Buividovich, P. V. and Dunne, Gerald V. and Valgushev, S. N. (2016) Complex Path Integrals and Saddles in Two-Dimensional Gauge Theory. PHYSICAL REVIEW LETTERS, 116 (13): 132001. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We study numerically the saddle point structure of two-dimensional lattice gauge theory, represented by the Gross-Witten-Wadia unitary matrix model. The saddle points are, in general, complex valued, even though the original integration variables and action are real. We confirm the trans-series and instanton gas structure in the weak-coupling phase, and we identify a new complex-saddle interpretation of nonperturbative effects in the strong-coupling phase. In both phases, eigenvalue tunneling refers to eigenvalues moving off the real interval, into the complex plane, and the weak-to-strong coupling phase transition is driven by saddle condensation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHASE-TRANSITION; MATRIX MODELS; STRING THEORY; INSTANTONS; BEHAVIOR; QCD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Mar 2019 09:23 |
| Last Modified: | 25 Mar 2019 09:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3218 |
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