We introduce a dilated coordinate method to address computational challenges in nuclear lattice effective field theory for weakly bound few-body systems. The approach employs adaptive mesh refinement via analytic coordinate transformations, dynamically adjusting spatial resolution to resolve short-range nuclear interactions with fine grids while efficiently capturing long-range wave function tails with coarse grids. Numerical demonstrations for two- and three-body systems confirm accelerated convergence towards infinite-volume limit compared to uniform lattices, particularly beneficial for accessing highly excited states and shallow bound states near the continuum threshold. This method establishes a foundation for ab initio studies of exotic nuclear systems near the dripline and light hypernuclei, with direct extensions to scattering and reaction processes.

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• Effective field theory
• Few-body systems
• A ≤ 5
• Ab initio calculations
• Lattice field theory
• Many-body techniques