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BEGIN:VEVENT
DTSTAMP:20260921T150304Z
LAST-MODIFIED:20150526T153523Z
DTSTART:20150603T150000Z
DTEND:20150603T160000Z
UID:event1451@bu.edu
URL:http://physics.bu.edu/internal/events/show/1451
SUMMARY:Artificial magnetic fields with ultracold atoms in optical lattices
	 and Chern-number measurement
DESCRIPTION:Featuring Dr. Monika Aidelsburger \,  Ludwig-Maximilians-Univer
	sity\, Munich\nHosted by: Marin Bukov\n\nPart of the Condensed Matter Theor
	y Seminar Series.\n\nAbstract:\nThe simulation of electrons moving in perio
	dic potentials exposed to large magnetic fields with ultracold atoms in opt
	ical lattices has motivated several successful experimental works about the
	 realization of uniform artificial magnetic fields. One main challenge in t
	his context is the implementation of experimental probes revealing the non-
	trivial topology of energy bands. Here I report about direct measurements o
	f the transverse Hall deflection of ultracold bosonic atoms in artificially
	 generated Hofstadter bands. In combination with the measured occupation of
	 the different Hofstadter bands we were able to obtain an experimental valu
	e for the Chern number of the lowest band with good precision. This result 
	constitutes the first Chern-number measurement in a non-electronic system. 
	The artificial magnetic field was generated using a new all-optical techniq
	ue\, which enables flux rectification in a staggered optical superlattice b
	ased on laser-assisted tunneling.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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