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MULTIMODECODE: an efficient numerical solver for multifield inflation
Copyright policy )We present MultiModeCode, a Fortran 95/2000 package for the numerical exploration of multifield inflation models. This program facilitates efficient Monte Carlo sampling of prior probabilities for inflationary model parameters and initial conditions and is the first publicly available code that can efficiently generate large sample-sets for inflation models with $\mathcal O(100)$ fields. The code numerically solves the equations of motion for the background and first-order perturbations of multi-field inflation models with canonical kinetic terms and arbitrary potentials, providing the adiabatic, isocurvature, and tensor power spectra at the end of inflation. For models with sum-separable potentials MultiModeCode also computes the slow-roll prediction via the $\delta N$ formalism for easy model exploration and validation. We pay particular attention to the isocurvature perturbations as the system approaches the adiabatic limit, showing how to avoid numerical instabilities that affect some other approaches to this problem. We demonstrate the use of MultiModeCode by exploring a few toy models. Finally, we give a concise review of multifield perturbation theory and a user's manual for the program.
Comment: 20 pages excluding Appendices, 3 figures. Code publicly available at www.modecode.org
Microsoft Academic Graph classification: Eternal inflation Applied mathematics Fortran computer.programming_language computer Toy model Monte Carlo method Solver Equations of motion Adiabatic process Physics Cosmological perturbation theory
Astronomy and Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Instrumentation and Methods for Astrophysics (astro-ph.IM), High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), FOS: Physical sciences
Astronomy and Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Instrumentation and Methods for Astrophysics (astro-ph.IM), High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), FOS: Physical sciences
Microsoft Academic Graph classification: Eternal inflation Applied mathematics Fortran computer.programming_language computer Toy model Monte Carlo method Solver Equations of motion Adiabatic process Physics Cosmological perturbation theory
- University of London United Kingdom
- University of Auckland New Zealand
- University of the Basque Country Spain
- Ikerbasque Spain
- Universidad del País Vasco (UPV/EHU) Spain
96110
[1] WMAP Collaboration, G. Hinshaw et al., Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results, Astrophys.J.Suppl. 208 (2013) 19, [arXiv:1212.5226].
[2] Planck Collaboration, P. Ade et al., Planck 2013 results. I. Overview of products and scienti c results, arXiv:1303.5062.
[3] Planck Collaboration, P. Ade et al., Planck 2013 results. XVI. Cosmological parameters, arXiv:1303.5076.
[4] Planck Collaboration, P. Ade et al., Planck 2013 results. XXII. Constraints on in ation, arXiv:1303.5082.
[5] D. Baumann and L. McAllister, In ation and String Theory, arXiv:1404.2601.
[6] R. Easther and K.-i. Maeda, Chaotic dynamics and two eld in ation, Class.Quant.Grav. 16 (1999) 1637{1652, [gr-qc/9711035].
[7] S. Clesse, C. Ringeval, and J. Rocher, Fractal initial conditions and natural parameter values in hybrid in ation, Phys.Rev. D80 (2009) 123534, [arXiv:0909.0402]. [OpenAIRE]
[8] R. Easther and L. C. Price, Initial conditions and sampling for multi eld in ation, JCAP 1307 (2013) 027, [arXiv:1304.4244].
[9] R. Easther, L. C. Price, and J. Rasero, In ating an Inhomogeneous Universe, arXiv:1406.2869.
[10] J. A. Adams, B. Cresswell, and R. Easther, In ationary perturbations from a potential with a step, Phys.Rev. D64 (2001) 123514, [astro-ph/0102236].
- University of London United Kingdom
- University of Auckland New Zealand
- University of the Basque Country Spain
- Ikerbasque Spain
- Universidad del País Vasco (UPV/EHU) Spain
- University of Wisconsin–Oshkosh United States
- University College London United Kingdom
- Aspen Center For Physics United States
- UNIVERSIDAD DEL PAIS VASCO/ EUSKAL HERRIKO UNIBERTSITATEA Spain
We present MultiModeCode, a Fortran 95/2000 package for the numerical exploration of multifield inflation models. This program facilitates efficient Monte Carlo sampling of prior probabilities for inflationary model parameters and initial conditions and is the first publicly available code that can efficiently generate large sample-sets for inflation models with $\mathcal O(100)$ fields. The code numerically solves the equations of motion for the background and first-order perturbations of multi-field inflation models with canonical kinetic terms and arbitrary potentials, providing the adiabatic, isocurvature, and tensor power spectra at the end of inflation. For models with sum-separable potentials MultiModeCode also computes the slow-roll prediction via the $\delta N$ formalism for easy model exploration and validation. We pay particular attention to the isocurvature perturbations as the system approaches the adiabatic limit, showing how to avoid numerical instabilities that affect some other approaches to this problem. We demonstrate the use of MultiModeCode by exploring a few toy models. Finally, we give a concise review of multifield perturbation theory and a user's manual for the program.
Comment: 20 pages excluding Appendices, 3 figures. Code publicly available at www.modecode.org