Loop quantum cosmology, space-time structure, and falsifiability

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Loop quantum cosmology attempts to understand the full dynamics of loop quantum gravity by realizing crucial effects in simpler, usually symmetric settings. Several subtleties arise especially when cosmological questions are to be addressed, related to possible mini-superspace artefacts, consistent cosmological perturbation theory, and quantum space-time structure. Recent work on inhomogeneous perturbations has highlighted some of the dangers of an over-reliance on simple models, sometimes not just reduced by symmetry but also in the possible forms of matter or quantum corrections. Only a consistent treatment of inhomogeneity, taking into account the full gauge structure related to general covariance, can show what happens at high densities in quantum gravity. The relevant methods and results (especially effective equations, potential observational signatures, singularity resolution and signature change) are surveyed in here.

Original languageEnglish (US)
Title of host publicationQuantum Gravity and Quantum Cosmology
EditorsGianluca Calcagni, Lefteris Papantonopoulos, George Siopsis, Nikos Tsamis
Pages149-184
Number of pages36
DOIs
StatePublished - Jan 1 2013

Publication series

NameLecture Notes in Physics
Volume863
ISSN (Print)0075-8450

Fingerprint

cosmology
signatures
gravitation
hazards
artifacts
inhomogeneity
perturbation theory
perturbation
symmetry

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Bojowald, M. (2013). Loop quantum cosmology, space-time structure, and falsifiability. In G. Calcagni, L. Papantonopoulos, G. Siopsis, & N. Tsamis (Eds.), Quantum Gravity and Quantum Cosmology (pp. 149-184). (Lecture Notes in Physics; Vol. 863). https://doi.org/10.1007/978-3-642-33036-0_7
Bojowald, Martin. / Loop quantum cosmology, space-time structure, and falsifiability. Quantum Gravity and Quantum Cosmology. editor / Gianluca Calcagni ; Lefteris Papantonopoulos ; George Siopsis ; Nikos Tsamis. 2013. pp. 149-184 (Lecture Notes in Physics).
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Bojowald, M 2013, Loop quantum cosmology, space-time structure, and falsifiability. in G Calcagni, L Papantonopoulos, G Siopsis & N Tsamis (eds), Quantum Gravity and Quantum Cosmology. Lecture Notes in Physics, vol. 863, pp. 149-184. https://doi.org/10.1007/978-3-642-33036-0_7

Loop quantum cosmology, space-time structure, and falsifiability. / Bojowald, Martin.

Quantum Gravity and Quantum Cosmology. ed. / Gianluca Calcagni; Lefteris Papantonopoulos; George Siopsis; Nikos Tsamis. 2013. p. 149-184 (Lecture Notes in Physics; Vol. 863).

Research output: Chapter in Book/Report/Conference proceedingChapter

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Bojowald M. Loop quantum cosmology, space-time structure, and falsifiability. In Calcagni G, Papantonopoulos L, Siopsis G, Tsamis N, editors, Quantum Gravity and Quantum Cosmology. 2013. p. 149-184. (Lecture Notes in Physics). https://doi.org/10.1007/978-3-642-33036-0_7