Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates

In the study of non-equilibrium polariton condensates it is usually assumed that the dispersion relation of polaritons is parabolic in nature. We show that considering the true non-parabolic kinetic energy of polaritons leads to significant changes in the behaviour of the condensate due to the curva...

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Autores principales:	F. Pinsker, X. Ruan, T. J. Alexander
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2a06ca250f9940718cecdbbb19a6f13b
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id	oai:doaj.org-article:2a06ca250f9940718cecdbbb19a6f13b
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spelling	oai:doaj.org-article:2a06ca250f9940718cecdbbb19a6f13b2021-12-02T16:06:39ZEffects of the non-parabolic kinetic energy on non-equilibrium polariton condensates10.1038/s41598-017-01113-82045-2322https://doaj.org/article/2a06ca250f9940718cecdbbb19a6f13b2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01113-8https://doaj.org/toc/2045-2322In the study of non-equilibrium polariton condensates it is usually assumed that the dispersion relation of polaritons is parabolic in nature. We show that considering the true non-parabolic kinetic energy of polaritons leads to significant changes in the behaviour of the condensate due to the curvature of the dispersion relation and the possibility of transfer of energy to high wavenumber components in the condensate spatial profile. We present explicit solutions for plane waves and linear excitations, and identify the differences in the theoretical predictions between the parabolic and non-parabolic mean-field models, showing the possibility of symmetry breaking in the latter. We then consider the evolution of wavepackets and show that self-localisation effects may be observed due to the curvature of the dispersion relation. Finally, we revisit the dynamics of dark soliton trains and show that additional localized density excitations may emerge in the dynamics due to the excitation of high frequency components, mimicking the appearance of near-bright solitary waves over short timescales.F. PinskerX. RuanT. J. AlexanderNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. Pinsker X. Ruan T. J. Alexander Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
description	In the study of non-equilibrium polariton condensates it is usually assumed that the dispersion relation of polaritons is parabolic in nature. We show that considering the true non-parabolic kinetic energy of polaritons leads to significant changes in the behaviour of the condensate due to the curvature of the dispersion relation and the possibility of transfer of energy to high wavenumber components in the condensate spatial profile. We present explicit solutions for plane waves and linear excitations, and identify the differences in the theoretical predictions between the parabolic and non-parabolic mean-field models, showing the possibility of symmetry breaking in the latter. We then consider the evolution of wavepackets and show that self-localisation effects may be observed due to the curvature of the dispersion relation. Finally, we revisit the dynamics of dark soliton trains and show that additional localized density excitations may emerge in the dynamics due to the excitation of high frequency components, mimicking the appearance of near-bright solitary waves over short timescales.
format	article
author	F. Pinsker X. Ruan T. J. Alexander
author_facet	F. Pinsker X. Ruan T. J. Alexander
author_sort	F. Pinsker
title	Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
title_short	Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
title_full	Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
title_fullStr	Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
title_full_unstemmed	Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
title_sort	effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/2a06ca250f9940718cecdbbb19a6f13b
work_keys_str_mv	AT fpinsker effectsofthenonparabolickineticenergyonnonequilibriumpolaritoncondensates AT xruan effectsofthenonparabolickineticenergyonnonequilibriumpolaritoncondensates AT tjalexander effectsofthenonparabolickineticenergyonnonequilibriumpolaritoncondensates
_version_	1718384892685844480

Effects of the non-parabolic kinetic energy on non-equilibrium polariton condensates

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