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.
Hu, et al
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abstract
Dense nucleonic matter is of vital importance for understanding compact stars and inferring the transition into deconfined quark phase. We present $\textit{ab initio}$ exact calculations of infinite nucleonic matter with the state-of-the-art full configuration-interaction quantum Monte Carlo (FCIQMC) method, enabling us to rigorously benchmark many-body methods and assess the degree to which the nucleonic matter is correlated. Our method has been numerically validated against exact diagonalization within a small model space. Calculations of nucleonic matter using chiral nuclear forces reveal that symmetric nuclear matter is strikingly strongly correlated, raising questions on previous $\textit{ab initio}$ calculations of nuclear matter with many-body expansion truncations and offering insights into simultaneous descriptions of finite nuclei and infinite nucleonic matter from first principles.
fields
nucl-th 3years
2026 3verdicts
UNVERDICTED 3representative citing papers
FCIQMC is applied to compute ground-state energies and charge radii of ^4He, ^8Be, ^12C and ^16O at sub-percent many-body uncertainty using chiral EFT interactions.
Review highlighting ab initio calculations for heavy nuclei and dark matter-nucleus scattering to reduce nuclear uncertainties.
citing papers explorer
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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.
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Full Configuration Interaction Quantum Monte Carlo for Accurate $\textit{Ab Initio}$ Nuclear Structure Calculations
FCIQMC is applied to compute ground-state energies and charge radii of ^4He, ^8Be, ^12C and ^16O at sub-percent many-body uncertainty using chiral EFT interactions.
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Ab Initio Nuclear Theory for Heavy Nuclei and Its Application to Dark Matter-Nucleus Scattering
Review highlighting ab initio calculations for heavy nuclei and dark matter-nucleus scattering to reduce nuclear uncertainties.