title: Backreaction in acoustic black holes.
abstract: The backreaction equations for the linearized quantum fluctuations in an acoustic black hole are given. The solution near the horizon, obtained within a dimensional reduction, indicates that acoustic black holes, unlike Schwarzschild ones, get cooler as they radiate phonons. They show remarkable analogies with near-extremal Reissner-Nordström black holes.
authors.affiliation: Dipartimento di Fisica dell'Università di Bologna and INFN sezione di Bologna, Via Irnerio 46, 40126 Bologna, Italy. balbinot@bo.infn.it
authors.forename: Roberto
authors.initials: R
authors.lastname: Balbinot
authors.forename: Serena
authors.initials: S
authors.lastname: Fagnocchi
authors.forename: Alessandro
authors.initials: A
authors.lastname: Fabbri
authors.forename: Giovanni P
authors.initials: GP
authors.lastname: Procopio