Quantum copying: A network

被引：170
作者：
Buzek, V
Braunstein, SL
Hillery, M
Bruss, D
机构：
[1] SLOVAK ACAD SCI, INST PHYS, BRATISLAVA 84228, SLOVAKIA
[2] UNIV WALES, BANGOR LL57 1UT, GWYNEDD, WALES
[3] CUNY HUNTER COLL, DEPT PHYS & ASTRON, NEW YORK, NY 10021 USA
[4] UNIV OXFORD, DEPT PHYS, CLARENDON LAB, OXFORD OX1 3PU, ENGLAND
来源：
PHYSICAL REVIEW A | 1997年 / 56卷 / 05期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevA.56.3446
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a network consisting of quantum gates that produces two imperfect copies of an arbitrary qubit. The quality of the copies does not depend on the input qubit. We also show that for a restricted class of inputs it is possible to use a very similar network to produce three copies instead of two. For qubits in this class, the copy quality is again independent of the input and is the-same as the quality of the copies produced by the two-copy network. [S1050-2947(97)09510-3].
引用
收藏
页码：3446 / 3452
页数：7
相关论文
共 11 条
  • [1] ELEMENTARY GATES FOR QUANTUM COMPUTATION
    BARENCO, A
    BENNETT, CH
    CLEVE, R
    DIVINCENZO, DP
    MARGOLUS, N
    SHOR, P
    SLEATOR, T
    SMOLIN, JA
    WEINFURTER, H
    [J]. PHYSICAL REVIEW A, 1995, 52 (05): : 3457 - 3467
  • [2] Noncommuting mixed states cannot be broadcast
    Barnum, H
    Caves, CM
    Fuchs, CA
    Jozsa, R
    Schumacher, B
    [J]. PHYSICAL REVIEW LETTERS, 1996, 76 (15) : 2818 - 2821
  • [3] BRUSS D, UNPUB
  • [4] Broadcasting of entanglement via local copying
    Buzek, V
    Vedral, V
    Plenio, MB
    Knight, PL
    Hillery, M
    [J]. PHYSICAL REVIEW A, 1997, 55 (05) : 3327 - 3332
  • [5] Quantum copying: Beyond the no-cloning theorem
    Buzek, V
    Hillery, M
    [J]. PHYSICAL REVIEW A, 1996, 54 (03): : 1844 - 1852
  • [6] Buzek V., 1997, Acta Physica Slovaca, V47, P193
  • [7] Optimal quantum cloning machines
    Gisin, N
    Massar, S
    [J]. PHYSICAL REVIEW LETTERS, 1997, 79 (11) : 2153 - 2156
  • [8] Quantum copying: Fundamental inequalities
    Hillery, M
    Buzek, V
    [J]. PHYSICAL REVIEW A, 1997, 56 (02): : 1212 - 1216
  • [9] Separability of mixed states: Necessary and sufficient conditions
    Horodecki, M
    Horodecki, P
    Horodecki, R
    [J]. PHYSICS LETTERS A, 1996, 223 (1-2) : 1 - 8
  • [10] Separability criterion for density matrices
    Peres, A
    [J]. PHYSICAL REVIEW LETTERS, 1996, 77 (08) : 1413 - 1415
12