Quantum treatment of the Bose-Einstein condensation in non-equilibrium systems

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-8
Series
PHYSICAL REVIEW B, Volume 92, issue 11
Abstract
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.
Description
Keywords
Bose-Einstein condensation, exciton polaritons, non-equilibrium dynamics, quantum jump, quantum transport, spatial coherence, stochastic wave function, temporal coherence
Other note
Citation
Flayac , H , Savenko , I , Möttönen , M & Ala-Nissila , T 2015 , ' Quantum treatment of the Bose-Einstein condensation in non-equilibrium systems ' , Physical Review B , vol. 92 , no. 11 , 115117 , pp. 1-8 . https://doi.org/10.1103/PhysRevB.92.115117