Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series STR-LPT-ENS-HE
Subjects hep-lat,hep-th
Date Tuesday 11 December 2018
Time 11:30
Institute LPTENS
Seminar Room LPTENS Library
Speaker's Last Name Gattringer
Speaker's First Name Christof
Speaker's Email Address
Speaker's Institution Graz University
Title Lattice field theory with worldlines and worldsheets
Abstract Path integrals for quantum field theories are usually defined in terms of field variables. When discretized on the lattice the partition sum can be mapped exactly to new variables, which are worldlines for matter and worldsheets for the gauge degrees of freedom. We illustrate this mapping for some examples and discuss various aspects of the new formulation. In particular the worldline/worldsheet approach can be used to solve some complex action problems, such that numerical simulations are possible also at finite chemical potential or in the presence of topological terms.
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