LOCAL NON-GAUSSIANITY FROM RAPIDLY

VARYING SOUND SPEEDSJON EMERY WITH GIANMASSIMO TASINATO AND DAVID WANDS

ARXIV:1203.6625 - JCAP08(2012)005

COSMO12 – 13/9/2012

INTRODUCTION

INFLATION AND NON-GAUSSIANITY

BREAKING THE DEGENERACIES

MULTIPLE-DBI INFLATION

AFFECT OF MULTIPLE SOUND SPEEDS ON LOCAL TYPE NON-GAUSSIANITY

COSMO12 – 13/9/2012

INFLATION AND NON-GAUSSIANITY

COSMO12 – 13/9/2012KOMATSU ET AL. (2008)

INFLATION AND NON-GAUSSIANITY

COSMO12 – 13/9/2012KOMATSU ET AL. (2008)

INFLATION AND NON-GAUSSIANITY

COSMO12 – 13/9/2012KOMATSU ET AL. (2008)

EXAMPLE: TWO FIELD INFLATION

INFLATION AND NON-GAUSSIANITY

COSMO12 – 13/9/2012

BYRNES AND TASINATO (2008)

INFLATION AND NON-GAUSSIANITYEXAMPLE: DBI INFLATION

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6D CALABI-YAU

ALISHAHIHA, SILVERSTEIN AND

TONG (2004)

INFLATION AND NON-GAUSSIANITY

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PROBLEM: DEGENERACY

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INFLATION AND NON-GAUSSIANITY

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PROBLEM: DEGENERACY

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fNL

PLANCK:

WMAP:

INFLATION AND NON-GAUSSIANITY

COSMO12 – 13/9/2012

INFLATION AND NON-GAUSSIANITY

VANILLA MULTIPLE FIELDS

NON-CANONICAL

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MULTIPLE-DBI INFLATION

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VANILLA MULTIPLE FIELDS

NON-CANONICAL

MULTIPLE FIELDS

NON-CANONICAL

MULTIPLE-DBI INFLATION

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VANILLA

CHOOSE A MODEL: TWO FIELD

DBI

MULTIPLE-DBI INFLATION

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BACKGROUND: HAMILTON-JACOBI

SAME SOUND SPEEDS AT HORIZON CROSSING

MULTIPLE-DBI INFLATION

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PERTURBATIONS: DELTA N AND SEPARABLE HUBBLE

MULTIPLE-DBI INFLATION

BYRNES & TASINATO (2009)

VERNIZZI & WANDS (2006)

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MULTIPLE-DBI INFLATION

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RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

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RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

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RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

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RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

COSMO12 – 13/9/2012BYRNES & TASINATO (2009)

RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

BYRNES & TASINATO (2009)COSMO12 – 13/9/2012

RESULTS: ANALYTICAL EXPRESSION

MULTIPLE-DBI INFLATION

WARP FACTORSCOSMO12 – 13/9/2012

RESULTS: INFLATION IN TWO CUT-OFF THROATS

MULTIPLE-DBI INFLATION

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TRAJECTORIES

RESULTS: INFLATION IN TWO CUT-OFF THROATS

MULTIPLE-DBI INFLATION

COSMO12 – 13/9/2012SOUND SPEEDS

RESULTS: INFLATION IN TWO CUT-OFF THROATS

MULTIPLE-DBI INFLATION

COSMO12 – 13/9/2012NON-LINEARITY PARAMETER

RESULTS: INFLATION IN TWO CUT-OFF THROATS

MULTIPLE-DBI INFLATION

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THIRD ORDER ACTION

PATH INTEGRAL FORMALISM

PROGRESS: EQUILATERAL CONTRIBUTION

SEERY & LYDSEY (2005)

MULTIPLE-DBI INFLATION

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EQUILATERAL NON-LINEARITY PARAMETER

PROGRESS: EQUILATERAL CONTRIBUTION

MULTIPLE-DBI INFLATION

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EQUILATERAL NON-LINEARITY PARAMETER

PROGRESS: EQUILATERAL CONTRIBUTION

CONCLUSIONS

COSMO12 – 13/9/2012

INFLATION AND NON-GAUSSIANITY

BREAKS THE DEGENERACIES OF REALISTIC MODELS

MULTIPLE-DBI INFLATION

RAPIDLY VARYING SOUND SPEEDS CAN PRODUCE

LARGE LOCAL TYPE NON-GAUSSIANITY