Normal ordering and noncommutativity in open bosonic strings

Details Normal ordering and noncommutativity in open bosonic strings Normal ordering and noncommutativity in open bosonic strings

2006-08-10

arxiv.org/abs/hep-th/0608065v2

Phys.Rev.D74:105011,2006

Physics

High Energy Physics

High Energy Physics - Theory

10 pages latex, references added

Scientific paper

10.1103/PhysRevD.74.105011

Noncommutativity in an open bosonic string moving in the presence of a background Neveu-Schwarz two-form field $B_{\mu \nu}$ is investigated in a conformal field theory approach, leading to noncommutativity at the boundaries. In contrast to several discussions, in which boundary conditions are taken as Dirac constraints, we first obtain the mode algebra by using the newly proposed normal ordering, which satisfies both equations of motion and boundary conditions. Using these the commutator among the string coordinates is obtained. Interestingly, this new normal ordering yields the same algebra between the modes as the one satisfying only the equations of motion. In this approach, we find that noncommutativity originates more transparently and our results match with the existing results in the literature.

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