Art of lattice and gravity waves from preheating
Abstract
The nonlinear dynamics of preheating after early-Universe inflation is often studied with lattice simulations. In this work I present a new lattice code HLattice. It differs from previous publicly available codes in the following three aspects: (i) A much higher accuracy is achieved with a modified sixth-order symplectic integrator; (ii) scalar, vector, and tensor metric perturbations in synchronous gauge and their feedback to the dynamics of scalar fields are all included; (iii) the code uses a projector that completely removes the scalar and vector components defined by the discrete spatial derivatives. Such a generic code can have a wide range of applications. As an example, gravity waves from preheating after inflation are calculated with a better accuracy.
- Publication:
-
Physical Review D
- Pub Date:
- June 2011
- DOI:
- 10.1103/PhysRevD.83.123509
- arXiv:
- arXiv:1102.0227
- Bibcode:
- 2011PhRvD..83l3509H
- Keywords:
-
- 98.80.Cq;
- 04.30.Db;
- 98.70.Vc;
- Particle-theory and field-theory models of the early Universe;
- Wave generation and sources;
- Background radiations;
- Astrophysics - Cosmology and Extragalactic Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory;
- 97M50;
- J.2
- E-Print:
- 17 pages, 13 figures, HLattice release, HLattice Version 2.0