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DBI Lifshitz Inflation

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arxiv 1103.2919 v3 pith:NXDWUDXA submitted 2011-03-15 hep-th astro-ph.COhep-ph

DBI Lifshitz Inflation

classification hep-th astro-ph.COhep-ph
keywords fieldinflationgenerallifshitzmatteractionanisotropicarbitrary
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A new model of DBI inflation is introduced where the mobile brane, the inflaton field, is moving relativistically inside a Lifshitz throat with an arbitrary anisotropic scaling exponent $z$. After dimensional reduction to four dimension the general covariance is broken explicitly both in the matter and the gravitational sectors. The general action for the metric and matter field perturbations are obtained and it is shown to be similar to the classifications made in the effective field theory of inflation literature.

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