Gauge Invariant Variational Study of the Hamiltonian U(1) and ) Model and Critical Space-time Dimensionality
Nov, 19816 pages
Published in:
- Phys.Lett.B 110 (1982) 265-270
- Published: 1982
Report number:
- CERN-TH-3196
Citations per year
Abstract: (Elsevier)
Using a gauge-invariant variational formalism we find in D = 4 dimensions a first-order phase transition for Z 2,3,4 and two second ones for Z N with N ⩽ 5. At D = 3.2 the transitions of Z 2 and Z 4 become of second order, whereas that of Z 3 for D ⩽ 3 remains of first order. For D > 4 for all N the transition in Z N is first order. In the U(1) case for 3 < D < 4 there is a second-order transition so that the passage to the continuum limit is allowed, whereas for D > 4 there is only a first-order transition without any long-range correlation length; D = 4 appears therefore as the critical space-time dimensionality under which the theory exists in the continuum in agreement with the usual criterion of renormalizability. For D < 3 the U(1) model is always in the confining phase.- GAUGE FIELD THEORY: U(1)
- GAUGE FIELD THEORY: Z(N)
- LATTICE FIELD THEORY: HAMILTONIAN FORMALISM
- LATTICE FIELD THEORY: CRITICAL PHENOMENA
- LATTICE FIELD THEORY: FOUR-DIMENSIONAL
- LATTICE FIELD THEORY: THREE-DIMENSIONAL
- LATTICE FIELD THEORY: HIGHER-DIMENSIONAL
- LATTICE FIELD THEORY: VACUUM STATE
- LATTICE FIELD THEORY: ENERGY EIGENSTATE
- GAUGE FIELD THEORY: WILSON LOOP
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