Dresden 2026 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 42: Other Transport Topics

TT 42.4: Talk

Wednesday, March 11, 2026, 10:15–10:30, HSZ/0105

Universal relations between thermoelectrics and noise in mesoscopic transport across a tunnel junction — •Andrei Pavlov¹ and Mikhail Kiselev² — ¹TKM, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — ²The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34151 Trieste, Italy

We develop a unified theory of weakly probed differential observables for currents and noise in transport experiments. Our findings uncover a set of universal transport relations between thermoelectric and noise properties of a system probed through a tunnel contact, with the Wiedemann-Franz law being just one example of such universality between charge and heat currents. We apply this theory to various quantum systems, including multichannel Kondo, quantum Hall and Sachdev-Ye-Kitaev quantum dots, resonant impurity and two-stage Kondo models, and demonstrate that each of the microscopic theories is characterized by a set of universal relations connecting conductance and thermoelectrics with noise. Violations of these relations indicate additional energy scales emerging in a system.

Keywords: quantum transport; quantum noise; quantum dots; thermoelectrics; Kondo physics