Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-09-30
Int.J.Mod.Phys.A13:1059-1090,1998
Physics
High Energy Physics
High Energy Physics - Theory
34 pages, LaTeX, 2 figures (included)
Scientific paper
10.1142/S0217751X98000470
We discuss the scattering of a light closed-string state off a $D$ brane, taking into account quantum recoil effects on the latter, which are described by a pair of logarithmic operators. The light-particle and $D$-brane subsystems may each be described by a world-sheet with an external source due to the interaction between them. This perturbs each subsystem away from criticality, which is compensated by dressing with a Liouville field whose zero mode we interpret as time. The resulting evolution equations for the $D$ brane and the closed string are of Fokker-Planck and modified quantum Liouville type, respectively. The apparent entropy of each subsystem increases as a result of the interaction between them, which we interpret as the loss of information resulting from non-observation of the other entangled subsystem. We speculate on the possible implications of these results for the propagation of closed strings through a dilute gas of virtual $D$ branes.
Mavromatos Ellis. J. N.
Nanopoulos Dimitri
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