Gravitational memory and compact extra dimensions

Journal Article · 25 January 2022 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.105.024072 · OSTI ID:1980011

Ferko, Christian  ^[1]; Satishchandran, Gautam  ^[2]; Sethi, Savdeep ^[2]

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1. University of Chicago, IL (United States); University of California, Davis, CA (United States); OSTI
2. University of Chicago, IL (United States)

Here we develop a general formalism for treating radiative degrees of freedom near $$\mathscr{I}^+$$ in theories with an arbitrary Ricci-flat internal space. These radiative modes are encoded in a generalized news tensor which decomposes into gravitational, electromagnetic, and scalar components. We find a preferred gauge which simplifies the asymptotic analysis of the full nonlinear Einstein equations and makes the asymptotic symmetry group transparent. This asymptotic symmetry group extends the Bondi–Metzner–Sachs (BMS) group to include angle-dependent isometries of the internal space. We apply this formalism to study memory effects, which are expected to be observed in future experiments, that arise from bursts of higher-dimensional gravitational radiation. We outline how measurements made by gravitational wave observatories might probe properties of the compact extra dimensions.

• Research Organization: University of California, Davis, CA (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDOE Office of Science (SC); University of California
• Grant/Contract Number: SC0009999
• OSTI ID: 1980011
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 2 Vol. 105; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English