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Wang ZH, Zheng Q, Wang X, et al. The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling. Sci Rep. 2016;6:22347doi: 10.1038/srep22347.
Wang, Z. H., Zheng, Q., Wang, X., & Li, Y. (2016). The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling. Scientific reports, 622347. https://doi.org/10.1038/srep22347
Wang, Z H, et al. "The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling." Scientific reports vol. 6 (2016): 22347. doi: https://doi.org/10.1038/srep22347
Wang ZH, Zheng Q, Wang X, Li Y. The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling. Sci Rep. 2016 Mar 02;6:22347. doi: 10.1038/srep22347. PMID: 26931762; PMCID: PMC4773991.
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Sci Rep. 2016 Mar 02;6:22347. doi: 10.1038/srep22347.

The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling.

Scientific reports

Z H Wang, Q Zheng, Xiaoguang Wang, Yong Li

Affiliations

  1. Center for Quantum Sciences, Northeast Normal University, Changchun 130117, China.
  2. Beijing Computational Science Research Center, Beijing 100094, China.
  3. School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China.
  4. Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou 310027, China.
  5. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.

PMID: 26931762 PMCID: PMC4773991 DOI: 10.1038/srep22347

Abstract

We study the energy-level crossing behavior in a two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anisotropic Rabi model, we obtain the approximate ground state and its quantum Fisher information (QFI) via performing a unitary transformation. We find that the energy-level crossing can occur in the quantum well system within the available parameters rather than in cavity and circuit quantum eletrodynamics systems. Furthermore, the influence of two kinds of SOCs on the QFI is investigated and an intuitive explanation from the viewpoint of the stationary perturbation theory is given.

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