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arXiv quant-ph/0202044quant-ph
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净化的纠缠

The entanglement of purification

Barbara M. Terhal, Michal Horodecki, Debbie W. Leung, David P. DiVincenzo

摘要:

我们引入了一种既能度量量子关联又能度量量子态中经典关联的方法--纠缠纯化。我们表明,(正则化)纠缠的纯化是等于创建一个状态$ρ$渐近从最大纠缠态的纠缠成本,可忽略不计的通信。我们证明了经典互信息和量子互信息除以2是正则化纠缠纯化的下界。我们给出了${\cal H}_2 \otimes {\cal H}_2$中Werner态的纠缠纯化的数值结果。

英文摘要:

We introduce a measure of both quantum as well as classical correlations in a quantum state, the entanglement of purification. We show that the (regularized) entanglement of purification is equal to the entanglement cost of creating a state $ρ$ asymptotically from maximally entangled states, with negligible communication. We prove that the classical mutual information and the quantum mutual information divided by two are lower bounds for the regularized entanglement of purification. We present numerical results of the entanglement of purification for Werner states in ${\cal H}_2 \otimes {\cal H}_2$.

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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