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000331506 005__ 20211110143305.0
000331506 0247_ $$2arXiv$$aarXiv:1706.03774
000331506 0247_ $$2datacite_doi$$a10.3204/PUBDB-2017-07908
000331506 0247_ $$2inspire$$ainspire:1604857
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000331506 041__ $$aEnglish
000331506 0881_ $$aDESY-17-082; arXiv:1706.03774
000331506 088__ $$2DESY$$aDESY-17-082
000331506 088__ $$2arXiv$$aarXiv:1706.03774
000331506 1001_ $$0P:(DE-H253)PIP1027465$$aDias, Mafalda$$b0
000331506 245__ $$aSeven Lessons from Manyfield Inflation in Random Potentials
000331506 260__ $$c2017
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000331506 520__ $$aWe study inflation in models with many interacting fields subject to randomly generated scalar potentials. We use methods from non-equilibrium random matrix theory to construct the potentials and an adaption of the transport method to evolve the two-point correlators during inflation. This construction allows, for the first time, for an explicit study of models with up to 100 interacting fields supporting a period of approximately saddle-point inflation. We determine the statistical predictions for observables by generating over 30,000 models with 2-100 fields supporting at least 60 efolds of inflation. These studies lead us to seven lessons: i) Manyfield inflation is not single-field inflation, ii) The larger the number of fields, the simpler and sharper the predictions, iii) Planck compatibility is not rare, but future experiments may rule out this class of models, iv) The smoother the potentials, the sharper the predictions, v) Hyperparameters can transition from stiff to sloppy, vi) Despite tachyons, isocurvature can decay, vii) Eigenvalue repulsion drives the predictions. We conclude that many of the generic predictions of single-field inflation can be emergent features of complex inflation models.
000331506 536__ $$0G:(DE-HGF)POF3-611$$a611 - Fundamental Particles and Forces (POF3-611)$$cPOF3-611$$fPOF III$$x0
000331506 536__ $$0G:(EU-Grant)647995$$aSTRINGFLATION - Inflation in String Theory - Connecting Quantum Gravity with Observations (647995)$$c647995$$fERC-2014-CoG$$x1
000331506 588__ $$aDataset connected to INSPIRE
000331506 650_7 $$2INSPIRE$$amatrix model: random
000331506 650_7 $$2INSPIRE$$ainflation: model
000331506 650_7 $$2INSPIRE$$apotential: random
000331506 650_7 $$2INSPIRE$$apotential: scalar
000331506 650_7 $$2INSPIRE$$asaddle-point approximation
000331506 650_7 $$2INSPIRE$$acorrelation function
000331506 650_7 $$2INSPIRE$$aisocurvature
000331506 650_7 $$2INSPIRE$$astatistical
000331506 650_7 $$2INSPIRE$$atachyon: field theory
000331506 650_7 $$2INSPIRE$$asatellite: Planck
000331506 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0
000331506 7001_ $$0P:(DE-H253)PIP1027475$$aFrazer, Jonathan$$b1
000331506 7001_ $$0P:(DE-HGF)0$$aMarsh, M. c. David$$b2$$eCorresponding author
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