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Towards realistic time-resolved simulations of quantum devices

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Abstract

We report on our recent efforts to perform realistic simulations of large quantum devices in the time domain. In contrast to d.c. transport where the calculations are explicitly performed at the Fermi level, the presence of time-dependent terms in the Hamiltonian makes the system inelastic so that it is necessary to explicitly enforce the Pauli principle in the simulations. We illustrate our approach with calculations for a flying qubit interferometer, a nanoelectronic device that is currently under experimental investigation. Our calculations illustrate the fact that many degrees of freedom (16,700 tight-binding sites in the scattering region) and long simulation times (9500 times the inverse bandwidth of the tight-binding model) can be easily achieved on a local computer.

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Authors and Affiliations

  1. Univ. Grenoble Alpes, INAC-SPSMS, 38000, Grenoble, France

    Joseph Weston & Xavier Waintal

  2. CEA, INAC-SPSMS, 38000, Grenoble, France

    Joseph Weston & Xavier Waintal

Authors
  1. Joseph Weston
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  2. Xavier Waintal
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Correspondence to Joseph Weston.

Additional information

This work was supported by the QTERA grant from the Agence Nationale de la Recherche (ANR) and the MESOQMC grant from the European Research Council. We thank Chris Baüerle, Grégoire Roussely and Shintaro Takada for interesting discussions.

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Weston, J., Waintal, X. Towards realistic time-resolved simulations of quantum devices. J Comput Electron 15, 1148–1157 (2016). https://doi.org/10.1007/s10825-016-0855-9

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  • DOI: https://doi.org/10.1007/s10825-016-0855-9

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