This template was downloaded from here (so it's rather old), but you probably don't really need a LaTeX template — APS provides a form-based submission interface that would eventually generate the PDF via LaTeX anyway. This template is here for you to preview you abstract — it may not exactly resemble the final output as generated by APS' submission page.
American Physical Society (uploaded by LianTze Lim)
Template for American Physical Society (APS) and American Institute of Physics (AIP) journals, including Physical Review Letters, Physical Review A-E, Physical Review X, Reviews of Modern Physics, Applied Phyiscs Letters, using the ReVTeX 4.2 document class.