Four dimensional non-critical strings
| dc.creator | Ferrari, Frank | |
| dc.date | 2002-05-16 | |
| dc.date | 2002-08-16 | |
| dc.date.accessioned | 2026-07-07T04:13:33Z | |
| dc.date.available | 2026-07-07T04:13:33Z | |
| dc.description | This is a set of lectures on the gauge/string duality and non-critical strings, with a particular emphasis on the discretized, or matrix model, approach. After a general discussion of various points of view, I describe the recent generalization to four dimensional non-critical (or five dimensional critical) string theories of the matrix model approach. This yields a fully non-perturbative and explicit definition of string theories with eight (or more) supercharges that are related to four dimensional CFTs and their relevant deformations. The space-time as well as world-sheet dimensions of the supersymmetry preserving world-sheet couplings are obtained. Exact formulas for the central charge of the space-time supersymmetry algebra as a function of these couplings are calculated. They include infinite series of string perturbative contributions as well as all the non-perturbative effects. An important insight on the gauge theory side is that instantons yield a non-trivial 1/N expansion at strong coupling, and generate open string contributions, in addition to the familiar closed strings from Feynman diagrams. We indicate various open problems and future directions of research. | |
| dc.description | 27 pages, 2 figures. Based on a talk given in Les Houches. v2: one erroneous formula corrected. v3: typos corrected | |
| dc.identifier | https://arxiv.org/abs/hep-th/0205171 | |
| dc.identifier | http://arxiv.org/abs/hep-th/0205171 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/51295 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Four dimensional non-critical strings | |
| dc.type | text |