Landau-Zener-Stückelberg interferometry in quantum dots with fast rise times: evidence for coherent phonon driving

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DOIResolve DOI: https://doi.org/10.1103/PhysRevLett.118.067701
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Name affiliation
  1. National Research Council of Canada. Security and Disruptive Technologies
  2. National Research Council of Canada. Measurement Science and Standards
  3. National Research Council of Canada. Medical Devices
FormatText, Article
Journal titlePhysical Review Letters
ISSN0031-9007
1079-7114
Volume118
Issue6
Article number067701
Pages# of pages: 5
Abstract
Manipulating qubits via electrical pulses in a piezoelectric material such as GaAs can be expected to generate incidental acoustic phonons. In this Letter we determine theoretically and experimentally the consequences of these phonons for semiconductor spin qubits using Landau-Zener-Stückelberg interferometry. Theoretical calculations predict that phonons in the presence of the spin-orbit interaction produce both phonon-Rabi fringes and accelerated evolution at the singlet-triplet anticrossing. Observed features confirm the influence of these mechanisms. Additionally, evidence is found that the pulsed gates themselves act as phonon cavities increasing the influence of phonons under specific resonant conditions.
Publication date
PublisherAmerican Physical Society
LanguageEnglish
Peer reviewedYes
NPARC number23002316
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