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Condensed Matter Seminar - "Critical fluorescence of a transmon at the Schmid transition"

Event Type
Seminar/Symposium
Sponsor
Physics - Condensed Matter
Location
via Zoom
Virtual
wifi event
Date
Mar 5, 2021   1:00 pm  
Speaker
Leonid Glazman, Yale University
Contact
Stephen Bullwinkel
E-Mail
bullwink@illinois.edu
Phone
217-333-1652
Views
12
Originating Calendar
Physics - Condensed Matter Seminar

We investigate the quantum dynamics of a transmon qubit embedded in a high-impedance circuit. The transmon undergoes a charge-localization (Schmid) transition upon the impedance reaching a critical value. Due to the unique level structure of a transmon its microwave fluorescence spectrum carries a signature of the transition. The integrated intensity of the fluorescence spectrum yields the total cross-section of inelastic photon scattering. Our theory of the inelastic cross-section explains the recently measured quality factors of devices consisting of a transmon in a galvanic connection with a high-impedance array of Josephson junctions.  

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