标题： 伦敦极限下的紧致Q=2阿贝尔-希格斯模型：涡旋-磁单极链与光子传播子 显示英文标题

标题： The compact Q=2 Abelian Higgs model in the London limit: vortex-monopole chains and the photon propagator

摘要： 研究三维时空下具有双荷希格斯场的紧致阿贝尔-希格斯模型的限制性和拓扑性质。我们考虑了该模型的伦敦极限。我们证明单磁单极子会形成链状结构（由ANO涡旋维系在一起），其存在对于同时实现单荷粒子的永久限制和双荷粒子弦的破裂至关重要。在限制相中，这些链形成贯穿的团簇；而在去限制（希格斯）相中，这些链的尺寸是有限的。所描述的画面与限制性非阿贝尔规范模型中阿贝尔单极子和中心涡旋图像的综合极为相似。通过朗道规范中的光子传播子研究了真空的屏蔽特性。 显示英文摘要

摘要： The confining and topological properties of the compact Abelian Higgs model with doubly-charged Higgs field in three space-time dimensions are studied. We consider the London limit of the model. We show that the monopoles are forming chain-like structures (kept together by ANO vortices) the presence of which is essential for getting simultaneously permanent confinement of singly-charged particles and breaking of the string spanned between doubly-charged particles. In the confinement phase the chains are forming percolating clusters while in the deconfinement (Higgs) phase the chains are of finite size. The described picture is in close analogy with the synthesis of the Abelian monopole and the center vortex pictures in confining non--Abelian gauge models. The screening properties of the vacuum are studied by means of the photon propagator in the Landau gauge.