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
  • [31] Scaling of macroscopic superpositions close to a quantum phase transition
    Abad, Tahereh
    Karimipour, Vahid
    PHYSICAL REVIEW B, 2016, 93 (19)
  • [32] Phase-covariant quantum cloning
    Bruss, D
    Cinchetti, M
    D'Ariano, GM
    Macchiavello, C
    PHYSICAL REVIEW A, 2000, 62 (01): : 7
  • [33] Experiments testing macroscopic quantum superpositions must be slow
    Andrea Mari
    Giacomo De Palma
    Vittorio Giovannetti
    Scientific Reports, 6
  • [34] Experiments testing macroscopic quantum superpositions must be slow
    Mari, Andrea
    De Palma, Giacomo
    Giovannetti, Vittorio
    SCIENTIFIC REPORTS, 2016, 6
  • [35] Generation of macroscopic quantum superpositions of optomechanical oscillators by dissipation
    Tan, Huatang
    Bariani, F.
    Li, Gaoxiang
    Meystre, P.
    PHYSICAL REVIEW A, 2013, 88 (02):
  • [36] Phase-covariant quantum cloning
    Fan, H
    Matsumoto, K
    Wang, XB
    Imai, H
    JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2002, 35 (34): : 7415 - 7423
  • [37] Optimal covariant quantum networks
    Chiribella, Giulio
    D'Ariano, Giacomo Mauro
    Perinotti, Paolo
    QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC), 2009, 1110 : 47 - 56
  • [38] Optimal covariant quantum measurements
    Haapasalo, Erkka
    Pellonpaa, Juha-Pekka
    JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, 2021, 54 (15)
  • [39] Decoherence in macroscopic quantum phenomena in magnetic particles
    Garg, A
    QUANTUM COHERENCE AND DECOHERENCE: FOUNDATIONS OF QUANTUM MECHANICS IN THE LIGHT OF NEW TECHNOLOGY, 1996, : 229 - 234
  • [40] Experimental realization of the optimal universal and phase-covariant quantum cloning machines
    Xu, Jin-Shi
    Li, Chuan-Feng
    Chen, Lei
    Zou, Xu-Bo
    Guo, Guang-Can
    PHYSICAL REVIEW A, 2008, 78 (03):
12345