Gravitational backreaction

Author: fcqk

August undefined, 2024

WebSep 6, 2024 · Finally, we discuss some impacts that this physics can bear and the possibility of giving a new restriction of the estimation of cosmological variables such as the gravitational wave amplitude with experiments. WebSep 8, 2024 · Second, we compute the gravitational backreaction of the quantum fields in the Misner-AdS spacetime, and show that the null chronology horizon turns into a strong, …

Temperatures of AdS$_2$ black holes and holography revisited

WebJun 27, 2024 · The instability of (quasi) de Sitter spacetime from quantum gravitational effects has been discussed in many works. Especially, the gravitational backreaction from quantum energy momentum tensor is crucial for understanding the low-energy description of quantum gravity and sometimes destabilize the spacetime. In this paper we discuss the … WebJan 29, 2024 · For generic initial data, this instability is regulated by backreaction, and the final state is a near-extremal black hole. The aim of this paper is to study the late time behavior of such black holes analytically using the weakly broken conformal symmetry of their near-horizon region. In particular, gravitational backreaction is accounted for ... tela honduras wikipedia

arXiv:2304.04427v1 [hep-th] 10 Apr 2024

WebMar 3, 2010 · Starting from first principles and general assumptions Newton's law of gravitation is shown to arise naturally and unavoidably in a theory in which space is … WebApr 10, 2024 · Download Citation Temperatures of AdS$_2$ black holes and holography revisited In a dilaton gravity model, we revisit the calculation of the temperature of an evaporating black hole that is ... WebMar 7, 2024 · Backreaction is one of the resources where people can get a better look at deeper science. All the back and forth leads to deeper understanding and frankly, is tremendously entertaining. … tela hp 246 g6

Quantum corrections to the gravitational backreaction

Vacuum stability in the early universe and the backreaction of ...

WebJan 22, 2024 · Another backreaction mechanism is given by the potential gravitational significance of the generated particle density. But since the fluctuations scale as 〈ϕ 2 〉∼H 2 so for the Higgs field we have V (ϕ)∼H 4 ≪H 2 M 2 pl, which indicates that gravitational backreaction becomes relevant only for very large variances and hence ξ’s. WebApr 9, 2024 · Abstract. Solitons are important nonperturbative excitations in superfluids. For holographic superfluids, we numerically construct “dark” solitons that have the symmetry-restored phase at their core. A central point is that we include the gravitational backreaction of the matter fields, which becomes important at low temperatures. tela hp 6460bWebJun 28, 2024 · We determine corrections to the Hubble rate due to graviton loops in a cosmological background spacetime of constant deceleration parameter. The corrections are gauge-invariant, based on a recent proposal for all-order gauge-invariant observables in perturbative quantum gravity. We find explicit expressions for the cases of matter- and … telah pergi

"WebSep 15, 2008 · @article{osti_21250830, title = {Backreaction of cosmological perturbations in covariant macroscopic gravity}, author = {Paranjape, Aseem}, abstractNote = {The problem of corrections to Einstein's equations arising from averaging of inhomogeneities (backreaction) in the cosmological context has gained considerable attention recently. … " - Gravitational backreaction

Gravitational backreaction

UAP Extreme Acceleration Behaviour as Motivation for …

WebNov 2, 2024 · The predictions for the emission of gravitational waves fit exactly on the observations. Hulse and Taylor got a Nobel prize for that in 1993. For the direct detection of gravitational waves you have to measure the deformation of space and time that they cause. You can do this by using very sensitive interferometers. WebJul 24, 2024 · Abstract We present the results of computational gravitational backreaction on simple models of cosmic string loops. These results give us insight into the general …

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WebJul 16, 2024 · We employ gauge-gravity duality to study the backreaction effect of 4-dimensional large-N quantum field theories on constant-curvature backgrounds, and in … WebDec 3, 2010 · Backreaction as an alternative to dark energy and modified gravity. The predictions of homogeneous and isotropic cosmological models with ordinary matter and …

WebCiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The back reaction of gravitational perturbations in a homogeneous background is determined by … WebAug 1, 2024 · Abstract. General relativity predicts its own demise at singularities but also appears to conveniently shield itself from the catastrophic consequences of such singularities, making them safe. For instance, if strong cosmic censorship were ultimately satisfied, spacetime singularities, although present, would not pose any practical …

WebFeb 2, 2009 · We develop a new formalism for the treatment of gravitational backreaction in the cosmological setting. The approach is inspired by projective techniques in non-equilibrium statistical mechanics. WebApr 5, 2024 · However for one of these models, if a fraction ≳𝒪(10 ⁻³ ) of these particles cascades into γ -rays, and if the gravitational backreaction scale follows the Polchinski-Rocha model, then ...

WebJul 15, 2005 · In this paper, the gravitational backreaction of long-wavelength (super-Hubble) scalar metric fluctuations on the perturbations themselves is investigated for a large class of inflationary models. Specifically, the equations describing the evolution of long-wavelength cosmological metric and matter perturbations in an inflationary universe are ...

WebSep 8, 2024 · Second, we compute the gravitational backreaction of the quantum fields in the Misner-AdS$_3$ spacetime, and show that the null chronology horizon turns into a strong, spacelike curvature singularity. This is one of the few controlled, explicit examples where we can see quantum effects change a Cauchy horizon into a spacelike singularity. ... tela honduras playaWebDec 30, 2024 · A bstract. Using the holographic correspondence as a tool, we study the dynamics of first-order phase transitions in strongly coupled gauge theories at finite temperature. Considering an evolution from the large to the small temperature phase, we compute the nucleation rate of bubbles of true vacuum in the metastable phase. telah pergi bahasa inggrisnya adalahWebApr 11, 2024 · The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitational interaction ... telah pergi dalam englishWebThe interaction between the cosmon and neutrinos may solve the “why now problem” for dark energy cosmologies. Within growing neutrino quintessence it leads to the formation of nonlinear neutrino lumps. For a test of su… telah pergi chordWebWe also compute the corrections to the black hole event horizon, surface gravity, and minimum temperature as well as corrections to the photon sphere and quadratic curvature invariants. ... These results ought to provide reasonable approximations to the first-order (one-loop) quantum backreaction on the geometry of asymptotically anti–de ... telah pergi bahasa inggrisnya apaWebJul 19, 2024 · In this paper, the gravitational backreaction of long-wavelength (super-Hubble) scalar metric fluctuations on the perturbations themselves is investigated for a … telah pergi in englishWebDec 27, 2024 · Keywords: cosmology, large scale structure formation, gravitational backreaction, general relativity, N-body simulation, numerical analysis, relativistic simulation (Some figures may appear in colour only in the online journal) 1. Introduction The expansion of the Universe is accelerating. This surprising finding has led to the Nobel telah pergi menghadap ilahi