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Dissipatons as generalized Brownian particles for open quantum systems: Dissipaton-embedded quantum master equation
Xiang Li1, Yu Su2, Zi-Hao Chen1
1CAS Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.
The Journal of Chemical Physics
|June 1, 2023
Summary
Dissipaton theory offers an exact method for open quantum systems. A new dissipaton-embedded quantum master equation (DQME) reveals dissipatons as Brownian particles, aiding environmental mode analysis.
Area of Science:
- Quantum Dynamics
- Theoretical Chemistry
- Statistical Physics
Background:
- Open quantum system dynamics are challenging to model exactly.
- Dissipaton theory uses quasi-particles to represent environmental influence.
- Existing methods require further development for direct statistical analysis.
Purpose of the Study:
- To establish an equivalent quantum master equation for dissipaton theory.
- To enable direct investigation of dissipaton statistical properties.
- To analyze the hybrid bath modes supporting quantum systems.
Main Methods:
- Revisiting the dissipaton equation of motion theory.
- Establishing a dissipaton-embedded quantum master equation (DQME).
- Applying DQME to an electron transfer model for numerical demonstration.
Main Results:
- Dissipatons are shown to be generalized Brownian particles within DQME.
- DQME provides a direct route to study dissipaton statistics.
- Transient statistical properties of the solvation coordinate were observed in the electron transfer model.
Conclusions:
- The developed DQME is an effective tool for analyzing open quantum systems.
- This approach facilitates a deeper understanding of environmental effects via dissipatons.
- The findings offer new avenues for studying quantum phenomena in complex environments.
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