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DY: Fachverband Dynamik und Statistische Physik

DY 35: Fluctuations, Noise and Other Transport Topics (joint session TT/DY)

DY 35.3: Vortrag

Donnerstag, 20. März 2025, 15:30–15:45, H31

Thermodynamic and energetic constraints on out-of-equilibrium tunneling rates — Ludovico Tesser¹, •Matteo Acciai^2,1, Christian Spånslätt^3,1, Inès Safi⁴, and Janine Splettstoesser¹ — ¹Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Göteborg, Sweden — ²Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy — ³Department of Engineering and Physics, Karlstad University, Karlstad, Sweden — ⁴Laboratoire de Physique des Solides, CNRS-Université Paris-Sud and Paris-Saclay, Orsay, France

We consider a bipartite quantum system, where the two parts are kept at different temperatures and are connected by a tunnel coupling. In this setup, we show that the out-of-equilibrium tunneling rates between the two subsystems (depending on the applied temperature bias) are bounded by two constraints. The derived bounds are related to the dissipated heat and the absorbed energy neede to establish and deplete the temperature bias, thus providing a thermodynamic and energetic constraint on the tunneling rates.

Except for the restriction to the tunneling regime, our results are valid for arbitrary Hamiltonians of the two subsystems, that can include generic many-body interactions. The derived bounds thus apply to a large class of systems, such as molecular junctions and coupled cavities, and can be tested by measuring the out-of-equilibrium tunneling current and its fluctuations.

Based on: arXiv:2409.00981

Keywords: Quantum transport; Quantum thermodynamics; Noise in mesoscopic systems; Nonequilibrium quantum systems