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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-8376
DTSTART:20230825T150000Z
DTEND:20230825T163000Z
DTSTAMP:20260413T182316Z
LAST-MODIFIED:20230804T175122Z
LOCATION:B343 Sterling
SUMMARY:Rydberg Physics in a Cryogenic System for Hybrid Quantum Inter
 faces\, Graduate Program Event\, Juan Camilo Bohorquez\, Department of
  Physics Graduate Student
DESCRIPTION:Rydberg atoms coupled to microwave cavities are promising 
 experimental platforms for the development of hybrid atom-superconduct
 ing quantum computing systems\, and the quantum transduction of microw
 ave quantum information into the telecom band. Experimental efforts to
  couple Rydberg atoms to two-dimensional microwave resonators face sig
 nificant challenges due to electric field noise near the cavity surfac
 es\, and the large dc polarizability of Rydberg states\, which scales 
 as $\\ds \\sim a_0^3 n^7$.<br>\n<br>\nIn this work we present experime
 ntal results in reducing the dc polarizability of Rydberg states by a 
 factor of 7\, using an off-resonant microwave dressing field. These ex
 perimental results are compared to a model for the dressed atom system
 . We also present analytical and numerical models for the excitation o
 f Cesium atoms to Rydberg states via a quadrupole-dipole excitation sc
 heme with reduced sensitivity to Doppler shifts\, a significant source
  of noise in entangling gates requiring ground-Rydberg coherence for h
 igh fidelity operation. These models are used to engineer an experimen
 tal effort which demonstrates the first Rydberg Rabi oscillations usin
 g this scheme. Finally\, we present a path forward for the Rydberg ato
 m-microwave cavity coupling effort\, using a bulk microwave cavity whi
 ch requires atoms be placed further from surfaces\, reducing the effec
 ts of dc electric field noise.
URL:https://www.physics.wisc.edu/events/?id=8376
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