Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-01-06
Prog.Theor.Phys.117:347-357,2007
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, v2,v3,v4: changes and references added, v5: final version in PTP
Scientific paper
10.1143/PTP.117.347
We consider string theory on the Lorentzian Melvin geometry, which is obtained by analytically continuing the two-parameter Euclidean Melvin background. Because this model provides a solvable conformal field theory that describes time-dependent twisted string dynamics, we study the string one-loop partition function and the D-brane spectrum. We found that both the wrapping D2-brane and the codimension-one D-string emit winding strings, and this behavior can be traced to the modified open string Hamiltonian on these probe D-branes.
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