Search results for "Curved space"

showing 5 items of 45 documents

Reexamination of the Power Spectrum in De Sitter Inflation

2008

4 pages, 1 table.-- PACS nrs.: 98.80.Cq, 04.62.+v.-- PMID: 18999735 [PubMed].

PhysicsQuantum field theory in curved spacetime010308 nuclear & particles physicsVacuum stateGeneral Physics and AstronomySpectral densityAstrophysics::Cosmology and Extragalactic AstrophysicsInflaton01 natural sciences[PACS] Quantum fields in curved spacetimeMassless particleGeneral Relativity and Quantum CosmologyAmplitude[PACS] Particle-theory and field-theory models of the early UniverseDe Sitter universeQuantum mechanicsQuantum electrodynamics0103 physical sciences010306 general physicsQuantum fluctuationPhysical Review Letters
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The time-harmonic Maxwell equations

1996

In this chapter we shall see that the solution of the time-harmonic Maxwell equations with real coefficients can be transformed to time independent partial differential equations with complex coefficients. Then we introduce a finite element approximation proposed in [Křižek, Neittaanmaki, 1989]. A similar technique is analyzed in [Křižek, Neittaanmaki, 1984b], [Monk, 1992a] (for fully time dependent problems see, e.g., [Monk 1992b,c]).

Physicssymbols.namesakeJefimenko's equationsClassical mechanicsTheoretical and experimental justification for the Schrödinger equationMaxwell's equationsMaxwell's equations in curved spacetimesymbolsInhomogeneous electromagnetic wave equationMatrix representation of Maxwell's equationsMaxwell relationsElectromagnetic tensor
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Maxwell’s Equations

2012

The empirical basis of electrodynamics is defined by Faraday’s law of induction, by Gauss’ law, by the law of Biot and Savart and by the Lorentz force and the principle of universal conservation of electric charge. These laws can be tested – confirmed or falsified – in realistic experiments. The integral form of the laws deals with physical objects that are one-dimensional, two-dimensional, or three-dimensional, that is to say, objects such as linear wires, conducting loops, spatial charge distributions, etc. Thus, the integral form depends, to some extent, on the concrete experimental set-up. To unravel the relationships between seemingly different phenomena, one must switch from the integ…

Physicssymbols.namesakeJefimenko's equationsClassical mechanicsTheoretical and experimental justification for the Schrödinger equationMaxwell's equationsMaxwell's equations in curved spacetimesymbolsMatrix representation of Maxwell's equationsInhomogeneous electromagnetic wave equationLorentz forceElectromagnetic tensor
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Quantum effects, anomalies and renormalization in Electrodynamics, Cosmology and Black Holes

2023

La Teoria Quàntica de Camps en Espais Corbats ha demostrat ser una teoria semi-clàssica molt útil per a l'estudi de fenòmens físics que combinen gravetat i efectes quàntics. En particular, prediu que la dinàmica d'un camp gravitacional de fons pot excitar espontàniament partícules a partir del buit quàntic. El procés de producció de partícules té una importància especial en l'estudi de l'univers primerenc en cosmologia i és la base de la radiació de Hawking en la física dels forats negres. Físicament, aquest efecte quàntic és anàleg a l'efecte Schwinger ben conegut en l'electrodinàmica quàntica. L'objectiu d'aquesta Tesi és estudiar aquest fenomen general de producció de partícules, així co…

curved spacequantumUNESCO::FÍSICAanomaliessemi-classicquantum field theoryblack holesrenormalization
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Quantum aspects originated by Gravitation: from cosmology to astrophysics

2018

El estudio de campos cuánticos que se propagan en espacio-tiempos clásicos, curvos y dinámicos, ofrece una primera manera de evaluar las consecuencias de la teoría cuántica cuando los fenómenos gravitatorios no son despreciables. Esta es una cuestión importante que debe ser abordada cuando un campo gravitatorio intenso juega un papel principal en la dinámica de un sistema físico, tal como ocurre durante el universo temprano (inflación cósmica) o en la formación de agujeros negros astrofísicos. Una de las características más sorprendentes de esta materia es quizás el hecho de que el cálculo de observables físicos, incluso para campos sin interacción, frecuentemente involucra operadores cuadr…

renormalization in curved spacetimeelectromagnetic field:FÍSICA [UNESCO]UNESCO::FÍSICAgeneral relativityclassical symmetriesinflationquantum anomaliesquantum field theorycosmology
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