热态中纠缠的存续
量子物理
2008-02-13 v2
摘要
我们给出了由基态纠缠产生的热态中存在多体纠缠的一般充分性条件。该条件以基态纠缠和配分函数表示，并给出了保证纠缠存续的临界温度。它灵活且可轻易调整以考虑不同分割下的纠缠，也可被弱化以通过近似允许更简便的计算。文中给出了计算该条件的示例。这些示例使我们能够刻画热力学极限中纠缠存续的最小能隙行为。此外，同样的技术可用于发现单向量子计算中制备有用资源态的噪声阈值。
引用
@article{arxiv.quant-ph/0606103,
title = {Survival of entanglement in thermal states},
author = {Damian Markham and Janet Anders and Vlatko Vedral and Mio Murao and Akimasa Miyake},
journal= {arXiv preprint arXiv:quant-ph/0606103},
year = {2008}
}
备注
6 pages, 2 figures. Changes made in line with publication recommendations. Motivation and concequences of result clarified, with the addition of one more example, which applies the result to give noise thresholds for measurement based quantum computing. New author added with new results