A sparse sampling scheme derived from compact orthogonal bases dramatically reduces the number of imaginary-time and Matsubara-frequency points needed for accurate finite-temperature Green's function calculations.
The follow- ing properties can be shown using the recursion relation developed in Ref
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Sparse sampling approach to efficient ab initio calculations at finite temperature
A sparse sampling scheme derived from compact orthogonal bases dramatically reduces the number of imaginary-time and Matsubara-frequency points needed for accurate finite-temperature Green's function calculations.