Nonlinear excitations, stability inversions, and dissipative dynamics in quasi-one-dimensional polariton condensates

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Cuevas, J (Autor) Outra; Rodrigues, AS (Autor) FCUP; Carretero Gonzalez, R (Autor) Outra; Kevrekidis, PG (Autor) Outra; Frantzeskakis, DJ (Autor) Outra

Revista

Título: Physical Review B - Condensed Matter and Materials Physics

Vol. 83

ISSN: 1098-0121

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 10 Citações

ISI Web of Science

Scopus - 12 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Física > Propriedades da matéria condensada > Propriedade electrónica, magnética e supercondutora

Outras Informações

ID Authenticus: P-002-QCK

DOI: 10.1103/physrevb.83.245140

Abstract (EN): We study the existence, stability, and dynamics of the ground state and nonlinear excitations, in the form of dark solitons, for a quasi-one-dimensional polariton condensate in the presence of nonresonant pumping and nonlinear damping. We find a series of remarkable features that can be directly contrasted to the case of the typically energy-conserving ultracold alkali-atom Bose-Einstein condensates. For some sizable parameter ranges, the nodeless ("ground") state becomes unstable toward the formation of stable nonlinear single- or multi-dark-soliton excitations. It is also observed that for suitable parametric choices, the instability of single dark solitons can nucleate multi-dark-soliton states. Also, for other parametric regions, stable asymmetric sawtooth-like solutions exist. These are shown to emerge through a symmetry-breaking bifurcation from bubble-like solutions that we also explore. We also consider the dragging of a defect through the condensate and the interference of two initially separated condensates, both of which are capable of nucleating dark multisoliton dynamical states.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10