BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-9224
DTSTART:20260130T213000Z
DTEND:20260130T223000Z
DTSTAMP:20260414T182435Z
LAST-MODIFIED:20260126T183622Z
LOCATION:Chamberlin 2241
SUMMARY:Atomtricity: From Gauge Field Theory to Transistors for Matter
  Waves\, Physics Department Colloquium\, Dana Z. Anderson\, Infleqtion
  and University of Colorado\, Boulder
DESCRIPTION:Gauge fields arise within a rather abstract theoretical fr
 amework for addressing interactions among sets of identical particles\
 ; it is central particularly to high-energy particle physics and has r
 ecently become of interest to the AMO and quantum information physics 
 communities. The canonical electronic transistor is a three-terminal d
 evice in which a weak signal can control a much stronger one.  The tra
 nsistor has a central role in nearly all modern electronics products. 
  This talk takes a fast-moving yet scenic path starting with gauge fie
 ld theory to describe the principles of transistors that operate on (u
 ltracold) atoms rather than electrons.  Historically gauge field theor
 y was developed to understand the fundamental particles and forces of 
 nature.  Notably\, Maxwell’s equations can be derived directly from 
 a gauge field theory that incorporates the speed of light and the impe
 dance of free space as empirical constraints (among a few others).  Ye
 t gauge field theory itself is agnostic as to whether particles and fo
 rces are or are not fundamental.  We have applied it to identical neut
 ral atoms that interact (such as ultracold 87Rb atoms) via van der Waa
 ls forces.  Imposing the laws of non-relativistic quantum mechanics ra
 ther than the laws of Relativity as constraints to the theory leads to
  a set of matter wave duals to Maxwell’s equations.  These ultimatel
 y lead to what one might refer to as the “laws of atomtricity” tha
 t are duals to the laws of electromagnetism.  These laws enable one to
  define and study the mechanics of AC matter waves\, i.e.\, waves that
  are associated with alternating particle currents.  Their behavior is
  dramatically different than the more familiar matter waves associated
  with the time-independent Schrödinger equation.  The laws of atomtri
 city naturally involve the concept of impedance\, which concept leads 
 to circuit elements\, and particularly to transistors and transistor c
 ircuits that can be used to generate AC matter waves.  Being an applie
 d physicist\, I cannot help but tell you how the new physics and matte
 r wave circuits can be useful.
URL:https://www.physics.wisc.edu/events/?id=9224
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