# Absence of Physical Walls in Hot Gauge Theories

## TL;DR

This paper demonstrates that in the high-temperature deconfined phase of Z(2) lattice gauge theory, there are no physical walls, as the interface in Wilson lines is not physically meaningful and relates to flux configurations.

## Contribution

It shows that interfaces in the deconfined phase are not physical walls and interprets the interface energy through flux-based partition functions.

## Key findings

- No physical walls in the high-temperature phase.
- Interface energy relates to flux configuration differences.
- Wilson line interfaces are not physical in this regime.

## Abstract

This paper shows that there are no physical walls in the deconfined, high-temperature phase of Z(2) lattice gauge theory. In a Hamiltonian formulation, the interface in the Wilson lines is not physical. The line interface and its energy are interpreted in terms of physical variables. They are associated with a difference between two partition functions. One includes only the configurations with even flux across the interface. The other is restricted to odd flux.