Chin. Phys. Lett.  2018, Vol. 35 Issue (11): 110302    DOI: 10.1088/0256-307X/35/11/110302
GENERAL |
Exact Entanglement Dynamics in Three Interacting Qubits
Wen-Bin He1,2, Xi-Wen Guan1,3,4**
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
2University of Chinese Academy of Sciences, Beijing 100049
3Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071
4Department of Theoretical Physics, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia
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Wen-Bin He, Xi-Wen Guan 2018 Chin. Phys. Lett. 35 110302
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Abstract Motivated by recent experimental studies on coherent dynamics transfer in three interacting atoms or electron spins [Phys. Rev. Lett 114 (2015) 113002, Phys. Rev. Lett 120 (2018) 243604], here we study entanglement entropy transfer in three interacting qubits. We analytically calculate time evolutions of wave function, density matrix and entanglement of the system. We find that initially entangled two qubits may alternatively transfer their entanglement entropy to other two qubit pairs. Thus dynamical evolution of three interacting qubits may produce a genuine three-partite entangled state through entanglement entropy transfers. In particular, different pairwise interactions of the three qubits endow symmetric and asymmetric evolutions of the entanglement transfer, characterized by the quantum mutual information and concurrence. Finally, we discuss an experimental proposal of three Rydberg atoms for testing the entanglement dynamics transfer of this kind.
Received: 16 August 2018      Published: 23 October 2018
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  02.30.Ik (Integrable systems)  
  32.80.Rm (Multiphoton ionization and excitation to highly excited states)  
Fund: Supported by the National Natural Science Foundation of China under Grant No 11534014, and the National Key R&D Program of China under Grant No 2017YFA0304500.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/35/11/110302       OR      https://cpl.iphy.ac.cn/Y2018/V35/I11/110302
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Wen-Bin He
Xi-Wen Guan
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