Rotating Strings in Confining AdS/CFT Backgrounds

TL;DR

This paper investigates semiclassical rotating strings in confining AdS/CFT backgrounds, revealing how short and long strings exhibit Regge trajectories and finite-size effects, respectively, with implications for understanding confinement in gauge theories.

Contribution

It provides a detailed analysis of rotating string solutions in confining backgrounds, highlighting the effects of finite size and confinement on the energy-spin relations.

Findings

Short strings follow Regge trajectories with expected string tension.

Long strings show a dispersion relation influenced by confinement and finite-size effects.

The string tension matches that measured by Wilson loops.

Abstract

We study semiclassical rotating strings in AdS/CFT backgrounds that exhibit both confinement and finite-size effects. The energy versus spin dispersion relation for short strings is the expected Regge trajectory behaviour, with the same string tension as is measured by the Wilson loop. Long strings probe the interplay between confinement and finite-size effects. In particular, the dispersion relation for long strings shows a characteristic dependence on the string tension and the finite-size scale.