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Scalarization of isolated black holes in scalar Gauss-Bonnet theory in the fixing-the-equations approach

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arxiv 2403.08705 v1 pith:VAWHJ3LF submitted 2024-03-13 gr-qc

Scalarization of isolated black holes in scalar Gauss-Bonnet theory in the fixing-the-equations approach

Guillermo Lara , Harald P. Pfeiffer , Nikolas A. Wittek , Nils L. Vu , Kyle C. Nelli , Alexander Carpenter , Geoffrey Lovelace , Mark A. Scheel
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William Throwe
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classification gr-qc
keywords blacktheorydriverequationsnumericalsolutionsallowsapproach
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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One of the most promising avenues to perform numerical evolutions in theories beyond General Relativity is the fixing-the-equations approach, a proposal in which new ``driver'' equations are added to the evolution equations in a way that allows for stable numerical evolutions. In this direction, we extend the numerical relativity code SpECTRE to evolve a ``fixed'' version of scalar Gauss-Bonnet theory in the decoupling limit, a phenomenologically interesting theory that allows for hairy black hole solutions in vacuum. We focus on isolated black hole systems both with and without linear and angular momentum, and propose a new driver equation to improve the recovery of such stationary solutions. We demonstrate the effectiveness of the latter by numerically evolving black holes that undergo spontaneous scalarization using different driver equations. Finally, we evaluate the accuracy of the obtained solutions by comparing with the original unaltered theory.

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Cited by 4 Pith papers

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

  1. Towards long and accurate numerical relativity waveforms of binary black holes beyond general relativity

    gr-qc 2026-07 conditional novelty 6.5

    Spectral methods plus comoving fixing-the-equations drivers yield 40+ cycle equal-mass sGB binary waveforms with phase error ≲1 rad, distinguishable from GR and merging earlier.

  2. High-accuracy drivers to simulate black hole binaries beyond general relativity with the fixing-the-equations approach

    gr-qc 2026-07 conditional novelty 6.0

    Comoving tensor-aware driver equations in SpECTRE yield ~40-cycle sGB binary waveforms with O(1) rad phase error and eccentricity ≲10^{-3}, free of spurious spin growth.

  3. Scalarization and descalarization in hyperbolic encounters of black holes

    gr-qc 2026-06 unverdicted novelty 6.0

    Numerical relativity in the decoupling limit reveals dynamical scalarization and spin-induced (de)scalarization during hyperbolic black hole encounters for both signs of the coupling.

  4. Plunge-Merger-Ringdown Tests of General Relativity with GW250114

    gr-qc 2026-01 unverdicted novelty 6.0

    GW250114 data constrains GR deviations in merger amplitude to 10% and frequency to 4% at 90% CL, with first bounds on the (4,4) mode frequency at 6%.