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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3281
DTSTART:20140207T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T193416Z
LAST-MODIFIED:20140203T141017Z
LOCATION:2241 Chamberlin Hall (coffee at 4:30 pm)
SUMMARY:Quantum Optics with Microwave Photons\, Physics Department Col
 loquium\, Maxim Vavilov\, University of Wisconsin Department of Physic
 s
DESCRIPTION:Recent experiments revealed the quantum nature of electrom
 agnetic fields of  superconducting circuits at microwave frequencies. 
  <br>
\n<br>
\nIndividual quanta of these fields are photons with ener
 gy a few million times smaller than the energy of an optical photon an
 d are extremely hard to detect.   A promising device for microwave pho
 ton detection is based on Josephson junctions.  Even a single microwav
 e photon with tiny energy is sufficient to switch a junction from the 
 superconducting to voltage state\, and detection of a photon reduces t
 o observation of voltage pulses across the junction.<br>
\n<br>
\nIn t
 his talk\,  I will present a theoretical model of a Josephson junction
  interacting with a quantized electromagnetic field and show that such
  Josephson photon detectors have relatively high efficiency of detecti
 on of microwave photons.  I will discuss application of such detectors
  to qubit readout for quantum information processing and to studies of
  photon emission statistics by quantum electronic devices. <br>
\n
URL:https://www.physics.wisc.edu/events/?id=3281
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