Thermal Entanglement in Spin-Dimer V4+ with a Strong Magnetic Field
ZHANG Guo-Feng1,2, LIANG Jiu-Qing1, YAN Qi-Wei2
1Institute of Theoretical Physics, Shanxi University, Taiyuan 030006
2Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
Thermal Entanglement in Spin-Dimer V4+ with a Strong Magnetic Field
ZHANG Guo-Feng1,2;LIANG Jiu-Qing1;YAN Qi-Wei2
1Institute of Theoretical Physics, Shanxi University, Taiyuan 030006
2Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： We study the entanglement in Heisenberg dimer single molecular magnets V4+ with a strong magnetic field by means of the measure of entanglement called “concurrence”and find that thermal entanglement exists for both the ferromagnetic (FM) and antiferromagnetic (AFM) cases. In the FM case, entanglement vanishes for anisotropic parameter λ = 0 while in the AFM case, entanglement exits in the whole region of anisotropic parameter 0 ≤ λ ≤ 1. Entanglement variations with anisotropic parameter λ, magnetic field B and temperature T are evaluated. We find a critical magnetic field at which the concurrence changes sharply from zero to maximum entanglement.
(Quantum computation architectures and implementations)
引用本文:
ZHANG Guo-Feng;LIANG Jiu-Qing;YAN Qi-Wei. Thermal Entanglement in Spin-Dimer V4+ with a Strong Magnetic Field[J]. 中国物理快报, 2003, 20(4): 452-455.
ZHANG Guo-Feng, LIANG Jiu-Qing, YAN Qi-Wei. Thermal Entanglement in Spin-Dimer V4+ with a Strong Magnetic Field. Chin. Phys. Lett., 2003, 20(4): 452-455.
2003, Vol. 20 
