Comparison of two unknown pure quantum states

被引：79
|
作者：
Barnett, SM
Chefles, A [1 ]
Jex, I
机构：
[1] Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England
[2] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G4 0NG, Lanark, Scotland
[3] Czech Tech Univ, FANS, Dept Phys, Prague 11519, Czech Republic
来源：
PHYSICS LETTERS A | 2003年 / 307卷 / 04期
关键词：
quantum mechanics; quantum information; quantum measurement;
D O I：
10.1016/S0375-9601(02)01602-X
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Can we establish whether or not two quantum systems have been prepared in the same state? We investigate the possibility of universal unambiguous state comparison. We show that it is impossible to conclusively identify two pure unknown states as being identical, and construct the optimal measurement for conclusively identifying them as being different. We then derive optimal strategies for state comparison when the state of each system is one of two known states. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：189 / 195
页数：7
相关论文
共 50 条
  • [31] An Efficient Multiparty Quantum Secret Sharing with Pure Entangled Two Photon States
    Shi, Run-hua
    Zhong, Hong
    ADVANCES IN COMPUTER SCIENCE, ENVIRONMENT, ECOINFORMATICS, AND EDUCATION, PT I, 2011, 214 : 489 - 495
  • [32] Joint Schmidt-type decomposition for two bipartite pure quantum states
    Eltschka, Christopher
    Siewert, Jens
    PHYSICAL REVIEW A, 2020, 101 (02)
  • [33] Multiparty quantum secret sharing with the pure entangled two-photon states
    Shi, Run-hua
    Zhong, Hong
    QUANTUM INFORMATION PROCESSING, 2012, 11 (01) : 161 - 169
  • [34] On the fidelity of two pure states
    Winter, A
    JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2001, 34 (35): : 7095 - 7101
  • [35] Quantifying the coherence of pure quantum states
    Chen, Jianxin
    Grogan, Shane
    Johnston, Nathaniel
    Li, Chi-Kwong
    Plosker, Sarah
    PHYSICAL REVIEW A, 2016, 94 (04)
  • [36] OBSERVABLE CHARACTERISTICS OF PURE QUANTUM STATES
    BOHN, J
    PHYSICAL REVIEW LETTERS, 1991, 66 (12) : 1547 - 1550
  • [37] Decomposition of pure states of quantum register
    I. Raptis
    P. Wallden
    R. R. Zapatrin
    The European Physical Journal D, 2007, 41 : 185 - 188
  • [38] Pure dephasing of magnonic quantum states
    Yuan, H. Y.
    Sterk, W. P.
    Kamra, Akashdeep
    Duine, Rembert A.
    PHYSICAL REVIEW B, 2022, 106 (10)
  • [39] Asymmetry properties of pure quantum states
    Marvian, Iman
    Spekkens, Robert W.
    PHYSICAL REVIEW A, 2014, 90 (01):
  • [40] Ptychographic reconstruction of pure quantum states
    Fernandes, M. F.
    Solis-Prosser, M. A.
    Neves, L.
    OPTICS LETTERS, 2020, 45 (21) : 6002 - 6005
12345