Currents and fluctuations of quantum heat transport in harmonic chains
peer-reviewed
Erstveröffentlichung
2017-05-16Authors
Motz, Thomas
Ankerhold, Joachim
Stockburger, Jürgen T.
Wissenschaftlicher Artikel
Published in
New Journal of Physics ; 19 (2017), 5. - Art.-Nr. 053013. - ISSN 1367-2630. - eISSN 1367-2630
Link to original publication
https://dx.doi.org/10.1088/1367-2630/aa68bdFaculties
Fakultät für NaturwissenschaftenInstitutions
Institut für Komplexe QuantensystemeDocument version
published version (publisher's PDF)Abstract
Abstract
Heat transport in open quantum systems is particularly susceptible to the modeling of system–reservoir interactions. It thus requires us to consistently treat the coupling between a quantum system and its environment. While perturbative approaches are successfully used in fields like quantum optics and quantum information, they reveal deficiencies—typically in the context of thermodynamics, when it is essential to respect additional criteria such as fluctuation-dissipation theorems. We use a non-perturbative approach for quantum dissipative dynamics based on a stochastic Liouville–von Neumann equation to provide a very general and extremely efficient formalism for heat currents and their correlations in open harmonic chains. Specific results are derived not only for first- but also for second-order moments, which requires us to account for both real and imaginary parts of bath–bath correlation functions. Spatiotemporal patterns are compared with weak coupling calculations. The regime of stronger system–reservoir couplings gives rise to an intimate interplay between reservoir fluctuations and heat transfer far from equilibrium.
DFG Project THU
Kooperative Quantenphänomene in Schaltkreisen mit Josephsonkontakten: Starkes Treiben, Photonenerzeugung und nicht-Gaußsches Rauschen / DFG / 214374243 [AN336/6-1]
Subject headings
[GND]: Quantenmechanisches System[LCSH]: Thermal conductivity
[Free subject headings]: quantum transport | thermal conduction in nonmetallic liquids | open quantum systems | 03.65.Yz | 05.60.Gg | 05.70.Ln | 66.25.+g
[DDC subject group]: DDC 530 / Physics
Metadata
Show full item recordDOI & citation
Please use this identifier to cite or link to this item: http://dx.doi.org/10.18725/OPARU-47292
Motz, Thomas; Ankerhold, Joachim; Stockburger, Jürgen T. (2023): Currents and fluctuations of quantum heat transport in harmonic chains. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. http://dx.doi.org/10.18725/OPARU-47292
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