2016/06/07 by Florian Pinsker, Pinsker, Florian, Xinran Ruan +3
Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Nonlinear Photonic Systems #Quantum Gases (cond-mat.quant-gas) #Strong Light-Matter Interactions
paper · pdf · doi:10.48550/arxiv.1606.02130
openalex publication_date 2016/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the study of non-equilibrium polariton condensates it is usually assumed\nthat the dispersion relation of polaritons is parabolic in nature. We show that\nconsidering the true non-parabolic kinetic energy of polaritons leads to\nsignificant changes in the behaviour of the condensate due to the curvature of\nthe dispersion relation and the possibility of transfer of energy to high\nwavenumber components in the condensate spatial profile. We present explicit\nsolutions for plane waves and linear excitations, and identify the differences\nin the theoretical predictions between the parabolic and non-parabolic\nmean-field models, showing the possibility of symmetry breaking in the latter.\nWe then consider the evolution of wavepackets and show that self-localisation\neffects may be observed due to the curvature of the dispersion relation.\nFinally, we revisit the dynamics of dark soliton trains and show that\nadditional localized density excitations may emerge in the dynamics due to the\nexcitation of high frequency components, mimicking the appearance of\nnear-bright solitary waves over short timescales.\n