Results 91 to 100 of about 978,154 (293)

Scalar perturbation spectra from warm inflation

, 2003
We present a numerical integration of the cosmological scalar perturbation equations in warm inflation. The initial conditions are provided by a discussion of the thermal fluctuations of an inflaton field and thermal radiation using a combination of ...
A. Albrecht, A. Berera, A. Berera, A. Berera, A. Berera, A. Berera, A. Berera, A. Berera, A. Berera, A. Berera, A. Hosoya, A. Linde, A.D. Linde, A.D. Linde, A.H. Guth, A.N. Taylor, A.R. Liddle, A.R. Liddle, Arjun Berera, C.L. Bennett, D.H. Lyth, E. Calzeta, E. Calzeta, E.D. Stewart, E.J. Copeland, G.J.S. Habib, H. Kodama, H.P. de Oliveira, H.P. de Oliveira, H.P. de Oliveira, H.V. Peiris, I.D. Lawrie, I.G. Moss, I.G. Moss, Ian G. Moss, J. chan Hwang, J. Martin, J. Schwinger, J. Yokoyama, J. Yokoyama, J.M. Bardeen, J.M.F. Maia, L. Dolan, L.P. Chimento, L.V. Keldysh, Lisa M. H. Hall, M. Bellini, M. Gleiser, P.P.A.R. Liddle, S.M. Leach, S.R. Lonsdale, S.W. Hawking, V.N. Lukash, W. Lee   +53 more
core   +1 more source

Trans-Planckian effects in warm inflation [PDF]

Journal of Cosmology and Astroparticle Physics, 2019
We study the effect of a non-trivial vacuum prescription on warm inflation observables, namely the power spectrum of the comoving curvature perturbation. Non-trivial choice of vacuum, can provide information about trans-Planckian physics. Traditionally, the initial condition for inflation is chosen to be the usual Bunch-Davies vacuum.
Nezhad, H. Bouzari, Shojai, F.
openaire   +2 more sources

Uncovering renewable energy policy impact channels on land values, the local farm structure, and farmland heterogeneity

American Journal of Agricultural Economics, EarlyView.
Abstract Germany's Renewable Energy Sources Act (REA), enacted in 2000 and subsequently amended, subsidized national renewable energy production with fixed feed‐in tariffs for renewable energy sources (RE) from wind, solar, and biogas. Empirical studies suggest that the policy was creating windfall effects for landowners and attribute farmland use ...
Lars Isenhardt, Stefan Seifert, Saskia Wolff, Tobia Lakes, Marten Graubner, Axel Werwatz, Silke Hüttel   +6 more
wiley   +1 more source

Role of trans-Planckian modes in cosmology

Journal of High Energy Physics, 2020
Motivated by the old trans-Planckian (TP) problem of inflationary cosmology, it has been conjectured that any consistent effective field theory should keep TP modes ‘hidden’ behind the Hubble horizon, so as to prevent them from turning classical and ...
Arjun Berera, Suddhasattwa Brahma, Jaime R. Calderón   +2 more
doaj   +1 more source

Archaeological Damage Assessment in Conflict Zones: Integrating Satellite Imagery and Ground Surveys in Daraa, Syria

Archaeological Prospection, EarlyView.
ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem, Kristen Hopper, Ismael M. Ibraheem, Andreas Maier, Mohammad Khair Nassrallah, Jürgen Richter   +5 more
wiley   +1 more source

A relativistic calculation of super-Hubble suppression of inflation with thermal dissipation

, 2000
We investigated the evolution of the primordial density perturbations produced by inflation with thermal dissipation. A full relativistic analysis on the evolution of initial perturbations from the warm inflation era to a radiation-dominated universe has
Bardeen J M, Bardeen J M, Fang L Z, Hairer E, Hosaya A, Kodama H, Kolb E W, Lee W L, Li-Zhi Fang, Starobinsky A A, Wolung Lee   +10 more
core   +1 more source

Constraint on the Higgs-Dilaton Potential via Warm Inflation in Two-Time Physics

Advances in High Energy Physics, 2022
Within the SP2,R symmetry, the two-time model (2T model) has six dimensions with two dimensions of time and the dilaton field that can be identified as inflaton in a warm inflation scenario with potential of the form ~ϕ4.
Vo Quoc Phong, Ngo Phuc Duc Loc
doaj   +1 more source

Constraining warm inflation with CMB data [PDF]

Journal of Cosmology and Astroparticle Physics, 2018
We confront the warm inflation observational predictions directly with the latest CMB data. We focus on a linear temperature (T) dissipative coefficient combined with the simplest model of inflation, a quartic chaotic potential. Although excluded in its standard cold inflation version, dissipation reduces the tensor-to-scalar ratio and brings the ...
Bastero-Gil, Mar, Bhattacharya, Sukannya, Dutta, Koushik, Gangopadhyay, Mayukh Raj   +3 more
openaire   +2 more sources

Simulating competition in the US bioeconomy to produce hard‐to‐electrify transportation fuels using limited biomass resources

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract This study presents a novel bioeconomy optimization framework, BiOpt, designed to address critical questions regarding the strategic use of limited US biomass resources for biofuel production. By integrating detailed techno‐economic analyses, life cycle assessments, and resource assessment data, BiOpt optimizes resource distributions across ...
Nicholas A. Carlson, Emily K. Newes, Kristen Lu, Eric C. D. Tan   +3 more
wiley   +1 more source

The spread of non‐native species

Biological Reviews, EarlyView.
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock, Ali Serhan Tarkan, Irene Martín‐Forés, Stelios Katsanevakis, Ronaldo Sousa, Ismael Soto, Andy J. Green, Antonín Kouba, Teun Everts, Victoria Dominguez Almela, Nadège Belouard, Cang Hui, Jamie Bojko, Victor Deklerck, Margaux Boeraeve, Franz Essl, J. Robert Britton   +16 more
wiley   +1 more source