Johann Ostmeyer

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20242026

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physics.comp-ph2026

Stable and Efficient Algorithms for the Fermion Determinant

Johann Ostmeyer

Some algorithms for the numerically exact treatment of fermion determinants are summarised. This is not supposed to be a review, rather a concise handbook. The audience is expected…

physics.comp-ph2026

Stable Determinant Monte Carlo Simulations at Large Inverse Temperature $I^^{2}$

Thomas Luu, Johann Ostmeyer, Petar Sinilkov +1

At low temperatures $T$ where $1/ T = I^^{2} ≫ 1$ the naÃ¯ve implementation of determinant quantum Monte Carlo (DQMC) methods suffers from loss of precision and numerical instabilities wh…

physics.comp-ph2025

Exponential speed up in Monte Carlo sampling through Radial Updates

Johann Ostmeyer

Recently, it has been shown that the hybrid Monte Carlo (HMC) algorithm is guaranteed to converge exponentially to a given target probability distribution $p (x) \propto e^{- V (x)}$ o…

Stable and Efficient Algorithms for the Fermion Determinant

Stable Determinant Monte Carlo Simulations at Large Inverse Temperature I^2

Exponential speed up in Monte Carlo sampling through Radial Updates

Stable Determinant Monte Carlo Simulations at Large Inverse Temperature $I^^{2}$