A5025002807- Cosmology and Gravitation Theories
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Geophysics and Gravity Measurements
- Stochastic processes and financial applications
- Copper-based nanomaterials and applications
- Advanced Thermodynamics and Statistical Mechanics
- solar cell performance optimization
- Cutaneous lymphoproliferative disorders research
- Engineering and Information Technology
- Solar-Powered Water Purification Methods
- Occupational Health and Safety in Workplaces
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Cancer and Skin Lesions
- Solar and Space Plasma Dynamics
- Knowledge Societies in the 21st Century
- Nail Diseases and Treatments
- Advanced DC-DC Converters
- Technology in Education and Healthcare
- Pulsars and Gravitational Waves Research
Universidad Autónoma de Madrid
2022-2024
Instituto de Física Teórica
2022-2024
Consejo Superior de Investigaciones Científicas
2024
Institut de Recerca en Energia de Catalunya
2018-2020
Universitat de Barcelona
2018-2020
Hospital Universitario Ramón y Cajal
2004
Abstract We revisit the idea that inflaton may have dissipated part of its energy into a thermal bath during inflation, considering monomial inflationary potentials and three different forms dissipation rate. Using numerical Fokker-Planck approach to describe stochastic dynamics fluctuations, we confront this scenario with current bounds on spectrum curvature fluctuations primordial gravitational waves. also obtain purely analytical approximations improve over previously used ones in small...
Abstract We show, both analytically and numerically, that non-Gaussian tails in the probability density function of curvature perturbations arise ultra-slow-roll inflation from δN formalism, without invoking stochastic inflation. Previously reported discrepancies between approaches are a consequence not correctly accounting for momentum perturbations. Once they taken into account, agree to an excellent degree. The shape tail depends strongly on phase space
We study the generation of a localized peak in primordial spectrum curvature perturbations from transient dissipative phase during inflation, leading to large population black holes. The enhancement power occurs due stochastic thermal noise sourcing fluctuations. solve system Einstein equations for many realizations and obtain distribution spectrum. then propose method find its expectation value using deterministic differential equations. In addition, we single equation whose analytic...
We study the non-Gaussian tail of curvature fluctuation, $\zeta$, in an inflationary scenario with a transient ultra slow-roll phase that generates localized large enhancement spectrum $\zeta$. To do so, we implement numerical procedure provides probability distribution $\zeta$ order by perturbation theory. The non-Gaussianities can be shown to arise from its non-linear relation inflaton fluctuations and intrinsic latter, which stem self interactions. find non-Gaussianities, have often been...
We show, both analytically and numerically, that non-Gaussian tails in the probability density function of curvature perturbations arise ultra-slow-roll inflation from $\delta N$ formalism, without invoking stochastic inflation. Previously reported discrepancies between approaches are a consequence not correctly accounting for momentum perturbations. Once they taken into account, agree to an excellent degree. The shape tail depends strongly on phase space
We revisit the idea that inflaton may have dissipated part of its energy into a thermal bath during inflation, considering monomial inflationary potentials and three different forms dissipation rate. Using numerical Fokker-Planck approach to describe stochastic dynamics fluctuations, we confront this scenario with current bounds on spectrum curvature fluctuations primordial gravitational waves. also obtain purely analytical approximations improve over previously used ones in small regime for...
We report on the modeling of semi-transparent ZnTe-based photovoltaic devices. propose innovative strategies to markedly improve performances, so far mostly hindered by a poor band alignment at p-n interface. Alternative buffer materials are considered, and we investigate surface selenization ZnTE films as well feasibility purely ZnTe homojunction. Using realistic set state-of-the-art parameters, solar cell with potential efficiency exceeding 7.5% is demonstrated possible.