Landau-Zener-Stückelberg interferometry of a single electron charge qubit

J. Stehlik, Y. Dovzhenko, J. R. Petta, J. R. Johansson, F. Nori, H. Lu, A. C. Gossard

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

We perform Landau-Zener-Stückelberg interferometry on a single electron GaAs charge qubit by repeatedly driving the system through an avoided crossing. We observe coherent destruction of tunneling, where periodic driving with specific amplitudes inhibits current flow. We probe the quantum dot occupation using a charge detector, observing oscillations in the qubit population resulting from the microwave driving. At a frequency of 9 GHz we observe excitation processes driven by the absorption of up to 17 photons. Simulations of the qubit occupancy are in good agreement with the experimental data.

Original languageEnglish (US)
Article number121303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number12
DOIs
StatePublished - Sep 17 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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