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Heat transport between two pure-dephasing reservoirs
1Instituto de Física, Universidade Federal de Mato Grosso, CEP 78060-900, Cuiabá MT, Brazil.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 14, 2015
Summary
This study demonstrates quantum heat transport between two reservoirs using pure-dephasing, driven by quantum coherence generated in a coupled system. This reveals a novel mechanism for thermal energy transfer in quantum systems.
Area of Science:
- Quantum physics
- Thermodynamics
- Condensed matter physics
Background:
- Pure-dephasing reservoirs typically cause decoherence without energy exchange in individual quantum systems.
- When applied to composite systems, dephasing can lead to unexpected phenomena beyond simple decoherence.
Purpose of the Study:
- To investigate the possibility of heat transport between two pure-dephasing Markovian reservoirs.
- To explore the role of quantum coherence in sustaining steady-state heat transport.
Main Methods:
- A theoretical model of coupled sites connected to two reservoirs at different temperatures.
- Microscopic derivation of non-unitary system-bath interactions for local site-reservoir couplings.
- Analysis of the steady-state regime to identify the mechanism of heat transport.
Main Results:
- Prediction of stationary heat transport between two pure-dephasing reservoirs.
- Demonstration that quantum coherence generated between sites is the underlying mechanism.
- Establishment of a quantum model for reservoirs as a necessary condition for this transport.
Conclusions:
- Pure-dephasing reservoirs can induce directed heat transport in composite quantum systems.
- Quantum coherence plays a crucial role in enabling and sustaining this non-trivial thermal transport.
- The findings open new avenues for controlling heat flow in quantum devices.
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