Effective Hamiltonian for scalar theories in the Gaussian approximation
Effective Hamiltonian for scalar theories in the Gaussian approximation
复制标题
高斯近似中标量理论的有效哈密顿量
DOI：
10.1002/andp.19975090403
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
H. Pirner
中科院分区：
文献类型：
--
作者：
H. Naus;T. Gasenzer;H. Pirner
We use a Gaussian wave functional for the ground state to reorder the Hamiltonian into a free part with a variationally determined mass and the rest. Once spontaneous symmetry breaking is taken into account, the residual Hamiltonian can, in principle, be treated perturbatively. In this scheme we analyze the O(1) and O(2) scalar models. For the O(2)‐theory we first explicitly calculate the massless Goldstone excitation and then show that the one‐loop corrections of the effective Hamiltonian do not generate a mass.
