Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-03-23
Int.J.Theor.Phys. 44 (2005) 1599-1616
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, Latex
Scientific paper
10.1007/s10773-005-4832-5
The quantum master equation is usually formulated in terms of functionals of the components of mappings from a space-time manifold M into a finite-dimensional vector space. The master equation is the sum of two terms one of which is the anti-bracket (odd Poisson bracket) of functionals and the other is the Laplacian of a functional. Both of these terms seem to depend on the fact that the mappings on which the functionals act are vector-valued. It turns out that neither this Laplacian nor the anti-bracket is well-defined for sections of an arbitrary vector bundle. We show that if the functionals are permitted to have their values in an appropriate graded tensor algebra whose factors are the dual of the space of smooth functions on M, then both the anti-bracket and the Laplace operator can be invariantly defined. Additionally, one obtains a new anti-bracket for ordinary functionals.
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