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Related Concept Videos

BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

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Related Experiment Video

Updated: Jul 2, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Optimal dynamical decoherence control of a qubit.

Goren Gordon1, Gershon Kurizki, Daniel A Lidar

  • 1Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel.

Physical Review Letters
|September 4, 2008
PubMed
Summary
This summary is machine-generated.

We developed a dynamical control theory using modulation to minimize qubit dephasing. This approach optimizes energy-constrained fields for reduced decoherence, enhancing quantum system stability.

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Area of Science:

  • Quantum physics
  • Quantum information science
  • Control theory

Background:

  • Quantum decoherence is a major obstacle in quantum computing.
  • Controlling quantum systems requires minimizing environmental interactions.
  • Qubit dephasing degrades quantum information.

Purpose of the Study:

  • To present a novel theory for dynamical control.
  • To achieve optimal decoherence reduction in qubits.
  • To minimize the average dephasing rate of a qubit.

Main Methods:

  • Developed a theory of dynamical control by modulation.
  • Utilized the non-Markovian Euler-Lagrange equation.
  • Formulated an energy-constrained field optimization.

Main Results:

  • The theory provides a method for optimal decoherence reduction.
  • Minimizes the average dephasing rate for a qubit.
  • Applicable for any given dephasing spectrum.

Conclusions:

  • Dynamical control by modulation offers a pathway to robust quantum systems.
  • The presented theory provides a framework for designing effective control fields.
  • This work contributes to the advancement of quantum information processing.