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Zeno effect for quantum computation and control.

Gerardo A Paz-Silva1, A T Rezakhani, Jason M Dominy

  • 1Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.

Physical Review Letters
|April 3, 2012
PubMed
Summary
This summary is machine-generated.

The quantum Zeno effect, using weak measurements and error correction, can protect quantum states from decoherence. This enables accurate quantum computation and control, advancing quantum information science.

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Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Quantum Error Correction

Background:

  • The quantum Zeno effect is known to protect quantum states from decoherence via projective measurements.
  • Quantum states are fragile and susceptible to environmental noise, limiting quantum computation.

Purpose of the Study:

  • To explore the use of the quantum Zeno effect in conjunction with weak measurements and quantum error correction.
  • To establish performance bounds for protecting quantum states using these combined techniques.
  • To enable universal quantum computation or control while maintaining state fidelity.

Main Methods:

  • Combining the theory of weak measurements with stabilizer quantum error correction and detection codes.
  • Deriving rigorous mathematical bounds on the performance of the proposed protection scheme.

Main Results:

  • Demonstrated that the quantum Zeno effect can protect encoded arbitrary quantum states to arbitrary accuracy.
  • Showed that this protection is compatible with universal quantum computation and control.

Conclusions:

  • The proposed method offers a robust way to protect quantum information.
  • This approach advances the feasibility of building fault-tolerant quantum computers and advanced quantum control systems.