Phase-covariant quantum cloning of qudits

被引：105

作者：

Fan, H ^{[1
]}

Imai, H ^{[1
]}

Matsumoto, K ^{[1
]}

Wang, XB ^{[1
]}

机构：

[1] Japan Sci & Technol Corp, ERATO, Quantum Computat & Quantum Informat Project, Bunkyo Ku, Tokyo 1330033, Japan

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.67.022317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the phase-covariant quantum cloning machine for qudits, i.e., the input states in a d-level quantum system have complex coefficients with arbitrary phase but constant module. A cloning unitary transformation is proposed. After optimizing the fidelity between input state and single qudit reduced density operator of output state, we obtain the optimal fidelity for 1 to 2 phase-covariant quantum cloning of qudits and the corresponding cloning transformation.

引用

页数：5

共 29 条

[1] BANDYOPADHYAY S, QUANTPH0103162
[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] Bennett C. H., 1984, PROC IEEE INT C COMP, P175, DOI [DOI 10.1016/J.TCS.2014.05.025, 10.1016/j.tcs.2014.05.025]
[4] Optimal eavesdropping in quantum cryptography with six states
Bruss, D
[J]. PHYSICAL REVIEW LETTERS, 1998, 81 (14) : 3018 - 3021
[5] Optimal universal and state-dependent quantum cloning
Bruss, D
DiVincenzo, DP
Ekert, A
Fuchs, CA
Macchiavello, C
Smolin, JA
[J]. PHYSICAL REVIEW A, 1998, 57 (04): : 2368 - 2378
[6] Optimal state estimation for d-dimensional quantum systems
Bruss, D
Macchiavello, C
[J]. PHYSICS LETTERS A, 1999, 253 (5-6) : 249 - 251
[7] Optimal universal quantum cloning and state estimation
Bruss, D
Ekert, A
Macchiavello, C
[J]. PHYSICAL REVIEW LETTERS, 1998, 81 (12) : 2598 - 2601
[8] Bruss D, 2000, PHYS REV A, V62, DOI [10.1103/PhysRevA.62.012302, 10.1103/PhysRevA.62.062302]
[9] Quantum copying: A network
Buzek, V
Braunstein, SL
Hillery, M
Bruss, D
[J]. PHYSICAL REVIEW A, 1997, 56 (05): : 3446 - 3452
[10] Universal optimal cloning of arbitrary quantum states: From qubits to quantum registers
Buzek, V
Hillery, M
[J]. PHYSICAL REVIEW LETTERS, 1998, 81 (22) : 5003 - 5006

← 1 2 3 →