Dirichlet branes and a cohomological definition of time flow

Details Dirichlet branes and a cohomological definition of time flow Dirichlet branes and a cohomological definition of time flow

2007-12-12

arxiv.org/abs/0712.1961v1

JP J.Geom.Topol.8:23-39,2008

Physics

Mathematical Physics

12 pages

Scientific paper

Dirichlet branes are objects whose transverse coordinates in space are matrix-valued functions. This leads to considering a matrix algebra or, more generally, a Lie algebra, as the classical phase space of a certain dynamics where the multiplication of coordinates, being given by matrix multiplication, is nonabelian. Further quantising this dynamics by means of a star-product introduces noncommutativity (besides nonabelianity) as a quantum h-deformation. The algebra of functions on a standard Poisson manifold is replaced with the universal enveloping algebra of the given Lie algebra. We define generalised Poisson brackets on this universal enveloping algebra, examine their properties, and conclude that they provide a natural framework for dynamical setups (such as coincident Dirichlet branes) where coordinates are matrix-valued, rather than number-valued, functions.

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