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Andrew Higginbotham

IQUIST Seminar: "Thermally stabilized superconductivity and photon kinetics in Josephson junction arrays," Andrew Higginbotham, University of Chicago

Event Type
Seminar/Symposium
Sponsor
IQUIST
Location
190 Engineering Sciences Building, 1101 W Springfield Ave, Urbana, IL 61801
Date
Nov 12, 2024   11:00 - 11:50 am  
Speaker
Andrew Higginbotham, Assistant Professor, Department of Physics, University of Chicago
Contact
Stephanie Gilmore
E-Mail
stephg1@illinois.edu
Views
80
Originating Calendar
IQUIST Seminar Series

Thermally stabilized superconductivity and photon kinetics in Josephson junction arrays

Abstract: Superconducting resonators are technological building blocks for experiments in quantum computing, cosmology, and particle physics. Yet, despite their prevalence, in some limits they can exhibit rich and poorly understood behavior. Resonators formed from an array of Josephson junctions are a prime example. I will present two studies exploring their physics. The first study shows that apparent superconductivity persists for vastly weaker arrays 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 explores a source of dissipation arising from photon-photon interactions — photonic “friction”. I will discuss our current efforts to characterize both decay rates and kinetics associated with this effect.

Bio: Andrew Higginbotham is an Assistant Professor in the Department of Physics. Before joining the UChicago faculty, he was an Assistant Professor at IST Austria, a research scientist at Microsoft, and a National Research Council postdoctoral fellow at JILA/CU Boulder. He holds a BSc from Harvey Mudd College, MPhil from Cambridge University, and a PhD from Harvard University.

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

To watch online go to the IQUIST youtube channel:  https://www.youtube.com/channel/UCCzAySwQXF8J4kRolUzg2ww

For Zoom link you may check the IQUIST calendar weekly email or contact Stephanie Gilmore (stephg1@illinois.edu). To subscribe to our weekly email for event announcements, please go to https://lists.illinois.edu/lists/subscribe/iquist-announcements.

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