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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1423
DTSTART:20090416T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T095532Z
LAST-MODIFIED:20090408T210708Z
LOCATION:5310 Chamberlin
SUMMARY:Quantum Control and Measurement of Spins in Cold Atomic Gases\
 , R. G. Herb Condensed Matter Seminar\, Ivan Deutsch\, University of N
 ew Mexico
DESCRIPTION:Spins are the natural carriers of quantum information give
 n their long coherence times and the mature methods for controlling th
 em with coherent rf.  Spins in atomic gases are of particular interest
  given their further isolation from a thermal condensed matter environ
 ment and our ability to manipulate them optically.  Laser cooling and 
 trapping\, optical pumping\, coherent Raman interactions\, and polariz
 ation spectroscopy are all tools in the arsenal that can be put to wor
 k.  In this talk I will review a series of developments in quantum con
 trol and measurement of spins in laser-cooled atomic samples\, with an
  eye towards quantum information processing.  In collaboration with Po
 ul Jessen\, College of Optical Science\, University of Arizona\, we ha
 ve designed and implemented tools for arbitrary state preparation in a
  large-dimensional hyperfine manifold\, and quantum-state reconstructi
 on in a single shot based on continuous weak measurement.  We have ext
 ended this control to the design of arbitrary unitary maps\, which wil
 l allow qudit logic on large spins.  Finally\, the coherent interactio
 n between spins is essential for scalable quantum information processi
 ng.  I will show how one perform quantum logic gates between nuclear s
 pins over tens of nanometers based on optical Feshbach resonances in a
 lkaline-earth-like atoms.
URL:https://www.physics.wisc.edu/events/?id=1423
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