{ "id": "1702.05523", "version": "v1", "published": "2017-02-15T22:50:42.000Z", "updated": "2017-02-15T22:50:42.000Z", "title": "The Vlasov equation and entropy", "authors": [ "E. E. Perepelkin", "B. I. Sadovnikov", "N. G. Inozemtseva" ], "comment": "22 pages", "categories": [ "cond-mat.stat-mech" ], "abstract": "It is well-known that the expression \\[m\\left\\langle {\\dot{\\vec{v}}} \\right\\rangle =\\vec{F}\\] is used at solving the Vlasov equation. This work shows that in general case \\[m\\left\\langle {\\dot{\\vec{v}}} \\right\\rangle \\ne m\\frac{d}{dt}\\left\\langle {\\vec{v}} \\right\\rangle =\\vec{F}.\\] It is shown that using substitution \\[m\\left\\langle {\\dot{\\vec{v}}} \\right\\rangle =\\vec{F}\\] narrows the class of the Vlasov equation as it corresponds to constant entropy systems. An equation form for the growing and constant entropy has been obtained.", "revisions": [ { "version": "v1", "updated": "2017-02-15T22:50:42.000Z" } ], "analyses": { "keywords": [ "vlasov equation", "constant entropy systems", "general case", "equation form", "well-known" ], "note": { "typesetting": "TeX", "pages": 22, "language": "en", "license": "arXiv", "status": "editable" } } }