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Long-lived memory for mesoscopic quantum bits.

J M Taylor1, C M Marcus, M D Lukin

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.

Physical Review Letters
|June 6, 2003
PubMed
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Researchers developed a quantum memory technique using nuclear spins to store quantum information for seconds. This method enables efficient, reversible storage and manipulation of quantum states in mesoscopic systems.

Area of Science:

  • Quantum Information Science
  • Condensed Matter Physics
  • Quantum Computing

Background:

  • Quantum memory is crucial for quantum computing and communication.
  • Maintaining quantum coherence in mesoscopic systems is challenging.
  • Existing methods often suffer from short coherence times.

Purpose of the Study:

  • To present a novel technique for creating long-lived quantum memory.
  • To demonstrate reversible storage of quantum bits (qubits) using nuclear spins.
  • To investigate the feasibility and coherence properties of the proposed system.

Main Methods:

  • Mapping electronic spin coherence onto the collective nuclear spin state.
  • Utilizing standard resonance techniques for coherent transfer.

Related Experiment Videos

  • Analyzing the coherence properties of the mesoscopic system.

    • Main Results:

    • Achieved reversible storage of coherent superpositions on a second timescale.
    • Demonstrated efficient and fast coherent transfer between electronic and nuclear spins.
    • Showcased the potential for engineering entangled nuclear states.

    Conclusions:

    • The described technique offers a promising route to long-lived quantum memory.
    • This method allows for efficient manipulation and storage of quantum information.
    • The findings contribute to the development of robust quantum technologies.