Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 63: Poster: Enabling Technologies: Quantum Materials, Quantum Dots, Quantum Wires, Point Contacts and Superconducting Systems
FM 63.8: Poster
Mittwoch, 25. September 2019, 16:30–18:30, Tents
Quantum thermodynamics in driven nanosystems: A hierarchical quantum master equation approach — •Jakob Bätge1, Wenjie Dou2, Amikam Levy2, and Michael Thoss1 — 1Institute of Physics, University of Freiburg, Freiburg, Germany — 2Department of Chemistry, University of California, Berkeley, USA
For the development and optimization of macroscopic engines thermodynamics is fundamental. In view of the tremendous recent progress in experimental techniques to study charge and heat transport in nanostructures based on single atoms or molecules [1], theoretical research on the impact of quantum fluctuations on thermodynamic laws at the nanoscale is of significant interest [2,3].
In this context, we investigate nanosystems with electronic and vibrational degrees of freedom, which are exposed to an environment in nonequilibrium. In particular, we are interested in thermodynamic quantities of driven nanosystems. For this purpose, we use the hierarchical quantum master equation method [4], which generalizes perturbative master equation methods by including higher-order contributions as well as non-Markovian memory and allows for the systematic convergence of the results. This approach allows for treating fermionic and bosonic environments on equal footing.
[1] L. Cui et al., Science 355, 1192 (2017).
[2] R. S. Whitney et al., Phys. Rev. B 98, 085415 (2018).
[3] W. Dou et al., Phys. Rev. B 98, 134306 (2018).
[4] C. Schinabeck et al., Phys. Rev. B 94, 201407(R) (2016).