Nonlinear Excitations, Stability Inversions and Dissipative Dynamics in Quasi-one-dimensional Polariton Condensates
arXiv:1102.2209 · doi:10.1103/PhysRevB.83.245140
Abstract
We consider 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 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 sizeable parameter ranges, the nodeless ("ground") state becomes {\it unstable} towards the formation of {\em stable} nonlinear single or {\em 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, {\em stable asymmetric} sawtooth-like solutions exist. Finally, we 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 multi-soliton dynamical states.
9 pages, 10 figures
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Cited by in corpus (7)
- Dynamics and stability of dark solitons in exciton-polariton condensates
- Soliton Instabilities and Vortex Streets Formation in a Polariton Quantum Fluid
- Creation and abrupt decay of a quasi-stationary dark soliton in a polariton condensate
- Unstable and stable regimes of polariton condensation
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- A Korteweg-de Vries description of dark solitons in polariton superfluids
- Symmetry-breaking Effects for Polariton Condensates in Double-Well Potentials