Enforcing Thermal Entanglement of Three Coupled Qubits by Dissipation |
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| Authors: | An-Ge Wang Wen-Shu Yang Sheng-Fang Lv Xiao-Fei Yue Song-Lin Wu Jie Liu |
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| Institution: | 1.School of Physics and Electronic Engineering,Sichuan University of Science and Engineering,Zigong,China;2.School of Physics and Materials Engineering,Dalian Nationalities University,Dalian,China |
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| Abstract: | The stationary state entanglement in a chain with three spins is reported. Each of spins couples to its own separate bosonic reservoir. The master equation for such spins’ system is derived under the Born-Markovian approximation. The result presents that the coupling between the middle spin and its bosonic bath in some special temperature region reinforce the entanglement between the spins. By analyzing the heat current between the middle spin and its bosonic bath, we find a tight relationship between the direction of heat current from the middle spin to its bosonic bath and the reinforcement of the entanglement. The entanglement increases with the heat current between the middle spin and its bosonic bath almost linearly. |
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