Please use this identifier to cite or link to this item:
Title: Entanglement of a 2-qubit system coupled to a bath of quantum spin glass
Authors: Koh, C.Y.
Kwek, L.C. 
Keywords: Entanglement
Spin chain
Spin glass
Issue Date: 1-Jun-2014
Citation: Koh, C.Y., Kwek, L.C. (2014-06-01). Entanglement of a 2-qubit system coupled to a bath of quantum spin glass. Physica A: Statistical Mechanics and its Applications 403 : 54-64. ScholarBank@NUS Repository.
Abstract: We study the quantum entanglement (concurrence) of a 2-qubit system coupled to a small spin glass bath of 2 to n≥ 4 qubits. The bath is described by the quantum XX Heisenberg model with random J coupling and varying magnetic field h. We look at the dynamics of the steady state average concurrence for the system and obtain a general formula to describe the concurrence with J=0 and h=0 for n bath sites. The physics of 2-qubit system coupled with n bath sites for J=0 is analytically described for small n. The result for large n was numerically found to be qualitatively similar. For small fluctuation in J, a mean steady state average concurrence of about 0.5 is obtained. © 2014 Elsevier B.V. All rights reserved.
Source Title: Physica A: Statistical Mechanics and its Applications
ISSN: 03784371
DOI: 10.1016/j.physa.2014.02.017
Appears in Collections:Staff Publications

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


checked on Aug 18, 2018


checked on Jul 16, 2018

Page view(s)

checked on Aug 3, 2018

Google ScholarTM



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