Quantum entanglement and entropy in particle creation

Shih Yuin Lin, Chung Hsien Chou, B. L. Hu

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

We investigate the basic theoretical issues in the quantum entanglement of particle pairs created from the vacuum in a time-dependent background field or spacetime. Similar to entropy generation from these processes which depends on the choice of physical variables and how certain information is coarse grained, entanglement dynamics hinges on the choice of measurable quantities and how the two parties are selected as well as the background dynamics of the field or spacetime. We discuss the conditions of separability of quantum states in particle creation processes and point out the differences in how the von Neumann entropy is used as a measure of entropy generation versus for entanglement dynamics. We show by an explicit construction that adoption of a different set of physical variables yields a different entanglement entropy. As an application of these theoretical considerations we show how the particle number and the quantum phase enter the entanglement dynamics in cosmological particle production.

原文English
文章編號084018
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
81
發行號8
DOIs
出版狀態Published - 2010 四月 12

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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