Please use this identifier to cite or link to this item:
Title: Decoherence induced by a composite environment
Authors: Chaudhry, A.Z.
Gong, J. 
Issue Date: 31-Jan-2014
Citation: Chaudhry, A.Z., Gong, J. (2014-01-31). Decoherence induced by a composite environment. Physical Review A - Atomic, Molecular, and Optical Physics 89 (1) : -. ScholarBank@NUS Repository.
Abstract: It is not always justified to model the environment of a realistic quantum system as a collection of harmonic oscillators or two-level systems. To explore interesting physics associated with a composite environment, here we study the dynamics of a qubit coupled to a second two-level system, which is in turn coupled to a harmonic-oscillator bath. That is, the qubit of interest is in the presence of a composite environment consisting of the second two-level system and a conventional harmonic-oscillator bath. We investigate the issue of pointer states of decoherence for the qubit for different coupling strengths between the qubit and such a composite environment. It is shown that for weak-, intermediate-, or strong-coupling strengths, the qubit's reduced density matrix has a coupling-strength-dependent diagonal representation, thus yielding coupling-strength-dependent computational pointer states. Interestingly, the associated decoherence rate can decrease as the coupling strength increases. © 2014 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.89.014104
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 7, 2019


checked on Nov 29, 2019

Page view(s)

checked on Nov 30, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.