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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:20240319T011654Z
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.
\n
\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.
\n
\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.
\n
URL:https://www.physics.wisc.edu/events/?id=3281
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