Optimal Location of Two Laser-interferometric Detectors for Gravitational Wave Backgrounds at 100 MHz

Abstract

Recently, observational searches for gravitational wave background (GWB) have been developed and given constraints on the energy density of GWB in a broad range of frequencies. These constraints have already resulted in the rejection of some theoretical models of relatively large GWB spectra. However, at 100 MHz, there is no strict upper limit from direct observation, though an indirect limit exists due to He4 abundance due to big-bang nucleosynthesis. In our previous paper, we investigated the detector designs that can effectively respond to GW at high frequencies, where the wavelength of GW is comparable to the size of a detector, and found that the configuration, a so-called synchronous-recycling interferometer is best at these sensitivity. In this paper, we investigated the optimal location of two synchronous-recycling interferometers and derived their cross-correlation sensitivity to GWB. We found that the sensitivity is nearly optimized and hardly changed if two coaligned detectors are located within a range 0.2 m, and that the sensitivity achievable in an experiment is far below compared with the constraint previously obtained in experiments.

17 pages, 6 figures

References in corpus (28)

• Gravitational Wave Experiments and Early Universe Cosmology
• The Pre-Big Bang Scenario in String Cosmology
• Detecting a stochastic background of gravitational radiation: Signal processing strategies and sensitivities
• Quintessential inflation
• Gravitational Waves from Coalescing Black Hole MACHO Binaries
• Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
• The Sensitivity of Ligo to a Stochastic Background, and its Dependance on the Detector Orientations
• Production and detection of relic gravitons in quintessential inflationary models
• A stochastic background of gravitational waves from hybrid preheating
• Relic Gravitational Waves from String Cosmology
• A new cosmic microwave background constraint to primordial gravitational waves
• Direct detection of the inflationary gravitational wave background
• Gravitational waves constraints on post-inflationary phases stiffer than radiation
• Black Hole Binary Formation in the Expanding Universe --- Three Body Problem Approximation ---
• Searching for a Stochastic Background of Gravitational Waves with LIGO
• Reheating After Quintessential Inflation and Gravitational Waves
• Quintessence and Gravitational Waves
• Detecting extra dimensions with gravity wave spectroscopy: the black string brane-world
• Dilaton Contributions to the Cosmic Gravitational Wave Background
• Search for a stochastic background of 100-MHz gravitational waves with laser interferometers
• Laser-interferometric Detectors for Gravitational Wave Background at 100 MHz : Detector Design and Sensitivity
• A detector of small harmonic displacements based on two coupled microwave cavities
• A gravitational wave window on extra dimensions
• Very high frequency gravitational wave background in the universe
• Gravitational Waves from Sub-lunar Mass Primordial Black Hole Binaries - A New Probe of Extradimensions
• Sensitivity of a VIRGO pair to stochastic GW backgrounds
• Effective Search Templates for a Primordial Stochastic Gravitational Wave Background
• Resonant speed meter for gravitational wave detection

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• Precision calculations of the gravitational wave background spectrum from inflation
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• Baryogenesis in the paradigm of quintessential inflation
• Observational signatures of the parametric amplification of gravitational waves during reheating after inflation
• Experimental Quantum Enhanced Optical Interferometry
• Single phase and correlated phase estimation with multi-photon annihilated squeezed vacuum states: An energy balancing scenario
• Gravitational waves in the black string braneworld