Erasing odd-parity states in semiconductor quantum dots coupled to superconductors

  title={Erasing odd-parity states in semiconductor quantum dots coupled to superconductors},
  author={Z. Su and R.Zitko and P. Zhang and H. Wu and D. Car and S. R. Plissard and S. Gazibegovic and G. Badawy and M. Hocevar and J. Chen and E. Bakkers and S. Frolov},
  journal={Physical Review B},
  • Z. Su, R.Zitko, +9 authors S. Frolov
  • Published 2020
  • Physics
  • Physical Review B
  • Quantum dots are gate-defined within InSb nanowires, in proximity to NbTiN superconducting contacts. As the coupling between the dot and the superconductor is increased, the odd-parity occupations become non-discernible (erased) both above and below the induced superconducting gap. Above the gap, conductance in the odd Coulomb valleys increases until the valleys are lifted. Below the gap, Andreev bound states undergo quantum phase transitions to singlet ground states at odd occupancy. We… CONTINUE READING
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