Title: Jakob Bätge: Heat transport in nanosystems: A hierarchical quantum master equation approach
Number: 67/19
Status: Closing date exceeded
Begin: Thursday, 21.11. 2019, 13:00
Tutor: Tomáš Novotný
Location: Thursday 21.11.2019 at 13:00, Ke Karlovu 5, Praha 2 in Seminar room F052

Thursday 21 November 2019 at 13:00 in Seminar room F052

MSc. Jakob Bätge

Albert Ludwigs University, Institute of Physics, Freiburg, Germany

Heat transport in nanosystems: A hierarchical quantum master equation approach

A variety of interesting transport phenoma exist in nanoelectronic systems. Recently, quantization of heat transport has been observed [1] and counterintuitive thermal stabilization in molecular junctions has been predicted [2]. We investigate voltage and temperature driven electron and heat transport from a theoretical point of view. In particular, we are interested in the interplay of electronic and vibrational degrees of freedom. For this purpose, we use the hierarchical quantum master equation method [3], 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. Furthermore, the chosen approach allows for dealing fermionic and bosonic environments on equal footing.

[1] L. Cui et al., Science 355, 1192 (2017).
[2] R. Härtle et al., Phys. Rev. B 98, 081404(R) (2018).
[3] C. Schinabeck et al., Phys. Rev. B 94, 201407(R) (2016).