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arXiv math-ph/0212039math-phmath.MP
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时间规范的数学结构

Mathematical structure of the temporal gauge

J. Loeffelholz, G. Morchio, F. Strocchi

摘要:

的数学结构的时间规范的QED是严格审查的替代制剂的特点是无论是积极性或规律性的Weyl代数。时间平移不变性和高斯定律约束之间的冲突被证明是导致特殊的功能。在正的情况下,只存在场的指数关联(非正则性),空间平移不是强连续的,因此它们的生成元不存在,θ真空简并发生,与自发对称性破缺相关。在不确定的情况下,谱条件只在能量为正的情况下成立,在观测量上存在规范不变的θ-真空,在场代数上不扩展到时间平移不变态,真空忠实于纵向代数,出现KMS结构。函数积分表示在这两种情况下,与实随机场或复高斯随机场遍历措施之间的替代。

英文摘要:

The mathematical structure of the temporal gauge of QED is critically examined in both the alternative formulations characterized by either positivity or regularity of the Weyl algebra. The conflict between time translation invariance and Gauss law constraint is shown to lead to peculiar features. In the positive case only the correlations of exponentials of fields exist (non regularity), the space translations are not strongly continuous, so that their generators do not exist, a theta vacuum degeneracy occurs, associated to a spontaneous symmetry breaking. In the indefinite case the spectral condition only holds in terms of positivity of the energy, gauge invariant theta-vacua exist on the observables, with no extension to time translation invariant states on the field algebra, the vacuum is faithful on the longitudinal algebra and a KMS structure emerges. Functional integral representations are derived in both cases, with the alternative between ergodic measures on real random fields or complex Gaussian random fields.

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