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Kazakov--Migdal Model with Logarithmic Potential and the Double Penner Matrix Model | | Lori Paniak
; Nathan Weiss
; | | Date: |
12 Dec 1994 | | Journal: | J.Math.Phys. 36 (1995) 2512-2530 | | Subject: | hep-th hep-lat | | Affiliation: | University of British Columbia), and Nathan Weiss (Weizmann Institute and University of British Columbia | | Abstract: | The Kazakov--Migdal (KM) Model is a U(N) Lattice Gauge Theory with a Scalar Field in the adjoint representation but with no kinetic term for the Gauge Field. This model is formally soluble in the limit $N
ightarrow infty$ though explicit solutions are available for a very limited number of scalar potentials. A ``Double Penner’’ Model in which the potential has two logarithmic singularities provides an example of a explicitly soluble model. We begin by reviewing the formal solution to this Double Penner KM Model. We pay special attention to the relationship of this model to an ordinary (one) matrix model whose potential has two logarithmic singularities (the Double Penner Model). We present a detailed analysis of the large N behavior of this Double Penner Model. We describe the various one cut and two cut solutions and we discuss cases in which ``eigenvalue condensation’’ occurs at the singular points of the potential. We then describe the consequences of our study for the KM Model described above. We present the phase diagram of the model and describe its critical regions. | | Source: | arXiv, hep-th/9501037 | | Services: | Forum | Review | PDF | Favorites | |
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