Resilience to decoherence of the macroscopic quantum superpositions generated by universally covariant optimal quantum cloning

被引：4
|
作者：
Spagnolo, Nicolo [1 ,2 ]
Sciarrino, Fabio [1 ,3 ]
De Martini, Francesco [1 ,4 ]
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] Consorzio Interuniv Sci Fis Materia, I-00185 Rome, Italy
[3] Ist Nazl Ottica, I-50125 Florence, Italy
[4] Accademia Nazl Lincei, I-00165 Rome, Italy
来源：
PHYSICAL REVIEW A | 2010年 / 82卷 / 03期
关键词：
STATE;
D O I：
10.1103/PhysRevA.82.032325
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We show that the quantum states generated by universal optimal quantum cloning of a single photon represent a universal set of quantum superpositions resilient to decoherence. We adopt the Bures distance as a tool to investigate the persistence of quantum coherence of these quantum states. According to this analysis, the process of universal cloning realizes a class of quantum superpositions that exhibits a covariance property in lossy configuration over the complete set of polarization states in the Bloch sphere.
引用
收藏
页数：7
相关论文
共 50 条
  • [41] OPTICAL IMPLEMENTATION OF THE OPTIMAL UNIVERSAL AND PHASE-COVARIANT QUANTUM CLONING MACHINES
    Ye, Liu
    Song, Xue-Ke
    Yang, Jie
    Yang, Qun
    Ma, Yang-Cheng
    MODERN PHYSICS LETTERS B, 2012, 26 (16):
  • [42] Optical realization of optimal symmetric universal and phase-covariant quantum cloning
    Song, Qing-Min
    Fang, Bao-Long
    Wu, Tao
    Ye, Liu
    JOURNAL OF MODERN OPTICS, 2011, 58 (02) : 160 - 164
  • [43] Optimal universal asymmetric covariant quantum cloning circuits for qubit entanglement manipulation
    Levente Szabo
    Matyas Koniorczyk
    Peter Adam
    Jozsef Janszky
    PHYSICAL REVIEW A, 2010, 81 (03):
  • [44] Solid-state optimal phase-covariant quantum cloning machine
    Pan, Xin-Yu
    Liu, Gang-Qin
    Yang, Li-Li
    Fan, Heng
    APPLIED PHYSICS LETTERS, 2011, 99 (05)
  • [45] Scheme for the implementation of optimal phase-covariant quantum cloning for equatorial qubits
    Song, W
    Yang, M
    Cao, ZL
    PHYSICS LETTERS A, 2004, 331 (1-2) : 34 - 38
  • [46] Uncertainty relations for the realization of macroscopic quantum superpositions and EPR paradoxes
    Cavalcanti, E. G.
    Reid, M. D.
    JOURNAL OF MODERN OPTICS, 2007, 54 (16-17) : 2373 - 2380
  • [47] Creating macroscopic quantum superpositions with Bose-Einstein condensates
    Gordon, D
    Savage, CM
    PHYSICAL REVIEW A, 1999, 59 (06): : 4623 - 4629
  • [48] MACROSCOPIC QUANTUM SUPERPOSITIONS BY MEANS OF SINGLE-ATOM DISPERSION
    SAVAGE, CM
    BRAUNSTEIN, SL
    WALLS, DF
    OPTICS LETTERS, 1990, 15 (11) : 628 - 630
  • [49] Measurement-based measure of the size of macroscopic quantum superpositions
    Korsbakken, Jan Ivar
    Whaley, K. Birgitta
    Dubois, Jonathan
    Cirac, J. Ignacio
    PHYSICAL REVIEW A, 2007, 75 (04):
  • [50] Optimal universal and phase-covariant quantum cloning machines with quantum-dot spins in cavity QED
    Zhu, Aidong
    Yeon, Kyu-Hwang
    Yu, Seong-Cho
    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2009, 42 (23)
12345