Lattice model in three dimensions with a θ term -: art. no. 114501

被引：0
|
作者：
Cheluvaraja, S [1 ]
机构：
[1] Inst Math Sci, Tharamani 600113, Chennai, India
来源：
PHYSICAL REVIEW D | 2000年 / 61卷 / 11期
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study a three-dimensional Abelian lattice model in which the analogue of a theta term can be defined. This term is defined by introducing a neutral scalar field, and its effect is to couple magnetic monopoles to the scalar field and vortices to the gauge field. an interesting feature of this model is the presence of an exact duality symmetry that acts on a three-parameter space. It is shown that this model has an interesting phase structure at nonzero values of theta. In addition to the usual confinement and vortex phases there are phases in which loops with composite charges condense. The presence of novel pointlike excitations also alters the physical properties of the system.
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页数：12
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