\documentclass[aps,showpacs,showkeys,preprint]{revtex4}

The REVTeX 4.1 may be downloaded directly from here as revtex4-1.zip. REVTeX 4.1 is also available on CTAN.

To install REVTeX 4.1, unzip the revtex4-1.zip file. This will unpack a README file as well as an additional zip file, revtex4-1-tds.zip. The README file contains information about how to unpack and install the revtex4-1-tds.zip file. Briefly, this zip file contains all of the files in the REVTeX 4.1 distribution in the standard “TeX Directory Structure” (TDS) layout. Usually the file can be unzipped directly in the local tree of your TeX distribution (for TeX Live, this would be in the texmf-local directory).