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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1373
DTSTART:20081217T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T200506Z
LAST-MODIFIED:20081209T160451Z
LOCATION:5310 Chamberlin
SUMMARY:Electron Walks in Quantum Dot Nanostructures\, R. G. Herb Cond
 ensed Matter Seminar\, Leonid Fedichkin\, Institute for Quantum Scienc
 es & Dept. of Physics and Astronomy\, Michigan State University
DESCRIPTION:We investigate the dynamics of electron in a chain of coup
 led semiconductor quantum dots. The electron tunneling in a system is 
 considered in the presence of decoherence. The realization of a full s
 et of basic logic operations\, which are necessary for fulfillment of 
 quantum computations\, is possible. As the level of quantum noise and 
 the resulting decoherence increase\, we observe a crossover from a qua
 ntum-coherent oscillatory dynamics to a diffusive classical motion. Qu
 antum measurements performed in coupled quantum dot systems are diffic
 ult since the stationary state wave functions is not fully localized o
 n individual qubits. As a result\, an instantaneous projective single-
 qubit measurement gives the state population with an error. We show th
 at this type of errors may be significantly reduced.<br>
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URL:https://www.physics.wisc.edu/events/?id=1373
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