Fast Electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins

  • Yoneda J
  • Otsuka T
  • Nakajima T
 et al. 
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Abstract

We demonstrate fast universal electrical spin manipulation with inhomogeneous magnetic fields. With fast Rabi frequency up to 127 MHz, we leave the conventional regime of strong nuclear-spin influence and observe a spin-flip fidelity > 96%, a distinct chevron Rabi pattern in the spectral-time domain, and a spin resonance linewidth limited by the Rabi frequency, not by the dephasing rate. In addition, we establish fast z rotations up to 54 MHz by directly controlling the spin phase. Our findings will significantly facilitate tomography and error correction with electron spins in quantum dots.

Author-supplied keywords

  • COHERENT MANIPULATION
  • COMPUTATION
  • OSCILLATIONS
  • QUBIT
  • RESONANCE
  • SEMICONDUCTORS
  • SPINTRONICS

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Authors

  • J. Yoneda

  • T. Otsuka

  • Takashi Nakajima

  • T. Takakura

  • T. Obata

  • M. Pioro-Ladrière

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