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Measuring Parity Violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network

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arxiv 2011.07059 v2 pith:AUYGNHRM submitted 2020-11-13 astro-ph.CO gr-qc

Giorgio Orlando , Mauro Pieroni , Angelo Ricciardone This is my paper
classification astro-ph.COgr-qc
keywords backgroundgravitationalsgwbchiralitycircularisotropicnetworkparity
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Parity violation is a powerful observable to distinguish a cosmological background of Gravitational Waves (GWs) from an astrophysical one. Planar single GW interferometers, both on ground and in space, are unable to measure the net circular polarization of an isotropic Stochastic Gravitational Wave Background (SGWB). In this paper, we explore the possibility of detecting circular polarization of an isotropic SGWB by cross-correlating two space-based detectors planned to be launched around 2034: LISA and Taiji. We compute the response of such a network to chirality and we perform a Fisher forecast analysis on the $I$ and $V$ Stokes parameters for the SGWB. We find that a clear measurement of chirality can be claimed for a maximally chiral signal with $h^2 \, \Omega_{\rm GW} \simeq 10^{-12}$.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Circularly polarized gravitational waves from parity-violating scalar-tensor theory

    gr-qc 2026-02 conditional novelty 6.0 of 10

    In the "Qi-Xiu" parity-violating scalar-tensor theory, the L3 and L4 interactions leave linear gravitational-wave propagation GR-like but still generate circularly polarized scalar-induced gravitational waves.

  2. Inferring the stochastic gravitational-wave background from eccentric stellar-mass binary black holes with spaceborne detectors

    gr-qc 2025-10 conditional novelty 6.0 of 10

    Eccentric black-hole-binary backgrounds from globular clusters and isolated evolution would look like power-law noise for TianQin/LISA/Taiji, but AGN-formed binaries produce a turnover that LISA and Taiji can distinguish.

  3. Twisted echoes of an odd quartet: Scalar-induced gravitational waves as a probe of primordial parity-violation

    astro-ph.CO 2025-07 conditional novelty 6.0 of 10

    A parity-odd primordial trispectrum imprints measurable left-right asymmetry in scalar-induced gravitational waves, and the chirality ratio directly tracks the parity-odd to parity-even trispectrum amplitude ratio.

  4. Constraining primordial non-Gaussianity and parity-violation through Scalar-Induced Gravitational Waves with next-generation ground-based interferometers

    astro-ph.CO 2026-07 conditional novelty 5.0 of 10

    ET+CE forecast: injected SIGW parameters (A_p, f_peak, f_NL, tau_NL, parity-odd tau_tilde_NL) are recovered within 1-2 sigma despite an astrophysical foreground, but the chiral V-mode is sub-threshold (SNR 0.5-1.9).

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