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DTSTAMP:20260424T143510Z
UID:62e8d1237642b307814157@ist.ac.at
DTSTART:20220829T150000
DTEND:20220829T160000
DESCRIPTION:Speaker: William D. Oliver\nhosted by Johannes Fink\nAbstract: 
 Models of light-matter interaction with natural atoms typically invoke the
  dipole approximation\, wherein atoms are treated as point-like objects co
 mpared with the wavelength of their resonant driving fields. In this talk\
 , we present a demonstration of giant artificial atoms realized with super
 conducting qubits in a waveguide QED architecture. The superconducting qub
 its couple to the waveguide at multiple\, well-separated locations. In thi
 s configuration\, the dipole approximation no longer holds\, and the giant
  atom may quantum mechanically self-interfere. This system enables tunable
  qubit-waveguide couplings with large on-off ratios and a coupling spectru
 m that can be engineered by design. Multiple\, interleaved qubits in this 
 architecture can be switched between protected and emissive configurations
 \, while retaining qubit-qubit interactions mediated by the waveguide. Usi
 ng this architecture\, we generate a Bell state with 94% fidelity\, despit
 e both qubits being strongly coupled to the waveguide. Time permitting\, w
 e also discuss recent advances in 3D integration of superconducting quantu
 m circuits.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:William D. Oliver: Engineering Giant Artificial Atoms and Waveguide
  QED
URL:https://talks-calendar.ista.ac.at/events/3891
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