Abstract:
We consider the appearance of multiple scalar fields in string field theory-based nonlocal models with a single scalar field at large times. In this regime, all the scalar fields are free. This system minimally coupled to gravity can be analyzed approximately or numerically. We construct an exactly solvable model that has an exact solution in the cosmological scenario with the Friedmann metric and restores the asymptotic behavior expected from string field theory. We consider different applications of such a potential to multifield cosmological models.
Keywords:
string field theory, cosmological perturbation, phantom.
Citation:
F. Galli, A. S. Koshelev, “Multifield cosmology from string field theory: An exactly solvable approximation”, TMF, 164:3 (2010), 401–409; Theoret. and Math. Phys., 164:3 (2010), 1169–1175
This publication is cited in the following 7 articles:
Giacomini A., Leach P.G.L., Leon G., Paliathanasis A., “Anisotropic Spacetimes in Chiral Scalar Field Cosmology”, Eur. Phys. J. Plus, 136:10 (2021), 1018
Koshelev A.S. Vernov S.Yu., “Cosmological perturbations in SFT inspired non-local scalar field models”, Eur. Phys. J. C, 72:10 (2012), 2198
S. Yu. Vernov, “Exact solutions of nonlocal nonlinear field equations in cosmology”, Theoret. and Math. Phys., 166:3 (2011), 392–402
Koshelev A.S., Vernov S.Yu., “Analysis of scalar perturbations in cosmological models with a non-local scalar field”, Classical Quantum Gravity, 28:8 (2011), 085019
Aref'eva I.Ya., Volovich I.V., “Cosmological daemon”, Journal of High Energy Physics, 2011, no. 8, 102
Galli F., Koshelev A.S., “Perturbative stability of SFT-based cosmological models”, J. Cosmol. Astropart. Phys., 2011, no. 5, 012
Koshelev A.S., “SFT based cosmological models”, 16th International Symposium on Particles, Strings and Cosmology (PASCOS 2010), J. Phys.: Conf. Ser., 259, 2010, 012044