Browsing by Author "Barthel, C"

Now showing items 1-5 of 5

    • Fast Sensing of Double-Dot Charge Arrangement and Spin State with a Radio-Frequency Sensor Quantum Dot 

      Barthel, Christian; Kjærgaard, M.; Medford, James Redding; Stopa, Michael P; Marcus, Charles Masamed; Hanson, M. P.; Gossard, Arthur C. (American Physical Society, 2010)
      Single-shot measurement of the charge arrangement and spin state of a double quantum dot are reported with measurement times down to 100 ns. Sensing uses radio-frequency reflectometry of a proximal quantum dot in the Coulomb ...

    • Hyperfine-Mediated Gate-Driven Electron Spin Resonance 

      Laird, Elise Nicole; Barthel, C; Rashba, Emmanuel; Marcus, Carolyn; Hanson, Mark Jonathan; Gossard, A. C. (American Physical Society (APS), 2007)
      An all-electrical spin resonance effect in a GaAs few-electron double quantum dot is investigated experimentally and theoretically. The magnetic field dependence and absence of associated Rabi oscillations are consistent ...

    • A New Mechanism of Electric Dipole Spin Resonance: Hyperfine Coupling in Quantum Dots 

      Laird, Edward A.; Barthel, Christian; Rashba, Emmanuel; Marcus, Charles Masamed; Hanson, M. P.; Gossard, Arthur C. (Institute of Physics, 2009)
      A recently discovered mechanism of electric dipole spin resonance, mediated by the hyperfine interaction, is investigated experimentally and theoretically. The effect is studied using a spin-selective transition in a GaAs ...

    • Rapid Single-Shot Measurement of a Singlet-Triplet Qubit 

      Barthel, Christian; Reilly, David; Marcus, Charles Masamed; Hanson, M. P.; Gossard, Arthur (American Physical Society, 2009)
      We report repeated single-shot measurements of the two-electron spin state in a GaAs double quantum dot. The readout allows measurement with a fidelity above 90% with a ∼7  μs cycle time. Hyperfine-induced precession between ...

    • Relaxation and readout visibility of a singlet-triplet qubit in an Overhauser field gradient 

      Barthel, C; Medford, James Redding; Bluhm, H.; Yacoby, Amir; Marcus, C; Hanson, M. P.; Gossard, A. C. (American Physical Society (APS), 2012)
      Using single-shot charge detection in a GaAs double quantum dot, we investigate spin relaxation time (T1) and readout visibility of a two-electron singlet-triplet qubit following single-electron dynamic nuclear polarization ...