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SUMMARY:Sign problem and the generalized thimble method
DTSTART;VALUE=DATE-TIME:20180206T103000Z
DTEND;VALUE=DATE-TIME:20180206T113000Z
DTSTAMP;VALUE=DATE-TIME:20180225T112717Z
UID:indico-event-6210@cern.ch
DESCRIPTION:Questions about quantum field theories at non-zero chemical po
tential and/or real-time correlators are often impossible to investigate n
umerically due to the notorious sign problem. A possible solution to this
problem is to deform the integration domain for the path integral in the c
omplex plane. We describe a family of such deformations\, built using the
holomorphic gradient flow\, that interpolate between the original integrat
ion domain (where the sign problem is severe) and the union of relevant th
imbles (where the sign problem is mild but a multimodal probability distri
bution complicates the Monte Carlo sampling). We show how this works in a
fermionic model and for computing real time correlators for a simple therm
al quantum field theory.\n\nhttps://indico.tifr.res.in/indico/conferenceDi
splay.py?confId=6210
LOCATION: AG69
URL:https://indico.tifr.res.in/indico/conferenceDisplay.py?confId=6210
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