تقرير
Quantum backreaction on a classical universe
| العنوان: | Quantum backreaction on a classical universe |
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| المؤلفون: | Husain, Viqar, Singh, Suprit |
| المصدر: | Phys. Rev. D 104, 124048 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, High Energy Physics - Theory |
| الوصف: | We study a first-order formulation for the coupled evolution of a quantum scalar field and a classical Friedmann universe. The model is defined by a state dependent hamiltonian constraint and the time dependent Schr\"odinger equation for the scalar field. We solve the resulting non-linear equations numerically for initial data consisting of a Gaussian scalar field state and gravity phase space variables. This gives a self-consistent semiclassical evolution that includes non-perturbative ``backreaction" due to particle production. We compare the results with the evolution of a quantum scalar field on a fixed background, and find that the backreaction modifies both particle production and cosmological expansion, and that these effects remain bounded. Comment: 7 pages, 2 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.104.124048 |
| URL الوصول: | http://arxiv.org/abs/2109.12752 |
| رقم الأكسشن: | edsarx.2109.12752 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.104.124048 |
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