Response of Interferometric Detectors to Scalar Gravitational Waves

Details Response of Interferometric Detectors to Scalar Gravitational Waves Response of Interferometric Detectors to Scalar Gravitational Waves

2000-06-22

arxiv.org/abs/gr-qc/0006079v1

Phys.Rev.D63:082001,2001

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, 7 figures

Scientific paper

10.1103/PhysRevD.63.082001

We rigorously analyze the frequency response functions and antenna sensitivity patterns of three types of interferometric detectors to scalar mode of gravitational waves which is predicted to exist in the scalar-tensor theory of gravity. By a straightforward treatment, we show that the antenna sensitivity pattern of the simple Michelson interferometric detector depends strongly on the wave length $\lambda_{\rm SGW}$ of the scalar mode of gravitational waves if $\lambda_{\rm SGW}$ is comparable to the arm length of the interferometric detector. For the Delay-Line and Fabry-Perot interferometric detectors with arm length much shorter than $\lambda_{\rm SGW}$, however, the antenna sensitivity patterns depend weakly on $\lambda_{\rm SGW}$ even though $\lambda_{\rm SGW}$ is comparable to the effective path length of those interferometers. This agrees with the result obtained by Maggiore and Nicolis.

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