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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3111
DTSTART:20131114T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T211738Z
LAST-MODIFIED:20131105T193910Z
LOCATION:Chamberlin 5310
SUMMARY:Universal Features of Counting Statistics of Phase Slips in Su
 perconducting Nanocircuits\, R. G. Herb Condensed Matter Seminar\, Ale
 x Levchenko\, Michigan State University
DESCRIPTION:I will present a systematic study of the statistical prope
 rties of switching current distributions deduced from the measurements
  of phase-slip-induced switching events on different types of supercon
 ducting weak links. I will discuss three types of devices in which a w
 eak link is formed either by a superconducting nanowire\, a graphene f
 lake subject to proximity effect\, or a quantum dot. We demonstrate th
 at independently of the nature of the weak link\, higher moments of th
 e distribution take universal values. In particular\, the third moment
  (skewness) of the distribution is close to -1 both in thermal and qua
 ntum regimes. The fourth moment (kurtosis) also takes a universal valu
 e close to 5. The experimentally discovered universality of the cummul
 ants is confirmed by an analytical model.
URL:https://www.physics.wisc.edu/events/?id=3111
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