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Updated: Sep 29, 2025
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
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Non-Markovian Quantum Dynamics in a Squeezed Reservoir.
Valentin Link1, Walter T Strunz1, Kimmo Luoma1,2
1Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany.
Entropy (Basel, Switzerland)
|March 25, 2022
Summary
We explored non-Markovian dynamics in open quantum systems interacting with squeezed reservoirs. The Redfield master equation accurately captures asymptotic oscillations in stationary states, showing bath squeezing influences dissipation strength.
Area of Science:
- Quantum physics
- Open quantum systems
- Quantum dynamics
Background:
- Studying open quantum systems is crucial for understanding quantum phenomena.
- Non-Markovian dynamics and squeezed reservoirs present unique challenges in quantum system analysis.
Purpose of the Study:
- To derive exact and approximate descriptions for open quantum system dynamics.
- To investigate the effects of a nonstationary squeezed bosonic reservoir on system dynamics.
- To compare different theoretical approaches for modeling these dynamics.
Main Methods:
- Developed exact and approximate descriptions for open quantum system dynamics.
- Focused on the spin boson model for detailed analysis.
- Compared exact dynamics with Redfield theory and quantum optical master equations.
- Analyzed dynamics in both non-Markovian and Markovian regimes, and for short and long times.
Main Results:
- The squeezing of the bath leads to asymptotic oscillations in the stationary state.
- Redfield master equation accurately captures these oscillations under weak coupling.
- The direction of bath squeezing modifies the effective system-environment coupling strength.
- Dissipation strength is directly influenced by bath squeezing.
Conclusions:
- Nonstationary squeezed bosonic reservoirs significantly impact open quantum system dynamics.
- Redfield theory provides a reliable approximation for certain aspects of these dynamics.
- Understanding these interactions is key for controlling and predicting quantum system behavior.
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