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Research PapersNo Access

GEOMETRIC PHASE OF SPIN CHAIN SYSTEM IN THE NONEQUILIBRIUM THERMAL ENVIRONMENTS

Department of Physics, Weinan Normal University, Weinan 714000, China

Corresponding author.

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Faculty of Science, Xi'an University of Architecture and Technology, Xi'an 710055, China

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Department of Physics, Weinan Normal University, Weinan 714000, China

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Department of Physics, Weinan Normal University, Weinan 714000, China

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https://doi.org/10.1142/S0217984913500784Cited by:4 (Source: Crossref)

Abstract

In this paper, we investigate the nonequilibrium geometric phase (GP) of a spin chain system whose two end spins are respectively coupled to thermal reservoirs at different temperatures. In the spin chain, there exists the XX-type spin interaction and an external field is applied to each spin. An analytical expression for the GP is found in the weak coupling limit. The influences of various parameters on the deviation of GP from the unitary one are investigated. It is found that the GP is more stable against the decoherence when the external field is homogenously applied. In addition, the present result may provide a useful approach to the maintenance of GP in the nonequilibrium system.

Keywords:

PACS: 03.65.Vf, 03.65.Yz, 42.50.Dv

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Journal cover image

Vol. 27, No. 11

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History

Received 23 November 2012

Revised 4 February 2013

Accepted 26 February 2013

Published: 11 April 2013

Keywords