Speaker
Description
The extraction of the static quark-antiquark potential from lattice QCD suffers from the poor signal-to-noise ratio of Wilson loops at large Euclidean times. To overcome this, smearing methods or the Coulomb gauge are used to improve the ground-state overlap with respect to the straight Wilson line trial state within the Wilson loop. We introduce a neural-network parametrization of trial states, constructed with gauge-equivariant layers and optimized with a loss function that favors the ground state. In quenched theory, our method achieves improved overlap compared to standard Wilson loops and is competitive with Wilson line correlators in Coulomb gauge. We further extend the framework to access excited states and outline a systematic strategy for their extraction.
| Parallel Session (for talks only) | Vacuum structure and confinement |
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