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SUMMARY:Exchange-diffusion Monte Carlo - Michael Hutcheon
DTSTART:20191023T103000Z
DTEND:20191023T113000Z
UID:TALK132565@talks.cam.ac.uk
CONTACT:77905
DESCRIPTION:Diffusion quantum Monte Carlo is a formally exact way to treat
  many-body quantum systems. Unfortunately\, for electronic systems it suff
 ers from the so-called fermion sign problem. In this talk I will demonstra
 te how the sign problem arises in a formally exact implementation of fermi
 onic diffusion Monte Carlo. I will go on to demonstrate how this exercise 
 informs the construction of alternative approximate (but asymptotically ex
 act) methods to the popular fixed-node approximation.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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