Quantum treatment of the Bose-Einstein condensation in nonequilibrium systems

TY - JOUR

T1 - Quantum treatment of the Bose-Einstein condensation in nonequilibrium systems

AU - Flayac, H.

AU - Savenko, I. G.

AU - Möttönen, M.

AU - Ala-Nissila, T.

N1 - Publisher Copyright: © 2015 American Physical Society.

PY - 2015/9/8

Y1 - 2015/9/8

N2 - We develop a fully quantum-mechanical approach, based on stochastic trajectories, for an incoherently pumped system of interacting bosons in contact with a thermal reservoir. It enables a complete characterization of coherence in such a multimode system. We apply our model to microcavity exciton polaritons interacting with acoustic phonons and observe the formation of a macroscopic occupation in the lowest-energy mode accompanied by the simultaneous establishment of temporal and spatial coherence. We describe the transition from thermal to coherent statistics together with the expected emergence of an off-diagonal long-range order.

AB - We develop a fully quantum-mechanical approach, based on stochastic trajectories, for an incoherently pumped system of interacting bosons in contact with a thermal reservoir. It enables a complete characterization of coherence in such a multimode system. We apply our model to microcavity exciton polaritons interacting with acoustic phonons and observe the formation of a macroscopic occupation in the lowest-energy mode accompanied by the simultaneous establishment of temporal and spatial coherence. We describe the transition from thermal to coherent statistics together with the expected emergence of an off-diagonal long-range order.

UR - http://www.scopus.com/inward/record.url?scp=84942436784&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.92.115117

DO - 10.1103/PhysRevB.92.115117

M3 - 文章

AN - SCOPUS:84942436784

SN - 1098-0121

VL - 92

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 11

M1 - 115117

ER -