AdS/CFT Energy Loss in Time-Dependent String Configurations

TL;DR

This paper develops a general formula for calculating energy loss in time-dependent string configurations within the AdS/CFT framework, revealing new insights into jet quenching phenomena in heavy ion collisions.

Contribution

It introduces a novel formula linking spacetime momentum currents on a string worldsheet to energy loss in the dual field theory, especially for dynamic string setups.

Findings

Energy loss in falling strings lacks a late-time Bragg peak.

The new formula applies to time-dependent string configurations.

Implications for understanding jet quenching in heavy ion collisions.

Abstract

We analyze spacetime momentum currents on a classical string worldsheet, study their generic connection via AdS/CFT correspondence to the instantaneous energy loss of the dual field theory degrees of freedom and suggest a general formula for computing energy loss in a time-dependent string configuration. Applying this formula to the case of falling strings, generally dual to light quarks, reveals that the energy loss does not display a well-pronounced Bragg peak at late times, as previously believed. Finally, we comment on the possible implications of this result to the jet quenching phenomena in heavy ion collisions.