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BEGIN:VEVENT
DTSTAMP:20260921T003518Z
LAST-MODIFIED:20200123T172019Z
DTSTART:20200129T211500Z
DTEND:20200129T221500Z
UID:event2285@bu.edu
URL:http://physics.bu.edu/internal/events/show/2285
SUMMARY:The Complex Langevin approach to the Sign Problem of Lattice Field 
	Theory
DESCRIPTION:Featuring Casey E. Berger\, University of North Carolina\, Chap
	el Hill\n\nPart of the HET Seminar Series.\n\nQuantum field theories with a
	 complex action appear across energy scales\, from condensed matter physics
	 to lattice QCD\, and they suffer from a sign problem in stochastic nonpert
	urbative treatments. This means that many systems of great interest – suc
	h as polarized or mass-imbalanced fermions and QCD at finite baryon density
	 – are extremely challenging to treat numerically. Another such system is
	 that of bosons at finite angular momentum. Experimentalists have successfu
	lly achieved vortex formation in supercooled bosonic atoms and have measure
	d quantities of interest such as the moment of inertia. However\, the rotat
	ion results in a complex action\, making the usual numerical treatments of 
	the theory unusable. The use of the complex (Langevin) stochastic  quantiza
	tion is presented to overcome the sign problem and calculate basic properti
	es of interacting bosons at finite angular momentum.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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