# Rigidly-rotating quantum thermal states in bounded systems

## TL;DR

This paper studies rigidly-rotating thermal states of a massless Klein-Gordon field within a cylinder, analyzing how Robin boundary conditions influence energy density and four-velocity in the Landau frame.

## Contribution

It introduces the relationship between Robin boundary condition parameters and physical quantities like energy density and four-velocity in rotating thermal states.

## Key findings

- Robin boundary conditions affect energy density distribution.
- The connection between RBC parameters and Landau frame quantities is established.
- Rotating thermal states are characterized within bounded cylindrical systems.

## Abstract

We consider rigidly-rotating thermal states of a massless Klein-Gordon field enclosed within a cylindrical boundary, where Robin boundary conditions (RBCs) are imposed. The connection between the parameter of the RBCs and the energy density and four-velocity expressed in the Landau frame is revealed.