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High-Frequency Gravitational Wave Propagating Through the Vacuum Robertson-Walker Spacetime and Its Energy-Momentum Pseudo-tensor

Author: LiJianJie
Tutor: LiFangZuo
School: Chongqing University
Course: Theoretical Physics
Keywords: High - frequency gravitational waves Robertson-Walker space-time Energy-momentum 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 high-frequency gravitational waves through curved background universe. For the study of the physical behavior of high-frequency gravitational waves in vacuum-Robertson-Walker (RW) spacetime much, especially in this case, the dynamics of the high-frequency gravitational waves counterproductive less. Therefore, this is done through the physical behavior of the high-frequency 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 high-frequency 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 high-frequency gravitational waves. The departure from the Einstein field equations, consider metric second-order perturbation rewrite the vacuum Einstein field equations, Einstein tensor and second-order perturbation as a new curved spacetime metric \wave propagation and energy vacuum RW spacetime momentum Pseudo tensor in the background space-time. Momentum pseudo-tensor by the definition of the energy of high-frequency gravitational waves Einstein tensor metric second-order perturbation for several wavelengths within the average of the average of the Brill-Hartle found this under the definition of high-frequency gravitational waves The energy density is positive definite, and the gravitational field energy momentum pseudo-tensor Landau-Lifshitz do the same average value of the Brill-Hartle is equal representation in the range of several wavelengths. Obtained high-frequency gravitational wave propagation equation in curved background space-time, the propagation equation in curved spacetime than the propagation equation in flat spacetime a correction term, high-frequency 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 high-frequency gravitational wave propagation equation in curved spacetime is debatable. Consider the second-order 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 high-frequency gravitational wave background space-time. Energy density and pressure density of high-frequency gravitational waves will affect the time evolution of the scale factor of the background space-time 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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