Speaker
Michele Caselle
(TO)
Description
We propose a new approach to the study of the interquark poten-
tial in LGTs. Instead of looking at the expectation value of
Polyakov loop correlators we study the modifications induced in the
chromoelectric flux due to the presence of the Polyakov loops.
This approach is particularly effective in the case of abelian LGTs where,
with a careful use of duality relations this study can be performed in a very
efficient way.
The major advantage of this numerical strategy is that it allows
to eliminate the dominant effective string correction to the interquark
potential (the Luscher term) thus giving an unique opportunity to test
higher order terms. Performing a set of simulations in the 3d
gauge Ising model we were thus able to precisely identify and measure
both the quartic and the sextic effective string corrections.
While the quartic term perfectly agrees with the
Nambu-Goto one the sextic term is definitely different. We discuss the
implications of this finding in view of the recent proof of the universality
of the sextic correction by Aharony and Karzbrun.
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Primary author
Michele Caselle
(TO)
