Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-04-19
Phys.Rev.D74:045024,2006
Physics
High Energy Physics
High Energy Physics - Theory
We improve Sec.4. and Conclusion and we added the Appendix in order to clarify results
Scientific paper
10.1103/PhysRevD.74.045024
It is known that the presence of antisymmetric background field $B_{\mu\nu}$ leads to noncommutativity of Dp-brane manifold. Addition of the linear dilaton field in the form $\Phi(x)=\Phi_0+a_\mu x^\mu$, causes the appearance of the commutative Dp-brane coordinate $x=a_\mu x^\mu$. In the present article we show that for some particular choices of the background fields, $a^2\equiv G^{\mu\nu}a_\mu a_\nu=0$ and $\tilde a^2\equiv [ (G-4BG^{-1}B)^{-1}\ ]^{\mu\nu}a_\mu a_\nu=0$, the local gauge symmetries appear in the theory. They turn some Neuman boundary conditions into the Dirichlet ones, and consequently decrease the number of the Dp-brane dimensions.
Nikolic Biljana
Sazdović Branislav
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