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- W4299504579 abstract "We present a new, high-performance coupled electrodynamics-micromagnetics solver for full physical modeling of signals in microelectronic circuitry. The overall strategy couples a finite-difference time-domain (FDTD) approach for Maxwell's equations to a magnetization model described by the Landau-Lifshitz-Gilbert (LLG) equation. The algorithm is implemented in the Exascale Computing Project software framework, AMReX, which provides effective scalability on manycore and GPU-based supercomputing architectures. Furthermore, the code leverages ongoing developments of the Exascale Application Code, WarpX, primarily developed for plasma wakefield accelerator modeling. Our novel temporal coupling scheme provides second-order accuracy in space and time by combining the integration steps for the magnetic field and magnetization into an iterative sub-step that includes a trapezoidal discretization for the magnetization. The performance of the algorithm is demonstrated by the excellent scaling results on NERSC multicore and GPU systems, with a significant (59x) speedup on the GPU using a node-by-node comparison. We demonstrate the utility of our code by performing simulations of an electromagnetic waveguide and a magnetically tunable filter." @default.
- W4299504579 created "2022-10-02" @default.
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- W4299504579 date "2021-03-23" @default.
- W4299504579 modified "2023-09-27" @default.
- W4299504579 title "A Massively Parallel Time-Domain Coupled Electrodynamics-Micromagnetics Solver" @default.
- W4299504579 doi "https://doi.org/10.48550/arxiv.2103.12819" @default.
- W4299504579 hasPublicationYear "2021" @default.
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