Direct reconstruction of the dark energy scalar-field potential

Chao Li, Daniel E. Holz, and Asantha Cooray California Institute of Technology, Mail Code 130-33, Pasadena, California 91125, USA Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA, and Department of Astronomy & Astrophysics, University of Chicago, Chicago, Illinois 60637, USA The Observatories of the Carnegie Institution of Washington, Pasadena, California 91101, USA Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, California 92697, USA (Received 28 November 2006; published 3 May 2007)