2006/03/31 by R. M. Angelo, E. S. Cardoso, K. Furuya
Computer Science · Mathematics · Physics and Astronomy · #Boson #Gaussian #Limit (mathematics) #Master equation #Mathematics #Phase (matter) #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum dissipation #Quantum mechanics #Spectroscopy and Quantum Chemical Studies #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physreva.73.062107
published as Physical Review A 73, 062107 (2006) · 8 pages, 3 figures
openalex publication_date 2006/06/09 · arxiv created 2006/06/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A phase damping reservoir composed by N-bosons coupled to a system of interest through a cross-Kerr interaction is proposed and its effects on quantum superpositions are investigated. By means of analytical calculations we show that: (i) the reservoir induces a Gaussian decay of quantum coherences, and (ii) the inherent incommensurate character of the spectral distribution yields irreversibility. A state-independent decoherence time and a master equation are both derived analytically. These results, which have been extended for the thermodynamic limit, show that nondissipative decoherence can be suitably contemplated within the environment-induced decoherence (EID) approach. Finally, it is shown that the same mechanism yielding decoherence are also responsible for inducing dynamical disentanglement.