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SUMMARY:Thermal Simulations\, Open Boundary Conditions and Switches
DTSTART;VALUE=DATE-TIME:20170621T072000Z
DTEND;VALUE=DATE-TIME:20170621T074000Z
DTSTAMP;VALUE=DATE-TIME:20200219T032310Z
UID:indico-contribution-46@cern.ch
DESCRIPTION:Speakers: Mr. FLORIO\, Adrien (EPFL)\n$SU (N)$ gauge theories
on compact spaces have a non-trivial vacuum structure characterised by a c
ountable set of topological sectors and their topological charge. In latti
ce simulations\, every topological sector need to be explored a number of
times which reflects its weight in the path integral. Current lattice simu
lations are impeded by the so-called freezing of the topological charge pr
oblem. As the continuum is approached\, energy barriers between topologica
l sectors become well defined and the simulations get trapped in a given s
ector. A possible way out was introduced by Luescher using open boundary c
ondition in the time extent. However\, this solution cannot be used for th
ermal simulations\, where the time direction is required to be periodic. I
n this talk\, I will present results obtained using open boundary conditio
ns in space\, at non-zero temperature. With these conditions\, the topolog
ical charge is not quantised and the topological barriers are lifted. A do
wnside of this method are the strong finite size effects introduced by the
boundary conditions. To conclude\, I will present some exploratory result
s that show how these conditions can be used on an algorithmical level to
”reshuffle” the system and generate periodic configurations with non-z
ero topological charge.\n\nhttps://makondo.ugr.es/event/0/session/91/contr
ibution/46
LOCATION: Auditorio Manuel de Falla
URL:https://makondo.ugr.es/event/0/session/91/contribution/46
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