Berlin 2024 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 21: Focus Session: Strongly Disordered Superconductors

TT 21.4: Hauptvortrag

Dienstag, 19. März 2024, 11:15–11:45, H 0104

Thermally enhanced superconductivity and photonic dissipation in Josephson junction arrays — •Andrew P. Higginbotham — James Franck Institute and Department of Physics, 929 E 57th St, Chicago, IL 60637, USA — IST Austria, Am Campus 1, 3400 Klosterneuburg, AT

I will present two studies exploring the limits of superconductivity in long Josephson junction arrays. The first study shows that apparent superconductivity persists for vastly weaker chains than expected within a zero-temperature theory. This behavior is consistent with thermal effects, which effectively melt the insulator and restore superconducting behavior [1]. The second study finds dissipation arising from photon-photon interactions. I will discuss the possible relevance of this dissipation as a source of photonic friction in equilibrium, and as a source of many-body stabilization in nonequilibrium.

[1] S. Mukhopadhyay et al., Nat. Phys. 19 (2023) 1630.

Keywords: phase transition; nonequilibrium; resonator