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Universal and Nonperturbative Behavior in the One-Plaquette Model of Two-Dimensional String Theory
Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 3, pp. 414-429 Cet article a éte moissonné depuis la source Math-Net.Ru

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The one-plaquette Hamiltonian of large $N$ lattice gauge theory offers a constructive model of a (1+1)-dimensional string theory with a stable ground state. The free energy is found to be equivalent to the partition function of a string where the world sheet is discretized by even polygons with signature and the link factor is given by a non-Gaussian propagator. At large, but finite, $N$ we derive the nonperturbative density of states from the WKB wave function and the dispersion relations. This is expressible as an infinite, but convergent, series with the inverse of the hypergeometric function replacing the harmonic oscillator spectrum of the (1+1)-dimensional string. In the scaling limit, the series is shown to be finite, containing both the perturbative (asymptotic) expansion of the inverted harmonic oscillator model, and a nonperturbative piece that survives the scaling limit. 
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     author = {S. Chaudhuri and H. Itoyama and T. Ooshita},
     title = {Universal and {Nonperturbative} {Behavior} in the {One-Plaquette} {Model} of {Two-Dimensional} {String} {Theory}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {414--429},
     year = {1994},
     volume = {98},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1994_98_3_a10/}
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S. Chaudhuri; H. Itoyama; T. Ooshita. Universal and Nonperturbative Behavior in the One-Plaquette Model of Two-Dimensional String Theory. Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 3, pp. 414-429. http://geodesic.mathdoc.fr/item/TMF_1994_98_3_a10/

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