174 citations · 649 across the 12 of their papers we have counts for
3 papers · 1 filter
Effective field theory for dilute Fermi systems at fourth order
C. Wellenhofer, C. Drischler, A. Schwenk
We discuss high-order calculations in perturbative effective field theory for fermions at low energy scales. The Fermi-momentum or expansion for the ground-state en…
Constrained extrapolation problem and order-dependent mappings
Corbinian Wellenhofer, Daniel R. Phillips, Achim Schwenk
We consider the problem of extrapolating the perturbation series for the dilute Fermi gas in three dimensions to the unitary limit of infinite scattering length and into the BEC re…
From weak to strong: constrained extrapolation of perturbation series with applications to dilute Fermi systems
C. Wellenhofer, D. R. Phillips, A. Schwenk
We develop a method that uses truncation-order-dependent re-expansions constrained by generic strong-coupling information to extrapolate perturbation series to the nonperturbative…