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arXiv 1610.04735quant-ph
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多体纠缠最优产生中的临界行为

Critical behaviour in the optimal generation of multipartite entanglement

M. G. M. Moreno, Fernando Parisio

摘要:

两个系统的相关性不能用经典的方法来解释,这是量子纠缠最简单的例子。虽然这种两方的关联在量子力学的基础和应用上引发了一场革命,但几方之间真正的纠缠揭示了一种全新的现象和应用。在这项工作中,我们提出了一种方法来制备迪克态从一个可调的源的二体纠缠调查的基础问题。该方案具有以下特点:(i)依赖于受控的信息丢失和{ \it unentangled}测量;(ii)不管源纠缠如何,只要产生Dicke态,它就是理想的;(iii)依赖于Dicke态的参数,二分源的最佳纠缠经历了类二阶跃迁.这些性质导致任何属于Dicke态的量子比特和其余量子比特之间的纠缠的渐近结果。

英文摘要:

Two systems whose correlations cannot be classically accounted for display the simplest instance of quantum entanglement. Although this two-party association has caused a revolution in the foundations and uses of quantum mechanics, genuine entanglement among several parties unveils a whole new class of phenomena and applications. In this work we suggest a way to prepare Dicke states from a tunable source of bipartite entanglement to investigate foundational issues. The scheme has the following distinctive features: (i) it relies on controlled information loss and {\it unentangled} measurements; (ii) irrespective of the source entanglement, whenever a Dicke state is produced, it is ideal; (iii) the optimal entanglement of the bipartite source undergoes a second-order-like transition depending on the parameters of the Dicke state to be produced. These properties lead to asymptotic results on the entanglement between any qubit belonging to a Dicke state and the remaining qubits.

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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