QEDMOD: Fortran program for calculating the model Lamb-shift operator

Abstract

We present Fortran package QEDMOD for computing the model QED operator hQED that can be used to account for the Lamb shift in accurate atomic-structure calculations. The package routines calculate the matrix elements of hQED with the user-specified one-electron wave functions. The operator can be used to calculate Lamb shift in many-electron atomic systems with a typical accuracy of few percent, either by evaluating the matrix element of hQED with the many-electron wave function, or by adding hQED to the Dirac–Coulomb–Breit Hamiltonian. Program summaryProgram title: QEDMODCatalogue identifier: AEVE_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEVE_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 22861No. of bytes in distributed program, including test data, etc.: 347504Distribution format: tar.gzProgramming language: Fortran 77.Computer: PCs or higher performance computers.Operating system: Linux, Windows, MacOS.RAM: Kilobytes.Classification: 2.1.Nature of problem:Fortran code for computation of a model QED operator that approximates the Lamb shift in many-electron atoms.Solution method:The method of solution is based on the algorithm developed in Ref. [1].Running time:Seconds.