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LATTICEEASY: A Program for Lattice Simulations of Scalar Fields in an Expanding Universe

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arxiv hep-ph/0011159 v1 pith:SCLNW7GG submitted 2000-11-13 hep-ph gr-qchep-lathep-th

classification hep-phgr-qchep-lathep-th
keywords programavailableexpandingfieldslatticeeasyscalaruniverseuseful
verification ladder T0 review T1 audit T2 compute T3 formal

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We describe a C++ program that we have written and made available for calculating the evolution of interacting scalar fields in an expanding universe. The program is particularly useful for the study of reheating and thermalization after inflation. The program and its full documentation are available on the Web at http://physics.stanford.edu/gfelder/latticeeasy/ . In this paper we provide a brief overview of what the program does and what it is useful for.

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Forward citations

Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Nonlinear Lattice Framework for Inflation: Bridging stochastic inflation and the $\delta{N}$ formalism

    gr-qc 2026-04 unverdicted novelty 8.0 of 10

    A shear-free locally FLRW lattice framework for single-field inflation captures spatially varying expansion, curvature corrections, and nonlinear δN observables at a fraction of the cost of full numerical relativity.

  2. Harvesting primordial black holes from stochastic trees with $\texttt{FOREST}$

    astro-ph.CO 2025-01 conditional novelty 7.0 of 10

    A stochastic-branching-tree implementation of inflation, FOREST, computes curvature maps and primordial black hole mass functions with cloud-in-cloud effects included.

  3. CosmoLattice 2.0

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    CosmoLattice v2.0 extends lattice cosmology simulations with non-minimal scalars, ALP–gauge couplings, defect networks, low-storage RK integrators, optimized GWs, and O(10) GPU speedups.

  4. PQ-ball and its Real Scalar Analogue in an Expanding Universe

    hep-ph 2025-07 conditional novelty 6.0 of 10

    3+1D lattice simulations show PQ-balls form from a rotating complex scalar and decay faster for stronger symmetry breaking, with lifetimes roughly scaling as v^4.

  5. The art of simulating the early Universe. Part III: Scalar-Gauge-Fluid Dynamics

    astro-ph.CO 2026-07 accept novelty 5.0 of 10

    Detailed continuum-to-lattice schemes are given for perfect/imperfect fluids alone or coupled to scalars/gauges in FLRW, enabling self-consistent CosmoLattice simulations of early-Universe plasma dynamics and GWs.

  6. Lattice study of primordial black hole formation in bumpy axion inflation

    astro-ph.CO 2026-07 unverdicted novelty 5.0 of 10

    Lattice simulations of bumpy axion U(1) inflation in the strong backreaction regime generate curvature perturbations large enough for primordial black holes to comprise all dark matter.

  7. Preheating and oscillon formation in Einstein-scalar-Gauss-Bonnet gravity

    gr-qc 2026-07 unverdicted novelty 5.0 of 10

    Simulations in Einstein-scalar-Gauss-Bonnet gravity show oscillons form with similar properties to standard cases but trigger EFT breakdown for large couplings via high local curvatures.

  8. PSpectCosmo: A Pseudo-Spectral Code for Cosmological Dynamics Spanning Inflation and Reheating

    astro-ph.CO 2024-11 reject novelty 3.0 of 10

    PSpectCosmo applies a pseudo-spectral method to inflationary lattice simulations and claims to resolve the divergent vacuum energy density by tracking a quantum-to-classical ratio R.

  9. Lectures on Reheating after Inflation

    astro-ph.CO 2019-07 unverdicted

    Lecture notes providing a generic introduction to reheating after inflation, covering its theoretical, phenomenological, and observational aspects.

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