{
  "id": "hep-th/9703118",
  "version": "v2",
  "published": "1997-03-17T11:20:00.000Z",
  "updated": "1997-03-23T11:02:33.000Z",
  "title": "BPS bound states, supermembranes, and T-duality in M-theory",
  "authors": [
    "J. G. Russo"
  ],
  "comment": "Expanded; additional equations and explanations, added figure on T-duality on 2-torus and a correction in figure 2. Latex, 42 pages. Lectures given at the APCTP Winter School \"Dualities of Gauge and String Theories\", Korea, February 1997",
  "categories": [
    "hep-th"
  ],
  "abstract": "This is an introductory review on the eleven-dimensional description of the BPS bound states of type II superstring theories, and on the role of supermembranes in M-theory. The first part describes classical solutions of 11d supergravity which upon dimensional reduction and T-dualities give bound states of NS-NS and R-R p-branes of type IIA and IIB string theories. In some cases (e.g. (q_1,q_2) string bound states of type IIB string theory), these non-perturbative objects admit a simple eleven-dimensional description in terms of a fundamental 2-brane. The BPS excitations of such 2-brane are calculated and shown to exactly match the mass spectrum for the BPS (q_1,q_2) string bound states. Different 11d representations of the same bound state can be used to provide inequivalent (T-dual) descriptions of the oscillating BPS states. This permits to test T-duality beyond perturbation theory and, in certain cases, to evade membrane instabilities by going to a stable T-dual representation. We finally summarize the results indicating in what regions of the modular parameter space a supermembrane description for M-theory on R^9 x T^2 seems to be adequate.",
  "revisions": [
    {
      "version": "v2",
      "updated": "1997-03-23T11:02:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "bps bound states",
      "string bound states",
      "modular parameter space",
      "simple eleven-dimensional description",
      "type iib string theory"
    ],
    "tags": [
      "lecture notes"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 42,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 441275,
      "adsabs": "1997hep.th....3118R"
    }
  }
}