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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3183
DTSTART:20140508T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260306T075119Z
LAST-MODIFIED:20140505T160556Z
LOCATION:5310 Chamberlin Hall
SUMMARY:On the way to understanding quantum matter: The death and rebi
 rth of quasiparticles\, R. G. Herb Condensed Matter Seminar\, Peter Wo
 lfle
DESCRIPTION:The low energy excitations of quantum matter generally hav
 e particle-like character. Their existence allows a relatively simple 
 and economical description of thermodynamic and transport properties o
 f condensed matter at low temperatures. However\, the stability of the
 se quasiparticles may be destroyed by fluctuations\, e.g. at a classic
 al or quantum phase transition into an ordered state. Inside the order
 ed phase the quasiparticles may be reborn in different form\, together
  with other kinds of new quasiparticles. Examples are quantum phase tr
 ansitions of metals into an antiferromagnetic or into a superconductin
 g/superfluid state. Fluctuations may be also enhanced by dimensional r
 eduction or by frustrating interactions\, leading to the appearance of
  new types of quasiparticles. As examples one-dimensional quantum wire
 s and the fractional quantum Hall effect will be considered\,where “
 holons” and “spinons” \, composite fermions and fractionally cha
 rged quasiparticles can be found
URL:https://www.physics.wisc.edu/events/?id=3183
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