We demonstrate theoretically and experimentally the spontaneous clustering of solitons in partially coherent wavefronts during the final stages of pattern formation initiated by modulation instability and noise.
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http://dx.doi.org/10.1073/pnas.072287299 | DOI Listing |
Chaos
November 2024
School of Arts and Sciences, Guangzhou Maritime University, Guangzhou 510725, China.
We demonstrate the existence of two types of dark gap solitary waves-the dark gap solitons and the dark gap soliton clusters-in Bose-Einstein condensates trapped in a bichromatic optical superlattice with cubic-quintic nonlinearities. The background of these dark soliton families is different from the one in a common monochromatic linear lattice; namely, the background in our model is composed of two types of Gaussian-like pulses, whereas in the monochromatic linear lattice, it is composed of only one type of Gaussian-like pulses. Such a special background of dark soliton families is convenient for the manipulation of solitons by the parameters of bichromatic and chemical potentials.
View Article and Find Full Text PDFElliptic Hermite-Gaussian (HG) soliton clusters in nonlocal media with anisotropic diffractions are studied comprehensively. The relations among solitons parameters, diffraction indices, and the degree of nonlocality are derived analytically with the Lagrangian method. Stable elliptic HG soliton clusters can be obtained when linear diffraction is anisotropic.
View Article and Find Full Text PDFNanomaterials (Basel)
September 2024
International Institute for Sustainability with Knotted Chiral Meta Matter, Kagamiyama, Higashihiroshima 739-8511, Hiroshima, Japan.
Proc Natl Acad Sci U S A
August 2024
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853.
We study the coupled charge density wave (CDW) and insulator-to-metal transitions in the 2D quantum material 1T-TaS. By applying in situ cryogenic 4D scanning transmission electron microscopy with in situ electrical resistance measurements, we directly visualize the CDW transition and establish that the transition is mediated by basal dislocations (stacking solitons). We find that dislocations can both nucleate and pin the transition and locally alter the transition temperature by nearly ~75 K.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
July 2024
Institute for Theoretical Physics IV, University of Stuttgart, 70569 Stuttgart, Germany.
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