Computational High Energy Physics

Introduction

Welcome to the Computational High Energy Physics (CHEP) group page. We pursue alternative, complementary approaches to numerical quantum field theory to those methods based on Monte Carlo approximations of the functional (path) integral. Our work is primarily focussed on obtaining `best' approximations, via methods of weighted residuals, to solutions of the Schwinger-Dyson equations. In the course of this work, we have asked many (and convincingly answered a few) questions concerning the basic formulation of quantum field theories.

On this page, we provide descriptions and pointers of recent publications, to member home pages, and to group facilities. Further information about the CHEP group can be obtained by sending inquiries to [email protected].

General Information

Some general information on lattice physics can be found here (by Daniel D Ferrante) and here (by Kostas Orginos).
Also, there is a mirror (a.k.a. 2-way gateway) of the sci.physics.research newsgroup here.

Members

Currently, the following people are affiliated with the CHEP group, either in the core at Brown University or via collaborative efforts:


Gerry Guralnik	Professor	Brown
Pinar Emirdag	Graduate Student	Brown
Dmitri Petrov	Graduate Student	Brown
Daniel D. Ferrante	Graduate Student	Brown
Stephen Hahn	Visiting Scientist
Richard Easther	Research Associate	Columbia
Santiago Garcia	Research Associate
Zach Guralnik	Research Associate	UPenn
John Lawson	Visting Assistant Professor	Clemson
Gregory Boyd	Undergraduate Student	Brown
Mickayel Mkrtchian	Undergraduate Student	Brown

Facilities

CHEP is a major participant in the Theoretical Physics Computing Facility at Brown University, directing funds from the Department of Energy towards the purchase of two Cray medium-scale supercomputer platforms, as well as a collection of workstations for code development and data analysis.

For production work, the group uses the remote large-scale supercomputing facilities at NERSC. We are beginning investigations into massively parallel algorithms, as applied to our large sets of nonlinear equations.

Help and Manuals

If you need help with *nix (Unix, Linux, Solaris, Irix, etc...) commands (mainly GNU applications), please try any of the following links:

Publications

The papers submitted in 2001:

P.Emirdag, R. Easther, G. S. Guralnik, S. C. Hahn and D. Petrov Numerical Quantum Field Theory on the Continuum and a New Look at Perturbation Theory

The papers submitted in 2000:

Dmitri Petrov, Richard Easther, Gerald Guralnik, Stephen Hahn, Wei-Mun Wang Fermions, Gauge Theories, and the Sinc Function Representation for Feynman Diagrams

The papers submitted in 1999:

P.Emirdag, R. Easther, G. S. Guralnik and S. C. Hahn, New Numerical Methods for Quantum Field Theories on the Continuum.

R. Easther, G. S. Guralnik and S. C. Hahn, The Sinc Function Representation and Three-Loop Master Diagrams.

Richard Easther, G. S. Guralnik and Stephen C. Hahn, Fast Evaluation of Feynman Diagrams.

A number of talks were given in 1998:

Stephen C. Hahn and G. S. Guralnik, Numerical field theory on the continuum.
Stephen C. Hahn and G. S. Guralnik, New numerical methods for iterative or perturbative solution of quantum field theory.

Professor G. Guralnik summarized his talk from June 1996 at the AUP Quantum Chromodynamics Workshop in Paris:

G. Guralnik, Source driven solutions of quantum field theories.

Zach Guralnik gave the following talk at the AUP Quantum Chromodynamics Workshop in Paris in June:

Z. Guralnik, Multiple Vacua and Boundary Conditions for Schwinger-Dyson equations.

The following two documents are from talks given at the Coral Gables conference this past spring:

G. Guralnik, Numerical quantum field theory using the source Galerkin method.
Z. Guralnik, Boundary conditions for Schwinger-Dyson equations and vacuum selection.

The paper from which these two talks derive is in final preparations. Some earlier papers are currently available on Professor Guralnik's page.

[email protected]