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Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays
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Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays
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We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries valuable information of inflation models. We show that an appropriate filter function for three point correlations enables us to extract a specific configuration of momentum triangles in bispectra. We also calculate the overlap reduction functions and discuss strategy for detecting the bispectrum with multiple pulsars.
Forward citations
Cited by 2 Pith papers
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New test of modified gravity with gravitational wave experiments
For a stationary, isotropic gravitational wave background, three-point correlations are produced only by scalar polarizations, giving a new null test for modified gravity.
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Explores SKAO detection of scalar-induced GW backgrounds as probes of primordial non-Gaussianity and parity violation, with LSS cross-correlation to improve SNR.
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