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DTSTAMP:20260815T222644Z
LAST-MODIFIED:20130403T155013Z
DTSTART:20130405T160000Z
DTEND:20130405T170000Z
UID:event1095@bu.edu
URL:http://physics.bu.edu/internal/events/show/1095
SUMMARY:Topology and Quantum Geometry in Flat Electronic Bands 
DESCRIPTION:Featuring Dr. Titus Neupert\, Paul Scherrer Institut\, Switzerl
	and\nHosted by: Claudio Chamon\n\nPart of the Biophysics Seminars.\n\nAbstr
	act:\n\nInteracting electrons populating spectrally flat bands are an inter
	esting playground to obtain strongly correlated topological states in conde
	nsed matter physics. While the fractional quantum Hall effect of electrons 
	in a strong magnetic field is the most prominent example of such a state\, 
	I will discuss a wider class of systems called fractional Chern insulators 
	that became a focus of intense research recently. These exotic many-body st
	ates are the result of a subtle interplay of topology and energetics\, aris
	ing from the noncommutative quantum geometry that electrons experience desp
	ite the spectral flatness of the band. I will show how algebraic properties
	 of the electronic position and density operators are determined by the Ber
	ry curvature and the quantum metric of single-particle states and how these
	 quantities influence\, respectively\, the topological response and the ene
	rgetics of the many-body state.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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