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- Centre National de la Recherche ScientifiqueFR448 papers
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11 papers · 1 filter
BPST instanton and Spin from inequivalent quantizations
David McMullan, Izumi Tsutsui
We present a simple alternative to Mackey's account of the (infinite) inequivalent quantizations possible on a coset space G/H. Our reformulation is based on the reduction ${\rm G…
Environmentally Friendly Renormalization
Denjoe O'Connor, C. R. Stephens
We analyze the renormalization of systems whose effective degrees of freedom are described in terms of fluctuations which are ``environment'' dependent. Relevant environmental para…
Effective Critical Exponents for Dimensional Ccrossover and Quantum Systems from an Environmentally Friendly Renormalization Group
Denjoe O'Connor, C. R. Stephens
Series for the Wilson functions of an ``environmentally friendly'' renormalization group are computed to two loops, for an vector model, in terms of the ``floating coupling'…
BRST Quantisation and the Product Formula for the Ray-Singer Torsion
Charles Nash, Denjoe O' Connor
We give a quantum field theoretic derivation of the formula obeyed by the Ray-Singer torsion on product manifolds. Such a derivation has proved elusive up to now. We use a BRST for…
The vacuum preserving Lie algebra of a classical W-algebra
L. Feher, L. O'Raifeartaigh, I. Tsutsui
We simplify and generalize an argument due to Bowcock and Watts showing that one can associate a finite Lie algebra (the `classical vacuum preserving algebra') containing the Möbiu…
A New Symmetry for QED
Martin Lavelle, David McMullan
We demonstrate that QED exhibits a previously unobserved symmetry. Some consequences are discussed.