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arXiv 2103.07443quant-phcond-mat.stat-mech
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基于部分转置矩的对称分辨纠缠检测

Symmetry-resolved entanglement detection using partial transpose moments

Antoine Neven, Jose Carrasco, Vittorio Vitale, Christian Kokail, Andreas Elben, Marcello Dalmonte, Pasquale Calabrese, Peter Zoller, Benoît Vermersch, Richard Kueng, Barbara Kraus

摘要:

我们提出了一套有序的实验条件,用于检测混合态纠缠。第$k$个条件涉及到比较部分转置密度算子的矩直到$k$阶。值得注意的是,所有矩不等式的联合再现了用于检测纠缠的Peres-Horodecki准则。我们的经验研究强调,前四个条件已经在各种量子体系结构中可靠地检测到混合态纠缠。利用对称性可以帮助进一步提高它们的检测能力。我们还展示了如何估计矩不平等的基础上,本地随机测量的单状态副本(经典的阴影),并得出统计上健全的置信区间作为一个函数的数量进行测量。我们的分析包括漂移源的实验相关情况,即不相同,但独立的状态副本。

英文摘要:

We propose an ordered set of experimentally accessible conditions for detecting entanglement in mixed states. The $k$-th condition involves comparing moments of the partially transposed density operator up to order $k$. Remarkably, the union of all moment inequalities reproduces the Peres-Horodecki criterion for detecting entanglement. Our empirical studies highlight that the first four conditions already detect mixed state entanglement reliably in a variety of quantum architectures. Exploiting symmetries can help to further improve their detection capabilities. We also show how to estimate moment inequalities based on local random measurements of single state copies (classical shadows) and derive statistically sound confidence intervals as a function of the number of performed measurements. Our analysis includes the experimentally relevant situation of drifting sources, i.e. non-identical, but independent, state copies.

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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