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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3515
DTSTART:20150423T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T124941Z
LAST-MODIFIED:20150415T184651Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Quantum Spins in Nanostructures: Coherence\, Measurement\, and
  Collective Dynamics\, R. G. Herb Condensed Matter Seminar\, Bill Cois
 h\, McGill University
DESCRIPTION:Qubit coherence measurements are now sufficiently accurate
  that they can be used to perform 'spectroscopy' of noise due to a com
 plex environment.  Measuring not only the decay time\, but also the fo
 rm of decay as a function of some external parameter (e.g. temperature
 ) can determine the nature of the dominant decoherence source.  I will
  describe how temperature-dependent measurements of qubit decoherence 
 time and form of decay can be used to identify microscopic dephasing s
 ources in a semiconductor environment.<br>
\n<br>
\nI will also briefl
 y discuss some new tricks to enhance the fidelity of generic qubit mea
 surements and prospects for generating and observing genuine collectiv
 e quantum effects in ensembles of nuclear spins embedded in silicon na
 nostructures.<br>
\n
URL:https://www.physics.wisc.edu/events/?id=3515
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