Theoretical, numerical, and experimental study of a flying qubit electronic interferometer - Archive ouverte HAL
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2014

Theoretical, numerical, and experimental study of a flying qubit electronic interferometer

Christoph Süssmeier
  • Fonction : Auteur
Shintaro Takada
Christoph Groth
  • Fonction : Auteur
Tristan Meunier
Michihisa Yamamoto
  • Fonction : Auteur
Seigo Tarucha
  • Fonction : Auteur
Xavier Waintal

Résumé

We discuss an electronic interferometer recently measured by Yamamoto et al. This "flying quantum bit" experiment showed quantum oscillations between electronic trajectories of two tunnel-coupled wires connected via an Aharanov-Bohm ring. We present a simple scattering model as well as a numerical microscopic model to describe this experiment. In addition, we present new experimental data to which we confront our numerical results. While our analytical model provides basic concepts for designing the flying qubit device, we find that our numerical simulations allow to reproduce detailed features of the transport measurements such as in-phase and anti-phase oscillations of the two output currents as well as a smooth phase shift when sweeping a side gate. Furthermore, we find remarkable resemblance for the magneto conductance oscillations in both conductance and visibility between simulations and experiments within a specific parameter range.

Dates et versions

hal-00993947 , version 1 (20-05-2014)

Identifiants

Citer

Tobias Bautze, Christoph Süssmeier, Shintaro Takada, Christoph Groth, Tristan Meunier, et al.. Theoretical, numerical, and experimental study of a flying qubit electronic interferometer. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89 (12), pp.125432. ⟨10.1103/PhysRevB.89.125432⟩. ⟨hal-00993947⟩
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