PTQMC stochastically reproduces exact MBPT coefficients up to 16th order on the Richardson pairing model and defines e^S as a complexity measure that better indicates when perturbative expansions remain valid.
Heinz, Analysis of Three-Body Effects in the In- Medium Similarity Renormalization Group, Master’s the- sis, Technische Univ
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Stochastic many-body perturbation theory for high-order calculations
PTQMC stochastically reproduces exact MBPT coefficients up to 16th order on the Richardson pairing model and defines e^S as a complexity measure that better indicates when perturbative expansions remain valid.