Vacuum structure and chiral-symmetry breaking in (2+1)-dimensional lattice gauge theories with fermions.
Vacuum structure and chiral-symmetry breaking in (2+1)-dimensional lattice gauge theories with fermions.
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DOI：
10.1103/physrevd.46.814
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发表时间：
1992-07
期刊：
影响因子：
--
通讯作者：
Luo;Chen
中科院分区：
文献类型：
--
作者：
Luo;Chen
我们用费米子进一步研究了哈密顿晶格规范理论中的真空结构和手性对称破缺。关注（2 + 1）维系统。对于费米子扇区，采用了幺正变换和变分方法。在强耦合下，给出了单变换哈密顿量和介子作为自旋波的反铁磁性质，并讨论了高t (c)超导性的相关性。完整理论的真空态假定为变分费米子真空态和郭及其同事的纯规范理论的修正哈密顿量的精确基态的结合。同时指出了修正理论存在的问题。计算了QED3和QCD3中的手性缩聚物，并观察了交叉区缩聚行为。
We study further the vacuum structure and chiral-symmetry breaking in Hamiltonian lattice gauge theory with fermions. Attention is paid to (2 + 1)-dimensional systems. For the fermion sector, a unitary transformation and the variational method are employed. The antiferromagnetic nature of the unitarily transformed Hamiltonian and mesons as spin waves are presented at strong coupling, and the relevance for high-T(c) superconductivity is discussed. The vacuum state of the full theory is assumed to be the combination of the variational fermion vacuum state and the exact ground state of the modified Hamiltonian for pure gauge theory of Guo and co-workers. The existing problems in the modified theory are pointed out as well. The chiral condensates in QED3 and QCD3 are calculated and the scaling behavior is observed in the crossover regime.