大学物理 ›› 2016, Vol. 35 ›› Issue (11): 20-23.doi: 10.16854/j.cnki.1000-0712.2016.0160

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一类近似等式与单个粒子相干叠加态的概念性讨论

曾天海   

  1. 北京理工大学物理学院,北京 100081
  • 收稿日期:2016-02-23 修回日期:2016-04-11 出版日期:2016-11-20 发布日期:2016-11-20
  • 作者简介:曾天海(1963—),男,江西宁都人,北京理工大学物理学院副教授,博士,硕士生导师,主要从事物理学的
  • 基金资助:
    国家自然科学基金(11075013,11375025)资助

Conceptual discussion for approximate equations of a type and coherent superposition of states of single particle

ZENG Tian hai   

  1. School of Physics,Beijing Institute of Technology,Beijing 100081,China
  • Received:2016-02-23 Revised:2016-04-11 Online:2016-11-20 Published:2016-11-20

摘要: 纠缠态的定义是不能表示成直积的状态. 而一些量子系统中,描述系统的纠缠态可近似等于直积态. 本文对这一类近似等式做概念性讨论,说明这是单个粒子相干叠加态的一种来源,很可能是唯一来源.

关键词: 纠缠态, 直积态, 单个粒子相干叠加态

Abstract: The definition of entangled state is that it cannot be expressed in a product state,however,in some quantum systems,the entangled states which are used to describe them could be approximately equal to the product states. Conceptual discussion for the approximate equations of such type can be used to explain that this is a source of producing coherent superposition of states of single particle,and it is very possibly the only source.

Key words: entangled state, product state, coherent superposition of states of single particle