Abstract
Many theories of quantum gravity live in higher dimensions, and their reduction to four dimensions via mechanisms such as Kaluza–Klein compactification or brane world models have associated problems. We propose a novel mechanism of dimensional reduction via spontaneous symmetry breaking of a higher dimensional local Lorentz group to one in lower dimensions. Working in the gauge theory formulation of gravity, we couple a Higgs field to spin connections, include a potential for the field, and show that for a suitable choice of Higgs vacuum, the local Lorentz symmetry of the action gets spontaneously reduced to one in a lower dimension. Thus effectively the dimension of spacetime gets reduced by one. This provides a viable mechanism for the dimensional reduction, and may have applications in theories of quantum gravity.
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Acknowledgements
We thank P. Diaz, G. Kunstatter, R. B. Mann, J. Moffat, D. Smith, E. C. Vagenas and M. Walton for discussions. We thank the Referees for their useful comments. This work is supported by the Natural Sciences and Engineering Research Council of Canada.
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Das, S., Faizal, M. Dimensional reduction via a novel Higgs mechanism. Gen Relativ Gravit 50, 87 (2018). https://doi.org/10.1007/s10714-018-2409-x
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DOI: https://doi.org/10.1007/s10714-018-2409-x