Math @ Duke

Publications [#244138] of Stephanos Venakides
Papers Published
 Komineas, S; Shipman, SP; Venakides, S, Continuous and discontinuous dark solitons in polariton condensates,
Physical Review B, vol. 91 no. 13
(April, 2015), American Physical Society (APS), ISSN 10980121 [doi]
(last updated on 2019/04/24)
Abstract: © 2015 American Physical Society. BoseEinstein condensates of excitonpolaritons are described by a Schrödinger system of two equations. Nonlinearity due to exciton interactions gives rise to a frequency band of dark soliton solutions, which are found analytically for the lossless zerovelocity case. The soliton's farfield value varies from zero to infinity as the operating frequency varies across the band. For positive detuning (photon frequency higher than exciton frequency), the exciton wave function becomes discontinuous when the operating frequency exceeds the exciton frequency. This phenomenon lies outside the parameter regime of validity of the GrossPitaevskii (GP) model. Within its regime of validity, we give a derivation of a singlemode GP model from the initial Schrödinger system and compare the continuous polariton solitons and GP solitons using the healing length notion.


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