Neutral Multi-Instanton as a Bridge from Weak to Strong Coupling phase in Two Dimensional QCD
| dc.creator | Ochiai, Tetsuyuki | |
| dc.date | 1995-12-04 | |
| dc.date.accessioned | 2026-07-07T04:21:42Z | |
| dc.date.available | 2026-07-07T04:21:42Z | |
| dc.description | Using a contour integral representation we analyze the multi-instanton sector in two dimensional $U(N)$ Yang-Mills theory on a sphere and argue the role of multi-instanton in the large $N$ phase transition. In the strong coupling region at the large $N$ , we encounter ``singular saddle point''. Because of this situation, ``neutral'' configurations of the multi-instanton are dominant in this region. Based on the ``neutral'' multi-instanton approximation we numerically calculate the multi-instanton amplitude , the free energies and the Wilson loops for finite $N$ . We also compare our results with the large $N$ exact solution of the free energy and the Wilson loop and argue some problems. We find the ``neutral'' multi-instanton contribution bridges the gap between weak and strong coupling phase. | |
| dc.description | 26pages, Latex, 7 Postscript figures included by epsf | |
| dc.identifier | https://arxiv.org/abs/hep-th/9512009 | |
| dc.identifier | http://arxiv.org/abs/hep-th/9512009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/54426 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Neutral Multi-Instanton as a Bridge from Weak to Strong Coupling phase in Two Dimensional QCD | |
| dc.type | text |