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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2802
DTSTART:20121112T223000Z
DURATION:PT1H0M0S
DTSTAMP:20240319T050803Z
LAST-MODIFIED:20121112T172630Z
LOCATION:5310 Chamberlin
SUMMARY:Quantum Optics with Quantum Dots and Microwave Resonators: Pho
ton and Electron Statistics\, Condensed Matter Theory Group Seminar\,
Maxim Vavilov
DESCRIPTION:I will discuss electron transport through a double quantum
dot system coupled to a microwave resonator. First\, I analyze the p
hotovoltaic current produced at zero bias across the dots in the prese
nce of microwave drive of the resonator. The conversion of photons to
electronic excitations produces an electric current. I show that cer
tain features of this current are due to quantum nature of the electro
magnetic field in the resonator. In particular\, the photovoltaic cur
rent exhibits a double peak dependence on the frequency of an external
microwave source.
\n
\nThe distance between the peaks is det
ermined by the strength of interaction between a single photon in the
resonator and electrons in the double quantum dot. This double peak fe
ature disappears as strengths of energy and phase relaxation processes
increases\, recovering a simple classical condition for maximal curre
nt when the energy splitting between electronic states in the double q
uantum dot is equal to the photon energy. Then I discuss properties of
electric current and photon field at finite bias across the DQD syste
m and at zero microwave drive. I show that the low frequency current
noise is affected by the coupling to photons and that the generated mi
crowave field of the resonator may exhibit either photon bunching or a
ntibunching.
\n
URL:https://www.physics.wisc.edu/events/?id=2802
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