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Second order phase transition in two dimensional sine-Gordon field theory—Lattice model |
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| Authors: | K Babu Joseph V C Kuriakose |
| Institution: | (1) Department of Physics, Cochin University, 682 022 Cochin |
| Abstract: | Two dimensional sine-Gordon (SG) field theory on a lattice is studied using the single-site basis variational method of Drell and others. The nature of the phase transition associated with the spontaneous symmetry breakdown in a SG field system is clarified to be of second order. A generalisation is offered for a SG-type field theory in two dimensions with a potential of the from cos n (√λ/m)ϕ−1]. |
| Keywords: | Sine-Gordon system lattice formulation variational techniques in field theory phase transition Simon-Griffiths theorem spontaneous symmetry breaking |
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