Interplay of charge and spin coherence in Landau-Zener-Stückelberg- Majorana interferometry

Hugo Ribeiro, J. R. Petta, Guido Burkard

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

We study Landau-Zener dynamics in a double quantum dot filled with two electrons, where the spin states can become correlated with charge states and the level velocity can be tuned in a time-dependent fashion. We show that a correct interpretation of experimental data is only possible when finite-time effects are taken into account. In addition, our formalism allows the study of partial adiabatic dynamics in the presence of phonon-mediated hyperfine relaxation and charge-noise-induced dephasing. Our findings demonstrate that charge noise severely impacts the visibility of Landau-Zener-Stückelberg- Majorana interference fringes. This indicates that charge coherence must be treated on an equal footing with spin coherence.

Original languageEnglish (US)
Article number235318
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number23
DOIs
StatePublished - Jun 26 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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