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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Energy Exchange in Driven Open Quantum Systems at Strong Coupling.
Matteo Carrega1, Paolo Solinas1, Maura Sassetti1,2
1SPIN-CNR, Via Dodecaneso 33, 16146 Genova, Italy.
Physical Review Letters
|July 2, 2016
Summary
We studied energy transfer in driven quantum systems. Strong coupling to heat baths can make interactions the main dissipation channel, revealing quantum stochastic resonances.
Area of Science:
- Quantum physics
- Thermodynamics
- Condensed matter physics
Background:
- Understanding energy transfer in quantum systems is crucial for developing quantum technologies.
- Strong coupling to a heat bath introduces complex dynamics and dissipation.
- Previous models often simplified the interaction or coupling strength.
Purpose of the Study:
- To investigate time-dependent energy transfer in a driven quantum system strongly coupled to a heat bath.
- To derive exact formal expressions for energy dissipation statistics.
- To analyze the role of strong coupling in energy dissipation channels.
Main Methods:
- Influence functional approach to model quantum dynamics.
- Derivation of formal expressions for energy dissipation statistics.
- Application to a driven dissipative two-state system with Ohmic dissipation (K=1/2).
Main Results:
- Energy flows in the system obey a balance relation.
- Strong coupling can lead to the system-bath interaction being the dominant dissipation channel.
- Analytic results for Ohmic dissipation (K=1/2) reveal driving-induced coherences and quantum stochastic resonances.
- These characteristics persist for coupling values near K=1/2.
Conclusions:
- The influence functional approach provides exact expressions for energy dissipation statistics.
- Strong coupling significantly alters energy transfer pathways in driven quantum systems.
- Quantum stochastic resonances and driving-induced coherences are key phenomena in strongly coupled systems.
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