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Inferring fundamental spacetime symmetries with gravitational-wave memory: from LISA to the Einstein Telescope

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arxiv 2310.10718 v2 pith:3LBDSX54 submitted 2023-10-16 gr-qc astro-ph.CO

Boris Goncharov , Laura Donnay , Jan Harms This is my paper
classification gr-qcastro-ph.CO
keywords memorysymmetriesdisplacementeinsteinspacetimespintelescopeamplitude
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We revisit gravitational wave (GW) memory as the key to measuring spacetime symmetries, extending beyond its traditional role in GW searches. In particular, we show how these symmetries may be probed via displacement and spin memory observations, respectively. We further find that the Einstein Telescope's (ET) sensitivity enables constraining the strain amplitude of a displacement memory to 2% and that of spin memory to 22%. Finally, we point out that neglecting memory could lead to an overestimation of measurement uncertainties for parameters of binary black hole (BBH) mergers by about 10% in ET.

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Cited by 3 Pith papers

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

  1. Scalar memory from compact binary coalescences

    gr-qc 2026-05 conditional novelty 7.0 of 10

    In Ricci-coupled scalar-Gauss-Bonnet gravity, the change in scalar charge during binary black hole mergers generates a scalar memory contribution that modifies the total memory signal on observable timescales.

  2. Nonlinear Gravitational Memory in the Post-Minkowskian Expansion

    hep-th 2025-06 conditional novelty 7.0 of 10

    Exact-in-velocity formulas for the O(G^3) nonlinear gravitational memory multipoles from two-body scattering, derived with scattering amplitudes and reverse unitarity, and matched to post-Newtonian results.

  3. Supertranslations in the bulk of spacetime

    hep-th 2025-12 conditional novelty 5.0 of 10

    Supertranslations can be defined in the bulk as changes of null hypersurfaces, extending boundary symmetries into the interior and producing a curvature-dependent memory effect in Schwarzschild.

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