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arXiv · 2605.19913

Self-Decelerating Bright Exciton-Polariton Solitons in Bound-State-in-Continuum Microcavities

Xingran Xu·Chunyu Jia
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Abstract

We theoretically investigate the formation and dynamics of bright exciton-polariton solitons within systems engineered to support Bound States in the Continuum. By employing a driven-dissipative Gross-Pitaevskii equation coupled with a rate equation for the excitonic reservoir, we demonstrate that BICs provide a robust platform for stabilizing the condensate against radiative decay. Utilizing a Lagrangian variational approach, we derive analytical expressions describing the trajectory and velocity of these bright solitonic excitations. Notably, we find that the propagation of these BIC-engineered solitons exhibits a distinct self-deceleration, eventually bringing them to a halt at a final position dictated by the initial conditions and intrinsic system parameters. Furthermore, we analyze the dynamical stability of these solitons. Our findings offer valuable insights into the manipulation of polaritonic flows in non-Hermitian systems.

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Xingran Xu, Chunyu Jia. 2026-05-19. Self-Decelerating Bright Exciton-Polariton Solitons in Bound-State-in-Continuum Microcavities. https://arxiv.org/abs/2605.19913

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