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arXiv 1507.01414hep-th
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Hamiltonian量子色动力学的Dyson-Schwinger方法

Dyson--Schwinger approach to Hamiltonian Quantum Chromodynamics

Davide R. Campagnari, Hugo Reinhardt

摘要:

本文将库仑规范下的杨-米尔斯理论中提出并发展的量子场论哈密顿量中处理非高斯波泛函的一般方法推广到全量子色动力学。为此目的,QCD真空波泛函的夸克部分表示在相干费米子态的基础上,这是根据格拉斯曼变量定义的。我们对QCD真空波泛函的变分近似假设是由发生场中的多项式的指数给出的,并且包含夸克与胶子的显式耦合。利用Dyson-Schwinger方程技术,我们表达了各种$n$点函数,这是所需的期望值的观测量,如哈密顿量,在我们的试验分析的变分内核。最后通过最小化能量密度导出了这些变分核的运动方程。

英文摘要:

The general method for treating non-Gaussian wave functionals in the Hamiltonian formulation of a quantum field theory, which was previously proposed and developed for Yang--Mills theory in Coulomb gauge, is generalized to full QCD. For this purpose the quark part of the QCD vacuum wave functional is expressed in the basis of coherent fermion states, which are defined in term of Grassmann variables. Our variational ansatz for the QCD vacuum wave functional is assumed to be given by exponentials of polynomials in the occurring fields and, furthermore, contains an explicit coupling of the quarks to the gluons. Exploiting Dyson--Schwinger equation techniques, we express the various $n$-point functions, which are required for the expectation values of observables like the Hamiltonian, in terms of the variational kernels of our trial ansatz. Finally the equations of motion for these variational kernels are derived by minimizing the energy density.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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