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Enforcing Thermal Entanglement of Three Coupled Qubits by Dissipation

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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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Acknowledgments

This research was supported by the National Natural Science Foundation of China under Grant No. 11075027, 1154162, 11605024 and the Research Foundation of Sichuan University of Science and Engineering Grant No. 2015RC40.

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Authors and Affiliations

  1. School of Physics and Electronic Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, China

    Jie Liu

  2. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, 116600, China

    An-Ge Wang, Wen-Shu Yang, Sheng-Fang Lv, Xiao-Fei Yue & Song-Lin Wu

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  1. An-Ge Wang
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  2. Wen-Shu Yang
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  3. Sheng-Fang Lv
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  4. Xiao-Fei Yue
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Correspondence to Jie Liu.

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Wang, AG., Yang, WS., Lv, SF. et al. Enforcing Thermal Entanglement of Three Coupled Qubits by Dissipation. Int J Theor Phys 56, 339–350 (2017). https://doi.org/10.1007/s10773-016-3173-x

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  • DOI: https://doi.org/10.1007/s10773-016-3173-x

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