Results 11 to 20 of about 116,428 (235)
Evolution of fNL to the adiabatic limit [PDF]
, 2011 We study inflationary perturbations in multiple-field models, for which zeta typically evolves until all isocurvature modes decay--the "adiabatic limit". We use numerical methods to explore the sensitivity of the nonlinear parameter fNL to the process by
A. Chambers +44 more
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Primordial Gravitational Waves in Bimetric Gravity [PDF]
, 2015 We study primordial tensor power-spectra generated during inflation in bimetric gravity. More precisely, we examine a homogeneous expanding spacetime in a minimal bimetric model with an inflaton and calculate tensor perturbations on the homogeneous ...
Sakakihara, Yuki, Soda, Jiro
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Real-time D-brane condensation [PDF]
, 2003 Unstable D-branes or brane-antibrane systems can decay to lower-dimensional branes. In the effective field theory description, the final state branes are defects in the tachyon field which describes the initial instability.
Alexander +38 more
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Exponential Decay of Contact-patch Friction Steering Moment with Rolling Speed
, 2021 Steering torque is a very important quantity for the driver feeling. In fact, it gives the driver an idea of the road adherence condition during driving. Several models have been developed to simulate shear forces at the contact patch, most of them are based on semi-empirical tire models that account for slip and slip angles. They have good reliability
Jai Prakash +2 more
openaire +3 more sources
Primordial non-Gaussianity from mixed inflaton-curvaton perturbations [PDF]
, 2012 We characterise the primordial perturbations produced due to both inflaton and curvaton fluctuations in models where the curvaton has a quadratic, cosine or hyperbolic potential, and the inflaton potential is characterised by the usual slow-roll ...
Fonseca, José, Wands, David
core +4 more sources
The inflationary origin of the Cold Spot anomaly [PDF]
, 2014 Single-field inflation, arguably the simplest and most compelling paradigm for the origin of our Universe, is strongly supported by the recent results of the Planck satellite and the BICEP2 experiment.
Sanchez, Juan C. Bueno
core +7 more sources
Power of Black Hole Physics: Seeing through the Vacuum Landscape [PDF]
, 2008 In this paper we generalize the black hole bound of arXiv:0706.2050 to de Sitter spaces, and apply it to various vacua in the landscape, with a special emphasis on slow-roll inflationary vacua.
C. Kounnas +26 more
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, 2014 If the large scale anomalies in the temperature power spectrum of the cosmic microwave background are of primordial origin, they may herald modifications to the slow roll inflationary paradigm on the largest scales.
Boyanovsky, Daniel +2 more
core +1 more source
Bilge-Keel Influence on Free Decay of Roll Motion of a Realistic Hull1 [PDF]
Journal of Offshore Mechanics and Arctic Engineering, 2017 The prediction of roll motion of a ship with bilge keels is particularly difficult because of the nonlinear characteristics of the viscous roll damping. Flow separation and vortex shedding caused by bilge keels significantly affect the roll damping and hence the magnitude of the roll response.
Ronald W. Yeung, Yichen Jiang
openaire +2 more sources
Primordial fluctuations from inflation in dRGT bimetric theory of gravity [PDF]
, 2016 We investigate primordial gravitational waves and curvature perturbations in de Rham-Gabadadze-Tolley (dRGT) bimetric gravity. We evaluate the power-spectra in the leading order in slow roll.
Sakakihara, Yuki, Tanaka, Takahiro
core +2 more sources