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Chin. Phys. B, 2013, Vol. 22(2): 020302    DOI: 10.1088/1674-1056/22/2/020302
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Asymptotic dynamics of the alternate degrees of freedom for atwo-mode system: An analytically solvable model

M. Arsenijevića, J. Jeknić-Dugićb, M. Dugića
a Department of Physics, Faculty of Science, Kragujevac, Serbia;
b Department of Physics, Faculty of Science and Mathematics, Niš, Serbia
Abstract  The composite systems can be non-uniquely decomposed into parts (subsystems). Not all decompositions (structures) of a composite system are equally physically relevant. In this paper we answer on theoretical ground why it may be so. We consider a pair of mutually un-coupled modes in the phase space representation that are subjected to the independent quantum amplitude damping channels. By investigating asymptotic dynamics of the degrees of freedom, we find that the environment is responsible for the structures non-equivalence. Only one structure is distinguished by both locality of the environmental influence on its subsystems and a classical-like description.
Keywords:  amplitude dissipative channel      two-mode state      Kraus representation      alternate degrees of freedom  
Received:  24 July 2012      Revised:  30 August 2012      Accepted manuscript online: 
PACS:  03.65.-w (Quantum mechanics)  
  03.65.Yz (Decoherence; open systems; quantum statistical methods)  
  42.25.-p (Wave optics)  
Fund: Project financially supported by the Ministry of Science Serbia (Grant No. 171028).
Corresponding Authors:  M. Arsenijević     E-mail:  momirarsenijevic@gmail.com

Cite this article: 

M. Arsenijević, J. Jeknić-Dugić, M. Dugić Asymptotic dynamics of the alternate degrees of freedom for atwo-mode system: An analytically solvable model 2013 Chin. Phys. B 22 020302

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