Simulating dnamical Casimir effect at finite temperature with magnons in spin chain within an optical lattice
Zhao Xu1 , Zhao Xing-Dong1 2 , Jing Hui2
1. State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China;
Abstract In this paper, we study the dynamical characteristics of magnons generated by the static magnetic dipole-dipole interaction and the external-laser induced dipole-dipole interaction in spin chain within an optical lattice. Specially, we choose a blue-detuned optical lattice and define an effective temperature for the system. We make a comparison between the generation process of magnons and that of photons in an optical vibration cavity. The results show that by suitably choosing the system parameters, the dynamical Casimir effect at finite temperature in the magnon system can be reproduced.
Key words ：
optical lattice
dipole-dipole interaction
magnon
Casimir effect
Received: 2012-10-25
PACS:
03.75.Kk
(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
03.75.Mn
(Multicomponent condensates; spinor condensates)
11.10.Wx
(Finite-temperature field theory)
32.80.Qk
(Coherent control of atomic interactions with photons)
Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB921604), the National Natural Science Foundation of China (Grant Nos. 11004057, 10828408), and the Program of Shanghai Subject Chief Scientist, China (Grant No. B480).
Corresponding Authors:
赵旭
E-mail: phyzxu@gmail.com
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