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HighFrequency Gravitational Wave Propagating Through the Vacuum RobertsonWalker Spacetime and Its EnergyMomentum Pseudotensor
Author: LiJianJie
Tutor: LiFangZuo
School: Chongqing University
Course: Theoretical Physics
Keywords: High  frequency gravitational waves RobertsonWalker spacetime Energymomentum pseudoscalar tensor Kinetic reaction
CLC: P142.84
Type: Master's thesis
Year: 2007
Downloads: 62
Quote: 0
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Abstract
There are many documents in a different model of the universe, and in a variety of field and material under study the physical behavior of highfrequency gravitational waves through curved background universe. For the study of the physical behavior of highfrequency gravitational waves in vacuumRobertsonWalker (RW) spacetime much, especially in this case, the dynamics of the highfrequency gravitational waves counterproductive less. Therefore, this is done through the physical behavior of the highfrequency gravitational waves in vacuum RW universe. This article gave a brief review of the Einstein theory of gravitation, and describes the theory of gravitational radiation. Which focuses on a theoretical study of the highfrequency gravitational waves. Then a more detailed introduction to the history of the gravitational wave detection, and today several laser interferometer gravitational wave detection device, and describes the experimental study of the detection of highfrequency gravitational waves. The departure from the Einstein field equations, consider metric secondorder perturbation rewrite the vacuum Einstein field equations, Einstein tensor and secondorder perturbation as a new curved spacetime metric \wave propagation and energy vacuum RW spacetime momentum Pseudo tensor in the background spacetime. Momentum pseudotensor by the definition of the energy of highfrequency gravitational waves Einstein tensor metric secondorder perturbation for several wavelengths within the average of the average of the BrillHartle found this under the definition of highfrequency gravitational waves The energy density is positive definite, and the gravitational field energy momentum pseudotensor LandauLifshitz do the same average value of the BrillHartle is equal representation in the range of several wavelengths. Obtained highfrequency gravitational wave propagation equation in curved background spacetime, the propagation equation in curved spacetime than the propagation equation in flat spacetime a correction term, highfrequency gravitational waves propagation in homogeneous isotropic universe when the wave front is no longer a plane wave, and pointed out that the existing literature on highfrequency gravitational wave propagation equation in curved spacetime is debatable. Consider the secondorder nonlinear effect of the gravitational wave gravitational wave energy momentum tensor rewritten in the form of a perfect fluid, and gravitational waves as a \, has been the reaction kinetic equations of highfrequency gravitational wave background spacetime. Energy density and pressure density of highfrequency gravitational waves will affect the time evolution of the scale factor of the background spacetime can be found from the kinetics of the reaction equation.

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CLC: > Astronomy,Earth Sciences > Astronomy > Astrophysics > Theoretical Astrophysics > Non heat caused by radiation > Gravitational radiation (gravity waves )
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