shortpapers-rf revised 3/01 Information for Referees: SHORT PAPERS The Physical Review publishes Articles, Rapid Communications, Brief Reports, and Comments. Except for Articles, these are limited in length. Each paper must have an abstract. Announcements of planned research and progress reports are not suitable for publication. A series of short papers by the same authors on a particular subject is discouraged; a comprehensive single regular article is preferred. We ask you as referee to consider if the material submitted as a Rapid Communication or a Brief Report would be more appropriately presented in a different short-paper section or (possibly in expanded form) as a regular Article. For Rapid Communications you should consider whether the paper is of sufficient general interest to justify consideration for Physical Review Letters. Short Regular ARTICLES Articles in the Physical Review} may be short; there is no minimum length limit. RAPID COMMUNICATIONS Rapid Communications are intended for important new results which deserve accelerated publication, and are therefore given priority in editorial processing and production to minimize the time between receipt and publication. We request that you also give them priority treatment. Rapid Communications are similar to Letters; the principal difference is that Letters are of broad interest and are accessible to a general audience of physicists and allied scientists, while Rapid Communications are primarily for a more specialized audience, the usual readers of a particular Physical Review journal (A, B, C, D, or E). BRIEF REPORTS Brief Reports are accounts of completed research which do not warrant regular Articles or the priority handling given to Rapid Communications; however, the same standards of scientific quality apply. (Addenda are included in Brief Reports.) COMMENTS Comments criticize or correct specific papers of other authors previously published in the Physical Review. Each Comment should state clearly to which paper it refers and should not contain polemics.