Bubble wall perturbations coupled with gravitational waves
نویسندگان
چکیده
We study a coupled system of gravitational waves and a domain wall which is the boundary of a vacuum bubble in de Sitter spacetime. To treat the system, we use the metric junction formalism of Israel. We show that the dynamical degree of the bubble wall is lost and the bubble wall can oscillate only while the gravitational waves go across it. It means that the gravitational backreaction on the motion of the bubble wall can not be ignored. PACS number(s) 04.20.-q 04.40.-b 98.80.Cq 98.80.Hw E-mail:[email protected] E-mail:[email protected]
منابع مشابه
The Spectrum of Gravitational Wave Perturbations in the One-Bubble Open Inflationary Universe
We give the initial spectrum of quantized gravitational waves in the context of the one-bubble open inflationary universe scenario. In determining the quantum state after the bubble nucleation we adopt the prescription to require the analyticity of positive frequency functions in half of the Euclidean extension of the background O(3, 1)symmetric spacetime. We find the spectrum is well behaved a...
متن کاملBubble fluctuations in Ω < 1 inflation
In the context of the open inflationary universe, we calculate the amplitude of quantum fluctuations which deform the bubble shape. These give rise to scalar field fluctuations in the open Friedman-Robertson-Walker universe which is contained inside the bubble. One can transform to a new gauge in which matter looks perfectly smooth, and then the perturbations behave as tensor modes (gravitation...
متن کاملBubble Uctuations in < 1 Innation
In the context of the open innationary universe, we calculate the amplitude of quantum uctuations which deform the bubble shape. These give rise to scalar eld uctuations in the open Friedman-Robertson-Walker universe which is contained inside the bubble. One can transform to a new gauge in which matter looks perfectly smooth, and then the perturbations behave as tensor modes (gravitational wave...
متن کاملSound Shell Model for Acoustic Gravitational Wave Production at a First-Order Phase Transition in the Early Universe.
A model for the acoustic production of gravitational waves at a first-order phase transition is presented. The source of gravitational radiation is the sound waves generated by the explosive growth of bubbles of the stable phase. The model assumes that the sound waves are linear and that their power spectrum is determined by the characteristic form of the sound shell around the expanding bubble...
متن کاملModeling and investigating the effect of ultrasound waves pressure on the microbubble oscillation dynamics in microvessels containing an incompressible fluid (Research Article)
Understanding the dynamics of microbubble oscillation in an elastic microvessel is important for the safe and effective applications of ultrasound contrast agents in imaging and therapy. Numerical simulations based on 2D finite element model are performed to investigate the effect of acoustic parameters such as pressure and frequency on the dynamic interaction of the fluid-blood-vessel system. ...
متن کامل