Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning

被引：17
作者：
De Martini, Francesco [1 ,2 ,3 ]
Sciarrino, Fabio [1 ,2 ]
Spagnolo, Nicolo [1 ,2 ]
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Consorzio Nazl Interuniv Sci Fis Mat, I-00185 Rome, Italy
[3] Acad Nazl Lincei, I-00165 Rome, Italy
来源：
PHYSICAL REVIEW A | 2009年 / 79卷 / 05期
关键词：
quantum optics; quantum theory; CURRENT SITUATION; COMPUTATION; PHOTONS;
D O I：
10.1103/PhysRevA.79.052305
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The high resilience to decoherence shown by a recently discovered macroscopic quantum superposition (MQS) generated by a quantum-injected optical parametric amplifier and involving a number of photons in excess of 5x10(4) motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on parallel to alpha > and N-photon maximally entangled states (NOON), in the perspective of the comprehensive theory of the subject by Zurek. In that perspective the concepts of "pointer state" and "environment-induced superselection" are applied to the new scheme.
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页数：9
相关论文
共 42 条
[1]  
[Anonymous], 1966, GEN HYPERGEOMETRIC F
[2]  
BJORK G, COMMUNICATION
[3]   MANIPULATION OF PHOTONS IN A CAVITY BY DISPERSIVE ATOM-FIELD COUPLING - QUANTUM-NONDEMOLITION MEASUREMENTS AND GENERATION OF SCHRODINGER CAT STATES [J].
BRUNE, M ;
HAROCHE, S ;
RAIMOND, JM ;
DAVIDOVICH, L ;
ZAGURY, N .
PHYSICAL REVIEW A, 1992, 45 (07) :5193-5214
[4]   AN EXTENSION OF KAKUTANIS THEOREM ON INFINITE PRODUCT MEASURES TO TENSOR PRODUCT OF SEMIFINITE W]-ALGEBRAS [J].
BURES, D .
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1969, 135 (JAN) :199-&
[5]   Realization of an optimally distinguishable multiphoton quantum superposition [J].
De Martini, F ;
Sciarrino, F ;
Secondi, V .
PHYSICAL REVIEW LETTERS, 2005, 95 (24)
[6]   Non-linear parametric processes in quantum information [J].
De Martini, F ;
Sciarrino, F .
PROGRESS IN QUANTUM ELECTRONICS, 2005, 29 (3-5) :165-256
[7]   Amplification of quantum entanglement [J].
De Martini, F .
PHYSICAL REVIEW LETTERS, 1998, 81 (14) :2842-2845
[8]   Quantum superposition of parametrically amplified multiphoton pure states [J].
De Martini, F .
PHYSICS LETTERS A, 1998, 250 (1-3) :15-19
[9]   Entanglement test on a microscopic-macroscopic system [J].
De Martini, Francesco ;
Sciarrino, Fabio ;
Vitelli, Chiara .
PHYSICAL REVIEW LETTERS, 2008, 100 (25)
[10]  
DEMARTINI F, ARXIV08040341
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