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Can broken rotational invariance be reconciled with inflation?

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Abstract

Motivated by claims of broken rotational invariance in the WMAP data, a number of models have appeared in the literature realizing this effect through vector field(s) with a nonvanishing spatial vacuum expectation value. We discuss why many such models have ghost instabilities.

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Authors and Affiliations

  1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota, USA

    M. Peloso

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  1. M. Peloso
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Correspondence to M. Peloso.

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Dedicated to the memory of Lev Kofman

Prepared from an English manuscript submitted by the author; for the Russian version, see Teoreticheskaya i Matematicheskaya Fizika, Vol. 170, No. 2, pp. 223–229, February, 2012.

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Peloso, M. Can broken rotational invariance be reconciled with inflation?. Theor Math Phys 170, 181–186 (2012). https://doi.org/10.1007/s11232-012-0019-4

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  • DOI: https://doi.org/10.1007/s11232-012-0019-4

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