梯形自旋链的一种规范场论的形式

摘要

We consider a massless fermion interacting with the gauge field by Pauli interaction in which the coupling constant is dimensionless. The model is equivalent to the s=1/2 antiferromagnetic XXZ spin chain. The two flavours massless fermion of such model can describe the two-leg spin ladder system qualitatively, and there is no gapless exitation in such a system.%考虑无质量费米场和规范场的Pauli相互作用项的系统，在这一理论中耦合常数为无量纲量. 该模型等价于自旋1/2反铁磁XXZ量子链. 如在模型中引入费米场的味自由度，则可定性描述二条自旋链的梯形结构系统. 在这一系统中不再存在无能隙激发.