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arXiv quant-ph/0404179quant-ph
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多体系统中的纠缠流

Entanglement flow in multipartite systems

T. S. Cubitt, F. Verstraete, J. I. Cirac

摘要:

我们研究了多体系统中的纠缠动力学,建立了纠缠流的定量概念:既通过单个粒子流动,又沿着相互作用粒子的一般网络流动。在前一种情况下,粒子传输纠缠的速率取决于该粒子与系统其余部分的纠缠。在后者中,我们推导出一组纠缠速率方程,将两个粒子子集之间的纠缠生成速率与网络中已经存在的纠缠联系起来。我们使用速率方程推导出量子比特链中纠缠产生的下限,并将其与现有的纠缠产生协议进行比较。

英文摘要:

We investigate entanglement dynamics in multipartite systems, establishing a quantitative concept of entanglement flow: both flow through individual particles, and flow along general networks of interacting particles. In the former case, the rate at which a particle can transmit entanglement is shown to depend on that particle's entanglement with the rest of the system. In the latter, we derive a set of entanglement rate equations, relating the rate of entanglement generation between two subsets of particles to the entanglement already present further back along the network. We use the rate equations to derive a lower bound on entanglement generation in qubit chains, and compare this to existing entanglement creation protocols.

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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