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- W4316019747 abstract "Fractional differential equations have become a fundamental modelling approach for understanding and simulating the many aspects of non-locality and spatial heterogeneity of complex materials and systems. Yet, while real-order fractional operators are nowadays widely adopted, little progress has been made in extending such operators to complex-order counterparts. In this work, we introduce new definitions for the complex-order fractional Laplacian, fully consistent with the theory of averaging of smooth functions over fractal sets, and present tailored spectral methods for their numerical treatment. The proposed complex-order operators exhibit a dual particle-wave behaviour, with solutions manifesting wave-like features depending on the magnitude of the imaginary part of the fractional order. Reaction–diffusion systems driven by the complex-order fractional Laplacian exhibit unique spatio-temporal dynamics, such as equilibrium of diffusion in random materials by interference of scattered waves, conduction block and highly fractionated propagation, or the generation of completely novel Turing patterns. Taken together, our results support that the proposed complex-order operators hold unparalleled capabilities to advance the description of multiscale transport phenomena in physical and biological processes highly influenced by the heterogeneity of complex media." @default.
- W4316019747 created "2023-01-14" @default.
- W4316019747 creator A5003330950 @default.
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- W4316019747 date "2023-05-01" @default.
- W4316019747 modified "2023-10-07" @default.
- W4316019747 title "Complex-order fractional diffusion in reaction-diffusion systems" @default.
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- W4316019747 doi "https://doi.org/10.1016/j.cnsns.2023.107120" @default.
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