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Related Experiment Videos

Gigahertz electron spin manipulation using voltage-controlled g-tensor modulation.

Y Kato1, R C Myers, D C Driscoll

  • 1Center for Spintronics and Quantum Computation, University of California, Santa Barbara, CA 93106, USA.

Science (New York, N.Y.)
|January 25, 2003
PubMed
Summary
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We demonstrate gigahertz-bandwidth 3D electron spin control in semiconductors using a single voltage signal. This method achieves electron spin resonance without time-dependent magnetic fields, enabling local quantum spin manipulation.

Area of Science:

  • Solid State Physics
  • Quantum Information Science
  • Semiconductor Spintronics

Background:

  • Electron spin control is crucial for quantum computing and spintronics.
  • Traditional methods often require complex or time-dependent magnetic fields.
  • Developing electrical control methods is a key challenge in semiconductor spintronics.

Purpose of the Study:

  • To present a novel scheme for high-bandwidth, three-dimensional control of electron spins.
  • To demonstrate electrical manipulation of quantum spin information in semiconductor heterostructures.
  • To achieve electron spin resonance-like effects using only voltage signals.

Main Methods:

  • Utilizing microwave modulation of the Landé g tensor in a semiconductor heterostructure.

Related Experiment Videos

  • Applying a single voltage signal to induce frequency-modulated electron spin precession.
  • Driving the system at the Larmor frequency to achieve g-tensor modulation resonance.

    • Main Results:

    • Achieved gigahertz-bandwidth three-dimensional control of electron spins.
    • Demonstrated frequency-modulated electron spin precession via g-tensor modulation.
    • Established g-tensor modulation resonance as an electrical alternative to magnetic resonance.

    Conclusions:

    • The presented scheme enables efficient electrical control of electron spins.
    • This work validates the concept of local quantum spin manipulation using high-speed electrical circuits.
    • The findings pave the way for advanced spintronic devices and quantum information processing.