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Two-dimensional optical gap solitons and vortices in a coherent atomic ensemble loaded on optical lattices

Chen, Zhiming ; Zeng, Jianhua

Communications in nonlinear science & numerical simulation, 2021-11, Vol.102, p.105911, Article 105911 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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  • Título:
    Two-dimensional optical gap solitons and vortices in a coherent atomic ensemble loaded on optical lattices
  • Autor: Chen, Zhiming ; Zeng, Jianhua
  • Assuntos: Bloch waves ; Coherence ; Data processing ; Electromagnetically induced transparency ; Electromagnetics ; Forbidden bands ; Kerr nonlinearity ; Lattice theory ; Optical communication ; Optical gap solitons and vortices ; Optical lattices ; Optical properties ; Quantum phenomena ; Schrodinger equation ; Solitary waves ; Stability analysis ; Vortices ; Wave spectra
  • É parte de: Communications in nonlinear science & numerical simulation, 2021-11, Vol.102, p.105911, Article 105911
  • Descrição: •Optical lattices and electromagnetically induced transparency are two useful techniques for revealing the nonlinear and quantum physics in ultracold atomic systems. We combine both to survey the existence of stable two-dimensional localized gap solitons and vortices in such systems.•The property and (in)stability of 2D localized gap modes of solitons and vortices types are obtained by linear-stability analysis and direct perturbed simulations of the perturbed dynamical equation.•The predicted localized gap modes deepen our understanding of soliton physics in periodic system, offering applications for optical communications and quantum information processing. Coherent atomic systems, e.g., resonantly cold atomic gases within which electromagnetically induced transparency (EIT) operates, have recently received great attention, because of their remarkable scientific properties and pivotal implications. Light behavior in such systems governed by various potentials is a new and interesting research focus, but missing literally report on two-dimensional (2D) localized gap modes in coherent atomic systems loaded on optical lattices. We survey such issue in a coherent atomic gas inside where the EIT turns on, trapped by 2D optical lattices—constituted by counter-propagating far-detuned Stark laser fields, in the framework of nonlinear Schrödinger equation derived from Maxwell-Bloch equations. Using the linear stability analysis and direct perturbed evolution we address the formation, property, and stability of 2D localized gap modes of two types, gap solitons and gap vortices, in forbidden band gaps of the underlying linear Bloch-wave spectrum. The former mode is fundamental gap solitons, and the latter belongs to higher-order gap solitons with embedded topological charge. Our results are helpful not only for in-depth understanding of soliton dynamics in coherent atomic ensemble loaded on periodic potentials, but also for laying the groundwork for forthcoming applications in optical communications and quantum information processing.
  • Editor: Amsterdam: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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