Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 2: QED

Q 2.6: Talk

Monday, March 11, 2024, 12:15–12:30, HS 1015

Heat transport using nonreciprocal media — •Nico Strauß, Omar Jesús Franca Santiago, and Stefan Yoshi Buhmann — Institute of Physics, University of Kassel, 34132 Kassel, Germany

The second law of thermodynamics dictates that heat flows from warm to cold objects, thereby providing a direction of time [2]. In the optics of nonreciprocal media [1], an arrow of time is alternatively provided by the observation that optical paths cannot be reversed. How are these two notions compatible at the level of quantum electrodynamics? In order to answer this question, we calculate the nanoscale heat transfer between the surfaces of two planar nonreciprocal media, namely topological insulators which exhibit a temperature difference ΔT=T₁−T₂ . We analyse the impact of the nonreciprocal properties of the two plates on the heat transfer and investigate their interplay with the second law in the near-field regime.

[1] S. Y. Buhmann et al., New J. Phys. 14, 083034 (2012).

[2] Volokitin, A. I.; Persson, B. N. J. Rev. Mod. Phys. 4, 79 (2007).