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A Korteweg-de Vries description of dark solitons in polariton superfluids


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Opened Access A Korteweg-de Vries description of dark solitons in polariton superfluids

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Author: Carretero-González, Ricardo
Cuevas-Maraver, Jesús
Frantzeskakis, Dimitri J.
Horikis, T. P.
Kevrekidis, Panayotis G.
Rodrigues, Augusto S.
Coordinator/Director: Archilla, Juan F. R.
Department: Universidad de Sevilla. Departamento de Física Aplicada I
Date: 2017
Published in: Physics Letters A, 381 (45), 3805-3811.
Document type: Article
Abstract: We study the dynamics of dark solitons in an incoherently pumped exciton-polariton condensate by means of a system composed by a generalized open-dissipative Gross-Pitaevskii equation for the polaritons’ wavefunction and a rate equation for the exciton reservoir density. Considering a perturbative regime of sufficiently small reservoir excitations, we use the reductive perturbation method, to reduce the system to a Korteweg-de Vries (KdV) equation with linear loss. This model is used to describe the analytical form and the dynamics of dark solitons. We show that the polariton field supports decaying dark soliton solutions with a decay rate determined analytically in the weak pumping regime. We also find that the dark soliton evolution is accompanied by a shelf, whose dynamics follows qualitatively the effective KdV picture.
Cite: Carretero-González, R., Cuevas-Maraver, J., Frantzeskakis, D.J., Horikis, T.P., Kevrekidis, P.G. y Rodrigues, A.S. (2017). A Korteweg-de Vries description of dark solitons in polariton superfluids. Physics Letters A, 381 (45), 3805-3811.
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DOI: 10.1016/j.physleta.2017.10.004

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