中国物理B ›› 2014, Vol. 23 ›› Issue (3): 30307-030307.doi: 10.1088/1674-1056/23/3/030307

• GENERAL • 上一篇    下一篇

The duality of a single particle with an n-dimensional internal degree of freedom

贾爱爱a b, 黄接辉c, 冯伟b, 张天才a, 朱诗尧a b   

  1. a The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
    b Beijing Computational Science Research Center, Beijing 100084, China;
    c College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
  • 收稿日期:2013-07-29 修回日期:2013-09-22 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921603) and the National Natural Science Foundation of China (Grant Nos. 11125418 and 11364022).

The duality of a single particle with an n-dimensional internal degree of freedom

Jia Ai-Ai (贾爱爱)a b, Huang Jie-Hui (黄接辉)c, Feng Wei (冯伟)b, Zhang Tian-Cai (张天才)a, Zhu Shi-Yao (朱诗尧)a b   

  1. a The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
    b Beijing Computational Science Research Center, Beijing 100084, China;
    c College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
  • Received:2013-07-29 Revised:2013-09-22 Online:2014-03-15 Published:2014-03-15
  • Contact: Jia Ai-Ai E-mail:jiaaiai1988@163.com
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921603) and the National Natural Science Foundation of China (Grant Nos. 11125418 and 11364022).

摘要: The wave–particle duality of a single particle with an n-dimensional internal degree of freedom is re-examined theoretically in a Mach–Zehnder interferometer. The famous duality relation D2+V2 ≤ 1 is always valid in this situation, where D is the distinguishability and V is the visibility. However, the sum of the particle information and the wave information, D2+V2, can be smaller than one for the input of a pure state if this initial pure state includes the internal degree of freedom of the particle, while the quantity D2+V2 is always equal to one when the internal degree of freedom of the particle is excluded.

关键词: wave–, particle duality, internal degree of freedom, single particle

Abstract: The wave–particle duality of a single particle with an n-dimensional internal degree of freedom is re-examined theoretically in a Mach–Zehnder interferometer. The famous duality relation D2+V2 ≤ 1 is always valid in this situation, where D is the distinguishability and V is the visibility. However, the sum of the particle information and the wave information, D2+V2, can be smaller than one for the input of a pure state if this initial pure state includes the internal degree of freedom of the particle, while the quantity D2+V2 is always equal to one when the internal degree of freedom of the particle is excluded.

Key words: wave–, particle duality, internal degree of freedom, single particle

中图分类号:  (Foundations of quantum mechanics; measurement theory)

  • 03.65.Ta
42.50.Xa (Optical tests of quantum theory) 07.60.Ly (Interferometers)