arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0606103quant-ph
收藏

纠缠在热态中的生存

Survival of entanglement in thermal states

Damian Markham, Janet Anders, Vlatko Vedral, Mio Murao, Akimasa Miyake

摘要:

我们给出了一个一般的充分条件,证明了热态中存在多体纠缠,而这种纠缠是由基态纠缠引起的。该条件是书面的基态纠缠和配分函数,它给出了过渡温度下,纠缠是保证生存。它是灵活的,可以很容易地适应于考虑不同分裂的纠缠,以及被削弱,以允许更容易的近似计算。给出了计算条件的实例。这些例子使我们能够描述在热力学极限下纠缠生存的最小间隙行为。此外,相同的技术可以用于在单向量子计算的有用资源状态的生成中找到噪声阈值。

英文摘要:

We present a general sufficiency condition for the presence of multipartite entanglement in thermal states stemming from the ground state entanglement. The condition is written in terms of the ground state entanglement and the partition function and it gives transition temperatures below which entanglement is guaranteed to survive. It is flexible and can be easily adapted to consider entanglement for different splittings, as well as be weakened to allow easier calculations by approximations. Examples where the condition is calculated are given. These examples allow us to characterize a minimum gapping behavior for the survival of entanglement in the thermodynamic limit. Further, the same technique can be used to find noise thresholds in the generation of useful resource states for one-way quantum computing.

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。

↑