Cosmic voids and filaments from quantum gravity

Using computer simulations, we study the geometry of a typical quantum universe, i.e., the geometry one might expect before a possible period of inflation. We display it using coordinates defined by means of four classical scalar fields satisfying the Laplace equation with nontrivial boundary condit...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 81; no. 8; pp. 1 - 5
Main Authors Ambjørn, J., Drogosz, Z., Gizbert-Studnicki, J., Görlich, A., Jurkiewicz, J., Németh, D.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2021
Springer
Springer Nature B.V
SpringerOpen
Subjects
Astronomy
Astrophysics and Cosmology
Boundary conditions
Elementary Particles
Filaments
Fractals
Geometry
Gravity
Hadrons
Heavy Ions
Inflation (Finance)
Laplace equation
Letter
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum gravity
Scalars
Spacetime
String Theory
Theoretical physics
Universe
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Summary:Using computer simulations, we study the geometry of a typical quantum universe, i.e., the geometry one might expect before a possible period of inflation. We display it using coordinates defined by means of four classical scalar fields satisfying the Laplace equation with nontrivial boundary conditions. They are a close analogue of the harmonic coordinate condition used in the context of GR (Kuchar and Torre in Phys Rev D 43:419–441, 1991). It is highly nontrivial that these ideas can be applied to understand the structures which appear in very irregular and fluctuating geometries. The field configurations reveal cosmic web structures surprisingly similar to the ones observed in the present-day universe.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-021-09468-z