prorprl 8/94 PHYSICAL REVIEW LETTERS OR PHYSICAL REVIEW? 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. If a paper is more suitable (see below) for the Physical Review than for Physical Review Letters, it is in the author's interest to transfer the paper as soon as possible. Since many of the reasons for not accepting a submission for a Letter may also apply to acceptance as a Rapid Communication, authors should give careful consideration to submission to Physical Review as an Article or as a Brief Report. We encourage authors to follow a Rapid Communication or a Letter with the subsequent submission of a longer version of the same work, but significant additional material must be included. Neither Articles nor Brief Reports should be followed by such expanded articles. 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. Authors submitting papers as Rapid Communications should explain in a cover letter why the work justifies this 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.) PHYSICAL REVIEW RECEIVED DATE POLICY Papers transferred from Physical Review Letters or other Physical Review journals which are accepted without further review (and if the authors have not caused undue delays) will retain the original received date. In all other cases a new received date, which is the date of transfer, will be given. However, the authors may request that the original received date be retained.