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Updated: Jun 24, 2026

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

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Published on: June 8, 2018

Nonperturbative time-convolutionless quantum master equation from the path integral approach.

Guangjun Nan1, Qiang Shi, Zhigang Shuai

  • 1State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, People's Republic of China.

The Journal of Chemical Physics
|April 10, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed an exact time-convolutionless quantum master equation using path integrals. This method enables nonperturbative calculations of the dissipative tensor for quantum system dynamics.

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Area of Science:

  • Quantum mechanics
  • Quantum dynamics simulation

Background:

  • The time-convolutionless quantum master equation is standard for simulating quantum system reduced dynamics.
  • Current applications often rely on perturbative methods, limiting them to weak system-bath coupling.

Purpose of the Study:

  • To derive an exact time-convolutionless quantum master equation.
  • To enable nonperturbative calculations of the dissipative tensor.

Main Methods:

  • Path integral approach
  • Derivation of an exact time-convolutionless quantum master equation

Main Results:

  • A novel, exact time-convolutionless quantum master equation was derived.
  • The method allows for nonperturbative calculation of the dissipative tensor.

Conclusions:

  • The new method overcomes limitations of perturbative approaches.
  • Demonstrated application on an asymmetrical two-level system coupled to a harmonic bath.