arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0711.2268quant-phhep-phhep-th
收藏

粒子混合中的多体纠缠态

Multipartite entangled states in particle mixing

M. Blasone, F. Dell'Anno, S. De Siena, M. Di Mauro, F. Illuminati

摘要:

在香味混合物理学中,香味态是由质量本征态的叠加给出的。利用占据数定义多量子比特空间,味态可以解释为多体模纠缠态。通过利用一个合适的全球措施的纠缠,熵的基础上,所有可能的二分系统,我们分析了这种状态的相关性的情况下,三味和四味混合。根据混合参数,特别是对自由相,负责的CP-违反,纠缠集中在优选的bipartisits的值。我们详细量化的数量和纠缠的分布在夸克和中微子系统中的味道混合的物理相关的情况下。利用定域粒子的波包描述,采用适用于多体混合态的整体纠缠度量,分析了自由演化动力学对稳态中微子束量子关联的退相干.我们定义退相干长度为大质量中微子态之间相干干涉效应消失的距离。我们研究了CP破坏相在退相干过程中的作用。

英文摘要:

In the physics of flavor mixing, the flavor states are given by superpositions of mass eigenstates. By using the occupation number to define a multiqubit space, the flavor states can be interpreted as multipartite mode-entangled states. By exploiting a suitable global measure of entanglement, based on the entropies related to all possible bipartitions of the system, we analyze the correlation properties of such states in the instances of three- and four-flavor mixing. Depending on the mixing parameters, and, in particular, on the values taken by the free phases, responsible for the CP-violation, entanglement concentrates in preferred bipartitions. We quantify in detail the amount and the distribution of entanglement in the physically relevant cases of flavor mixing in quark and neutrino systems. By using the wave packet description for localized particles, we use the global measure of entanglement, suitably adapted for the instance of multipartite mixed states, to analyze the decoherence induced by the free evolution dynamics on the quantum correlations of stationary neutrino beams. We define a decoherence length as the distance associated with the vanishing of the coherent interference effects among massive neutrino states. We investigate the role of the CP-violating phase in the decoherence process.

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。

↑