STOLAS: STOchastic LAttice Simulation of cosmic inflation

Abstract

We develop a C++ package of the STOchastic LAttice Simulation (STOLAS) of cosmic inflation. It performs the numerical lattice simulation in the application of the stochastic-$\delta N$ formalism. STOLAS can directly compute the three-dimensional map of the observable curvature perturbation without estimating its statistical properties. In its application to two toy models of inflation, chaotic inflation and Starobinsky's linear-potential inflation, we confirm that STOLAS is well-consistent with the standard perturbation theory. Furthermore, by introducing the importance sampling technique, we have success in numerically sampling the current abundance of primordial black holes in a non-perturbative way. The package is available at https://github.com/STOchasticLAtticeSimulation/STOLAS_dist.

34 pages, 10 figures; v2 matches the accepted version in JCAP

References in corpus (38)

• Laser Interferometer Space Antenna
• Primordial Non-Gaussianities from Inflation Models
• Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
• Non-Gaussianities in two-field inflation
• Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse
• Observational Evidence for Primordial Black Holes: A Positivist Perspective
• Non-perturbative non-Gaussianity and primordial black holes
• Logarithmic Duality of the Curvature Perturbation
• Primordial Non-Gaussianity in Multi-Scalar Slow-Roll Inflation
• Primordial Black Holes
• Implications of stochastic effects for primordial black hole production in ultra-slow-roll inflation
• Non-perturbative approach for curvature perturbations in stochastic-$\delta N$ formalism
• Lattice Simulations of Axion-U(1) Inflation
• Power spectrum in stochastic inflation
• Primordial black holes from stochastic tunnelling
• Primordial Black Hole Formation in Starobinsky's Linear Potential Model
• Statistics of coarse-grained cosmological fields in stochastic inflation
• Stochastic constant-roll inflation and primordial black holes
• Inflationary Butterfly Effect: Non-perturbative Dynamics From Small-Scale Features
• Review on stochastic approach to inflation
• Catastrogenesis: DM, GWs, and PBHs from ALP string-wall networks
• Stochastic inflation at all order in slow-roll parameters: foundations
• The separate-universe approach and sudden transitions during inflation
• Primordial black hole dark matter from catastrogenesis with unstable pseudo-Goldstone bosons
• Primordial Black Holes from CDM Isocurvature Perturbations
• Clustering of primordial black holes from quantum diffusion during inflation
• Highly asymmetric probability distribution from a finite-width upward step during inflation
• Lattice simulations of Abelian gauge fields coupled to axions during Inflation
• Slow-Roll Inflation at N3LO
• Quantum Diffusion in Sharp Transition to Non-Slow-Roll Phase
• Numerical stochastic inflation constrained by frozen noise
• Uphill inflation
• Primordial black hole compaction function from stochastic fluctuations in ultra-slow-roll inflation
• Primordial black hole formation from massless scalar isocurvature
• Primordial Black Holes from Axion Domain Wall Collapse
• Analysis of the subsolar-mass black hole candidate SSM200308 from the second part of the third observing run of Advanced LIGO-Virgo
• Computing First-Passage Times with the Functional Renormalisation Group
• Inflation with Stochastic Boundary

Cited by in corpus (15)

• Ultra-Slow-Roll Inflation on the Lattice I: Backreaction and Nonlinear Effects
• Non-spherical effects on the mass function of Primordial Black Holes
• Ultra-Slow-Roll Inflation on the Lattice II: Nonperturbative Curvature Perturbation
• Stochastic inflation with gradient interactions
• Quantitative classicality in cosmological interactions during inflation
• Dip and non-linearity in the curvature perturbation from inflation with a transient non-slow-roll stage
• Inflationary relics from an Ultra-Slow-Roll plateau
• Stochastic-tail of the curvature perturbation in hybrid inflation
• Stochastic Inflation in Numerical Relativity
• Stochastic Inflation with Interacting Noises
• Bunch-Davies initial conditions and non-perturbative inflationary dynamics in Numerical Relativity
• Time-reversed Stochastic Inflation
• Effect of stochastic kicks on primordial black hole abundance and mass via the compaction function
• Nonlinear Lattice Framework for Inflation: Bridging stochastic inflation and the $\delta N$ formalism
• Calculating the power spectrum in stochastic inflation by Monte Carlo simulation and least squares curve fitting