Two-loop corrections to the Lamb shift

TL;DR

This paper introduces a novel calculation of two-loop quantum electrodynamics corrections to the Lamb shift, employing advanced multi-loop calculation techniques to improve theoretical precision.

Contribution

It provides the first detailed computation of the order alpha^2 (Z alpha)^5 correction to the Lamb shift using innovative multi-loop methods.

Findings

Enhanced accuracy in Lamb shift theoretical predictions

First calculation of specific two-loop correction at this order

Methodology applicable to other quantum electrodynamics calculations

Abstract

We present a new calculation of the order alpha^2 (Z alpha)^5 correction to the Lamb shift, which uses methods developed for multi-loop calculations.