Quantum entanglement in multi-field inflation

0519713 - FZÚ 2020 RIV GB eng J - Článek v odborném periodiku
Bolis, Nadia - Fujita, T. - Mizuno, S. - Mukohyama, S.
Quantum entanglement in multi-field inflation.
Journal of Cosmology and Astroparticle Physics. Roč. 2018, č. 9 (2018), s. 1-26, č. článku 004. ISSN 1475-7516. E-ISSN 1475-7516
GRANT EU: European Commission(XE) 617656 - THEMODS
Institucionální podpora: RVO:68378271
Klíčová slova: inflation * cosmological perturbation theory * transplanckian physics
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 5.524, rok: 2018
Způsob publikování: Omezený přístup
https://doi.org/10.1088/1475-7516/2018/09/004

We study the emergence of quantum entanglement in multi-field inflation. In this scenario, the perturbations of one field contribute to the observable curvature perturbation, while multi-field dynamics with the other fields affect the curvature perturbation through particle production and entanglement. We develop a general formalism which defines the quantum entanglement between the perturbations of the multiple fields both in the Heisenberg and Schrödinger pictures, and show that entanglement between different fields can arise dynamically in the context of multi-field inflationary scenarios. We also present a simple model in which a sudden change in the kinetic matrix of the scalar fields generates entanglement and an oscillatory feature appears in the power spectrum of the inflaton perturbation.
Trvalý link: http://hdl.handle.net/11104/0304705