The main style is revtex, and aps is a mandatory style option
for papers to be submitted to the APS. Other style options include
eqsecnum (to number equations by section), preprint (to get
double-spaced output for submission purposes), tighten (to get
single-spaced output with the preprint style), and amsfonts and
amssymb (see Sec. vii). There are also style options
for each APS journal: pra, prb, prc, prd,
pre, prl, and rmp for Physical Review A, B,
C, D, E, Letters, and Reviews of Modern
Physics respectively. pra is
the default. The prb option gives superscript reference citations,
as is the style for Physical Review B. The prl option yields
the slightly different line spacing of Letters (use for accurate
length estimates). Other than this, there are no substantial differences in
the journal options. Please do not use the prb option unless you
will be submitting to Physical Review B. The floats style
option enables LaTeX-style floating figures and tables---it is for an
author's personal use, and is not for use with files to be
submitted to the APS. All files submitted to the APS should have figures
and tables at the end of the file. Other arrangements may not be
accommodated by the compuscript program. Similarly, the twocolumn
style option is for personal use, and not for use in submitted files.