亡

Manipulating sudden death of entanglement of two-qubit X-states in thermal reservoirs

Mazhar Ali, G. Alber, A. R. P. Rau

摘要:

研究了两个量子比特与统计不相关热库相互作用系统中纠缠突然死亡(ESD)的操纵。研究表明,对于最初准备的两个量子位的X态,可以借助Peres-Horodecki准则推导出一个简单的(必要且充分的)ESD准则。这个标准意味着,与零温度的情况相反,在至少一个库的有限温度下,所有最初制备的两个量子位X态都表现出ESD。一般条件下,得出ESD可以加速,延迟,或避免。

英文摘要:

Manipulation of sudden death of entanglement (ESD) of two qubits interacting with statistically uncorrelated thermal reservoirs is investigated. It is shown that for initially prepared X-states of the two qubits a simple (necessary and sufficient) criterion for ESD can be derived with the help of the Peres-Horodecki criterion. This criterion implies that, in contrast to the zero-temperature case, at finite temperature of at least one of the reservoirs all initially prepared two-qubit X-states exhibit ESD. General conditions are derived under which ESD can be hastened, delayed, or averted.

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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