High Energy Physics - Lattice
[Submitted on 27 Jan 2025
]
Title: Spectral densities from Euclidean-time lattice correlation functions
Title: 欧几里得时间格点关联函数的谱密度
Abstract: In quantum field theories, spectral densities are directly related to relevant physical observables. In Lattice QCD, their non-perturbative extraction from first principles requires the Inverse Laplace transform of Euclidean-time correlation functions, a notorious ill-posed problem. Here we review our recent proposal [1,2] for a new strategy to perform this inversion both in the continuum and on the lattice, also suitable for smeared spectral densities, both in the continuum and in the discrete cases.
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