Europhys. Lett.
Volume 69, Number 6, March 2005
Page(s) 868 - 873
Section General
Published online 23 February 2005
Europhys. Lett., 69 (6), pp. 868-873 (2005)
DOI: 10.1209/epl/i2004-10448-2

Decoherence from an antiferromagnetic environment

Xiao-Zhong Yuan and Ka-Di Zhu

Department of Physics, Shanghai Jiao Tong University Shanghai 200240, PRC

received 22 October 2004; accepted in final form 25 January 2005
published online 23 February 2005

The decoherence of a central spin in an antiferromagnetic environment is investigated theoretically in terms of the spin wave approximation. It is analytically shown that the decoherence factor which displays a Gaussian decay strongly depends on the quantum correlations and the structure of the environment. The relation between the decoherence factor and the environmental temperature is also given explicitly.

03.65.Yz - Decoherence; open systems; quantum statistical methods.
03.67.-a - Quantum information.
75.30.Ds - Spin waves.

© EDP Sciences 2005