Loop quantum cosmology and the fine structure constant

Sloan, David (2013) Loop quantum cosmology and the fine structure constant. Classical and Quantum Gravity, 31 (2). ISSN 0264-9381

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The cosmological implications of introducing a variation to the fine structure ‘constant’, α are examined within the context of loop quantum cosmology. The evolution of α is described using the model introduced by Bekenstein, Sandvik, Barrow and Magueijo, in which a ghost scalar field produces the variation. The dynamics of the system are examined in flat and closed cosmological settings. Matter consisting of the scalar field and radiation are examined with a thermodynamically motivated coupling between the two, which can lead to a series of bounces induced by both the negative density effects of the ghost field and the loop effects.

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Journal Article
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Classical and Quantum Gravity
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11 Feb 2019 10:15
Last Modified:
22 Nov 2022 07:02