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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-4951
DTSTART:20181212T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T101438Z
LAST-MODIFIED:20181112T202827Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Creating and imaging atomic wave functions with diffraction-br
 eaking resolution\, Atomic Physics Seminar\, Dr. Yang Wang \,   Joint 
 Quantum Institute\, National Institute of Standards and Technology   a
 nd the University of Maryland
DESCRIPTION:Optical trapping and imaging of atoms plays an essential r
 ole in cold-atom physics\, ranging from precision measurement to the s
 tudy of correlated many body systems. Due to the diffraction limit\, t
 rapping and imaging are typically limited to length scales on the orde
 r of the wavelength of the light.  The nonlinear response of three-lev
 el atoms\, however\, supports a dark state with spatial structures muc
 h smaller than the wavelength.  In this talk\, I will present the expe
 rimental use of such dark state spatial structure to both create optic
 al potentials and probe the atomic wave function with a resolution of 
 lambda/50\, far below the diffraction limit. The optical potential phy
 sically realizes a Kronig-Penney lattice of near delta-function barrie
 rs with widths below 10nm. The coherent nature of our approach also pr
 ovides a fast temporal resolution (500 ns)\, with which we could obser
 ve the quantum motion of atoms inside the unit cell of an optical latt
 ice. 
URL:https://www.physics.wisc.edu/events/?id=4951
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