# Effects of magnetic fields on quark-antiquark interactions

## TL;DR

This paper investigates how intense external magnetic fields influence quark-antiquark interactions using lattice QCD simulations, revealing anisotropic effects on the static potential and implications for confinement and phase transition temperatures.

## Contribution

It provides detailed lattice QCD analysis showing magnetic field-induced anisotropies in the quark potential and their impact on confinement properties and critical temperature.

## Key findings

- Magnetic fields induce anisotropies in the static quark potential.
- String tension decreases with increasing magnetic field, especially at high temperatures.
- External magnetic fields enhance the suppression of confinement, lowering the critical temperature.

## Abstract

We discuss some recent results obtained in the study of strong quark-antiquark interactions in the presence of intense external magnetic fields by means of lattice QCD simulations. We confirm previous findings and show that both at zero and finite temperature the external field induces anisotropies in the static quark potential. An in-depth study suggests that the effects are essentially due to the variation of the string tension whose angular dependence can be nicely parametrized by the first allowed term in a Fourier expansion. In the confined phase at high temperature, we observe that the suppression of the string tension is enhanced as the strength of the external field increases. Our results support the idea that the loss of confining properties is the dominant effect related to the decrease of $T_c$ as a function of $B$.