title: Macroscopic thermal entanglement due to radiation pressure.
abstract: Can entanglement and the quantum behavior in physical systems survive at arbitrary high temperatures? In this Letter we show that this is the case for a electromagnetic field mode in an optical cavity with a movable mirror in a thermal state. We also identify two different dynamical regimes of generation of entanglement separated by a critical coupling strength.
authors.affiliation: Faculdade Ciências Universidade do Porto, Rua do Campo Alegre 687 4169-007, Porto, Portugal.
authors.forename: Aires
authors.initials: A
authors.lastname: Ferreira
authors.forename: Ariel
authors.initials: A
authors.lastname: Guerreiro
authors.forename: Vlatko
authors.initials: V
authors.lastname: Vedral