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Gravitational waves in minimal Maxwell $f(R)$ gravity (2507.06094v1)
Published 8 Jul 2025 in gr-qc, astro-ph.CO, and hep-th
Abstract: We discuss the conversion mechanism from scalar field to gravitational waves in magnetic background in $f(R)$ gravity minimal coupled to the Maxwell electrodynamics. Applying the conversion in early universe with primordial magnetic field and the neutron star with strong magnetosphere, the generated gravitational waves, converted from the scalar field, exhibit distinct power spectra which can be potentially probed by future experiments such as DECIGO, BBO, CE and ET.