title: Quantum degenerate exciton-polaritons in thermal equilibrium.
abstract: We study the momentum distribution and relaxation dynamics of semiconductor microcavity polaritons by angle-resolved and time-resolved spectroscopy. Above a critical pump level, the thermalization time of polaritons at positive detunings becomes shorter than their lifetime, and the polaritons form a quantum degenerate Bose-Einstein distribution in thermal equilibrium with the lattice.
authors.affiliation: Quantum Entanglement Project, SORST, JST, Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Deng
authors.forename: David
authors.initials: D
authors.lastname: Press
authors.forename: Stephan
authors.initials: S
authors.lastname: Götzinger
authors.forename: Glenn S
authors.initials: GS
authors.lastname: Solomon
authors.forename: Rudolf
authors.initials: R
authors.lastname: Hey
authors.forename: Klaus H
authors.initials: KH
authors.lastname: Ploog
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Yamamoto