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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1603
DTSTART:20090910T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260417T151533Z
LAST-MODIFIED:20090901T124231Z
LOCATION:5310 Chamberlin
SUMMARY:Emulating the dynamics of a quantum spin using a superconducti
 ng phase qudit\, R. G. Herb Condensed Matter Seminar\, Matthew Neeley\
 , University of California - Santa Barbara
DESCRIPTION:Quantum computers are typically thought of as being compos
 ed of qubits\, or two-level quantum systems.  However\, one can also u
 se qutrits (three-level systems) or general qudits (d-level systems) i
 n quantum information processing\, which can simplify certain computat
 ional tasks.  Like many physical realizations of qubits\, the supercon
 ducting phase qubit is a quantum system with multiple energy levels th
 at is usually operated as a qubit by restricting it to the lowest two 
 energy states.  Here\, we relax this restriction and instead use the h
 igher levels to operate this device as a qudit up to d=5.  We show how
  to manipulate and measure the qudit state\, and then use it to emulat
 e the dynamics of single spins with principal quantum number s=1/2\, 1
  and 3/2.  In particular\, we use this emulation to show the even (odd
 ) parity of integer (half-integer) spins under 2pi rotation.
URL:https://www.physics.wisc.edu/events/?id=1603
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