Entanglement dynamics of a Heisenberg chain with Dzyaloshinskii--Moriya interaction |
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| Authors: | Zheng Qiang Zhang Xiao-Ping Zhi Qi-Jun and Ren Zhong-Zhou |
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| Affiliation: | Department of Physics, Nanjing University, Nanjing 210093, China; School of Mathematics and Computer-Science, Guizhou Normal University, Guiyang 550001, China; School of Physics and Electronics, Guizhou Normal University, Guiyang 550001, China |
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| Abstract: | This paper investigates the entanglement dynamics of the system,
composed of two qubits A and B with Heisenberg XX spin
interactation. There is a third controller qubit C, which only
has Dzyaloshinskii--Moriya (DM) spin-orbit interaction with the
qubit B. It is found that depending on the initial state of the
controller qubit C and DM interaction, the entanglement of the
system displays amplification and sudden birth effects. These
effects indicate that one can control the entanglement of the
system, which may be helpful for quantum information processing. |
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| Keywords: | entanglement sudden birth entanglement amplification DM interaction |
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