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UID:UW-Physics-Event-9443
DTSTART:20251016T173000Z
DTEND:20251016T193000Z
DTSTAMP:20260413T084056Z
LAST-MODIFIED:20251003T200328Z
LOCATION:B343 Sterling
SUMMARY:Dielectric Loss in Superconducting Qubits\, Preliminary Exam\,
  Spencer Weeden\, Physics PhD Graduate Student
DESCRIPTION:Superconducting circuits are leading candidates for realiz
 ing quantum bits ("qubits"). To build a useful quantum computer\, it i
 s necessary to understand and mitigate energy relaxation in these qubi
 ts. Currently\, energy relaxation is dominated by amorphous oxide laye
 rs residing at circuit interfaces. Here we study energy relaxation as 
 a function of qubit frequency and time for various qubit geometries. W
 e compare our experimental results with Monte Carlo simulations\, and 
 develop a model that describes energy relaxation due to defects residi
 ng at the substrate-air interface and along the Josephson junction lea
 ds.
URL:https://www.physics.wisc.edu/events/?id=9443
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