Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-03-20
Phys.Lett. B403 (1997) 31-37
Physics
High Energy Physics
High Energy Physics - Theory
10 pages plain LateX2e, 4 eps figures included using epsf. Revised version with extra references
Scientific paper
10.1016/S0370-2693(97)00485-1
We consider new objects in bosonic open string theory -- ND tadpoles, which have N(euman) boundary conditions at one end of the world-sheet and D(irichlet) at the other, must exist due to s-t duality in a string theory with both NN strings and D-branes. We demonstrate how to interpolate between N and D boundary conditions. In the case of mixed boundary conditions the action for a quantum particle is induced on the boundary. Quantum-mechanical particle-wave duality, a dual description of a quantum particle in either the coordinate or the momentum representation, is induced by world-sheet T-duality. The famous relation between compactification radii is equivalent to the quantization of the phase space area of a Planck cell. We also introduce a boundary operator - a ``Zipper'' which changes the boundary condition from N into D and vice versa.
Kogan Ian I.
Wheater John F.
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