title: Black hole Berry phase.
abstract: Supersymmetric black holes are characterized by a large number of degenerate ground states. We argue that these black holes, like other quantum mechanical systems with such a degeneracy, are subject to a phenomenon which is called the geometric or Berry's phase: under adiabatic variations of the background values of the supergravity moduli, the quantum microstates of the black hole mix among themselves. We present a simple example where this mixing is exactly computable, that of small supersymmetric black holes in 5 dimensions.
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, 1018 XE Amsterdam, The Netherlands. J.deBoer@uva.nl
authors.forename: Jan
authors.initials: J
authors.lastname: de Boer
authors.forename: Kyriakos
authors.initials: K
authors.lastname: Papadodimas
authors.forename: Erik
authors.initials: E
authors.lastname: Verlinde