The slowly rotating near extremal D1-D5 system as a 'hot tube'

The geometry of the D1-D5 system with a small angular momentum j has a long throat ending in a conical defect. We solve the scalar wave equation for l ow energy quanta in this geometry. The quantum is found to reflect off the end of the throat, and stay trapped in the throat for a long time. The leng th of the throat for j = 1/2 equals n(1)n(5)R, the length of the effective string in the CFT; we also find that at this distance the incident wave bec omes nonlinear. Filling the throat with several quanta gives a 'hot tube' w hich has emission properties similar to those of the near extremal black ho le. (C) 2001 Published by Elsevier Science B.V.