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Quantum control in spintronics.

A Ardavan1, G A D Briggs

  • 1The Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK. arzhang.ardavan@physics.ox.ac.uk

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|July 6, 2011
PubMed
Summary
This summary is machine-generated.

Quantum superposition and entanglement unlock powerful quantum computing and sensing. Researchers are advancing control over quantum spins in materials like GaAs, silicon, and diamond for new quantum technologies.

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Area of Science:

  • Quantum Physics
  • Condensed Matter Physics
  • Spintronics

Background:

  • Superposition and entanglement are fundamental quantum phenomena.
  • These phenomena enable quantum computing and offer correlations beyond classical limits.
  • Quantum spins in condensed matter are key for exploring and utilizing these effects.

Purpose of the Study:

  • To review the progress in quantum control of spin systems.
  • To highlight the potential of superposition and entanglement in spintronic devices.
  • To discuss applications in quantum computing, sensing, and metrology.

Main Methods:

  • Investigating quantum control of electron and nuclear spins in various materials.
  • Examining manipulation and measurement techniques for spin states.
  • Exploring collective spin states for information storage.

Main Results:

  • Demonstrated manipulation of individual electron spins in gallium arsenide (GaAs).
  • Achieved controlled singlet-triplet states in GaAs double-dot structures.
  • Enabled spin detection in silicon via phosphorus donors and spin transfer to nuclear spins.
  • Manipulated electron and nuclear spins in nitrogen-incarcerated fullerene molecules.
  • Optically controlled and read spin states of nitrogen vacancy centers in diamond.
  • Identified collective spin states for holographic storage.

Conclusions:

  • Conditions are optimal for implementing superposition and entanglement in spintronic devices.
  • This opens avenues for a new generation of quantum technologies.
  • Quantum spin systems offer diverse platforms for advancing quantum information processing and sensing.