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Andrea Quadri
Researcher at University of Milan
Publications - 94
Citations - 1054
Andrea Quadri is an academic researcher from University of Milan. The author has contributed to research in topics: BRST quantization & Gauge theory. The author has an hindex of 20, co-authored 92 publications receiving 1003 citations. Previous affiliations of Andrea Quadri include University of Freiburg & Istituto Nazionale di Fisica Nucleare.
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Algebraic Aspects of the Background Field Method
TL;DR: In this paper, the authors considered a BRST doublet where the background field entered with a non-zero BRST transformation and showed that the resulting functional W bg has the same physical amplitudes as the original one.
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A Weak Power-Counting Theorem for the Renormalization of the Non-Linear Sigma Model in Four Dimensions
Ruggero Ferrari,Andrea Quadri +1 more
TL;DR: In this paper, a weak power-counting theorem was proved that although the number of divergent amplitudes is infinite, only a finite number of amplitudes have to be renormalized, and the counteterms are given in terms of linear combinations of these invariants.
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Algebraic properties of BRST coupled doublets
TL;DR: In this paper, the dependence on doublets of the cohomology of an arbitrary nilpotent differential s (including BRST differentials and classical linearized Slavnov-Taylor (ST) operators) in terms of the doublets-independent component of s is characterized.
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Algebraic Properties of BRST Coupled Doublets
TL;DR: In this article, the dependence on doublets of the cohomology of an arbitrary nilpotent differential s (including BRST differentials and classical linearized Slavnov-Taylor (ST) operators) was characterized in terms of the doublets-independent component of s. All cohomologies are computed in the space of local integrated formal power series.
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Renormalization of the Yang-Mills theory in the ambiguity-free gauge
TL;DR: In this article, the renormalization procedure for the Yang-Mills theory in the gauge free of the Gribov ambiguity is constructed and it is shown that all the ultraviolet infinities may be removed by renormalisation of the parameters entering the classical Lagrangian and the local redefinition of the fields.