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Entanglement of spin-orbit qubits induced by Coulomb interaction

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Abstract

Spin-orbit qubit (SOQ) is the dressed spin by the orbital degree of freedom through a strong spin-orbit coupling (SOC). We show that Coulomb interaction between two electrons in quantum dots located separately in two nanowires can efficiently induce quantum entanglement between two SOQs. But to achieve the highest possible value for two SOQs concurrence, strength of SOC and confining potential for the quantum dots should be tuned to an optimal ratio. The physical mechanism to achieve such quantum entanglement is based on the feasibility of the SOQ responding to the external electric field via an intrinsic electric dipole spin resonance.

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Authors and Affiliations

  1. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing, 100190, P.R. China

    Yinan Fang, Yusuf Turek & Changpu Sun

  2. Beijing Computational Science Research Center, Beijing, 100084, P.R. China

    Jianqiang You & Changpu Sun

Authors
  1. Yinan Fang
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  2. Yusuf Turek
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  3. Jianqiang You
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  4. Changpu Sun
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Correspondence to Yinan Fang.

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Fang, Y., Turek, Y., You, J. et al. Entanglement of spin-orbit qubits induced by Coulomb interaction. Eur. Phys. J. B 87, 140 (2014). https://doi.org/10.1140/epjb/e2014-50172-7

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  • DOI: https://doi.org/10.1140/epjb/e2014-50172-7

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