2008/01/28 by Naoki Seto, Atsushi Taruya · 1 citation
Physics and Astronomy · #Pulsars and Gravitational Waves Research #Radio Astronomy Observations and Technology #Superconducting and THz Device Technology #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevd.77.103001
published as Phys.Rev.D77:103001,2008 · 27 pages
arxiv created 2008/01/28 · openalex publication_date 2008/05/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Stokes V parameter characterizes asymmetry of amplitudes between right- and left-handed waves, and the nonvanishing value of the V parameter yields a circularly polarized signal. Cosmologically, the V parameter may be a direct probe for parity violation in the Universe. In this paper, we theoretically investigate a measurement of this parameter, particularly focusing on the gravitational-wave backgrounds observed via ground-based interferometers. In contrast to the traditional analysis that only considers the total amplitude (or equivalently \ensuremathΩGW), the signal analysis including a circular-polarized mode has a rich structure due to the multidimensionality of target parameters. We show that, by using the network of next-generation detectors, separation between polarized and unpolarized modes can be performed with small statistical loss induced by their correlation.