Size-effect at finite temperature in a quark-antiquark effective model in phase space

TL;DR

This paper investigates how the size of a quark-antiquark system affects its quantum properties at finite temperature using a phase space approach, highlighting the importance of spin in the model.

Contribution

It introduces a finite-temperature, size-dependent quark-antiquark model in phase space incorporating spin effects and analyzes nonclassicality and fluctuations.

Findings

Size effect diminishes at all temperatures

Spin is a crucial factor in the model

Finite temperature influences quantum fluctuations

Abstract

A quark-antiquark effective model is studied in a toroidal topology at finite temperature. The model is described by a Schr\"odinger equation with linear potential which is embedded in a torus. The following aspects are analysed: (i) the nonclassicality structure using the Wigner function formalism; (ii) finite temperature and size-effects are studied by a generalization of Thermofield Dynamics written in phase space; (iii) in order to include the spin of the quark, Pauli-like Schr\"odinger equation is used; (iv) analysis of the size-effect is considered to observe the fluctuation in the ground state. The size effect goes to zero at zero, finite and high temperatures. The results emphasize that the spin is a central aspect for this quark-antiquark effective model.