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High-order expansions of the Detweiler-Whiting singular field in Schwarzschild spacetime

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arxiv 1204.0794 v4 pith:KNFAS77H submitted 2012-04-03 gr-qc

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keywords fieldparametersapplicationapproachapproachescomputedivergesfinite
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The self field of a charged particle has a component that diverges at the particle. We use both coordinate and covariant approaches to compute an expansion of this singular field for generic geodesic orbits in Schwarzschild spacetime for scalar, electromagnetic and graviational cases. We check agreement of both approaches and give, as an application, the calculation of previously unknown regularisation parameters. In this so-called "mode-sum regularization" approach, each mode of the field is finite, while their sum diverges. The sum may be rendered finite and convergent by the subtraction of "regularization parameters". Higher order parameters lead to faster convergence in the mode-sum. As a second example application, we compute high order expressions for the effective source approach to self-force calculations.

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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. Schwarzschild perturbations in Lorenz gauge via elliptic differential equations

    gr-qc 2026-08 conditional novelty 7.0 of 10

    First frequency-domain m-mode calculation of Schwarzschild metric perturbations in Lorenz gauge, solving ten coupled elliptic PDEs and matching known energy fluxes to about four digits.

  2. Black hole mergers beyond general relativity: a self-force approach

    gr-qc 2025-10 unverdicted novelty 7.0 of 10

    Self-force theory is extended to compute merger and ringdown waveforms in beyond-GR black hole binaries under the extreme mass-ratio approximation, with first calculations of self-force corrections to the merger waveform.

  3. Self-force calculations with numerical relativity methods

    gr-qc 2026-06 unverdicted novelty 6.0 of 10

    A new numerical relativity-inspired method achieves exponential convergence for scalar self-force calculations in Kerr spacetime on circular equatorial orbits up to near-extremal spins and the ISCO.

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