FewBodyToolkit.jl: a Julia package for solving quantum few-body problems
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Few-body physics explores quantum systems of a small number of particles, bridging the gap between single-particle and many-body regimes. To provide an accessible tool for such studies, we present FewBodyToolkit.jl, a Julia package for quantum few-body simulations. The package supports general two- and three-body systems in various spatial dimensions with arbitrary pair-interactions, and allows to calculate bound and resonant states. The implementation is based on the well-established Gaussian expansion method and we illustrate the package's capabilities through benchmarks and research examples. The package comes with documentation and examples, making it useful for research, teaching, benchmarking, and method development.
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Stabilization of three-body resonances to bound states in a continuum
A two-channel model demonstrates stabilization of three-body resonances into bound states in the continuum via parameter tuning, shown in 1D mass-imbalanced and 3D Efimov systems with magnetic field control.
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