Periodic orbits and gravitational radiation from extreme mass-ratio inspirals as probes of black hole quantum hair.
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| Title: | Periodic orbits and gravitational radiation from extreme mass-ratio inspirals as probes of black hole quantum hair. |
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| Authors: | Zhang, Yiru1 (AUTHOR), Tang, Meirong1 (AUTHOR), Xu, Zhaoyi1 (AUTHOR) zyxu@gzu.edu.cn |
| Source: | European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-14. 14p. |
| Subjects: | Black holes, Quantum gravity, Gravitational waves, Orbital mechanics |
| Abstract: | The classical no-hair theorem states that stationary black holes in general relativity can be completely described by only a small set of global parameters. Within this framework, no additional geometric structures are expected to persist outside the event horizon. However, quantum vacuum polarization may introduce small modifications to the near-horizon geometry, effectively giving rise to what is known as quantum hair. Such corrections may provide a possible window into the microscopic structure and thermodynamic properties of black holes. In this work, we examine how the quantum hair parameter γ influences the periodic orbital dynamics of test bodies in extreme mass-ratio inspirals (EMRIs) and their associated gravitational-wave emission. We find that γ significantly modifies the characteristic radii and angular momenta of two important circular orbits, namely the marginally bound orbit (MBO) and the innermost stable circular orbit (ISCO), leading to a shift in the allowed region of the energy–angular momentum (E–L) phase space. Based on the rational number q classification, we further show that quantum corrections tend to enhance the zoom–whirl orbital behavior. Within the conservative Numerical Kludge framework adopted in this work, the quantum hair parameter modifies the effective potential and induces small shifts in the fundamental orbital frequencies, which in turn produce cumulative phase differences in long-duration waveform evolutions. These results provide an illustrative example of how quantum-corrected geometry can affect conservative orbital dynamics and waveform phasing, and they offer a phenomenological basis for future, more complete studies of possible quantum-gravity imprints in EMRI signals. [ABSTRACT FROM AUTHOR] |
| Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 194633890 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Periodic orbits and gravitational radiation from extreme mass-ratio inspirals as probes of black hole quantum hair. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Yiru%22">Zhang, Yiru</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tang%2C+Meirong%22">Tang, Meirong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Zhaoyi%22">Xu, Zhaoyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zyxu@gzu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. May2026, Vol. 86 Issue 5, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Black+holes%22">Black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+gravity%22">Quantum gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitational+waves%22">Gravitational waves</searchLink><br /><searchLink fieldCode="DE" term="%22Orbital+mechanics%22">Orbital mechanics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The classical no-hair theorem states that stationary black holes in general relativity can be completely described by only a small set of global parameters. Within this framework, no additional geometric structures are expected to persist outside the event horizon. However, quantum vacuum polarization may introduce small modifications to the near-horizon geometry, effectively giving rise to what is known as quantum hair. Such corrections may provide a possible window into the microscopic structure and thermodynamic properties of black holes. In this work, we examine how the quantum hair parameter γ influences the periodic orbital dynamics of test bodies in extreme mass-ratio inspirals (EMRIs) and their associated gravitational-wave emission. We find that γ significantly modifies the characteristic radii and angular momenta of two important circular orbits, namely the marginally bound orbit (MBO) and the innermost stable circular orbit (ISCO), leading to a shift in the allowed region of the energy–angular momentum (E–L) phase space. Based on the rational number q classification, we further show that quantum corrections tend to enhance the zoom–whirl orbital behavior. Within the conservative Numerical Kludge framework adopted in this work, the quantum hair parameter modifies the effective potential and induces small shifts in the fundamental orbital frequencies, which in turn produce cumulative phase differences in long-duration waveform evolutions. These results provide an illustrative example of how quantum-corrected geometry can affect conservative orbital dynamics and waveform phasing, and they offer a phenomenological basis for future, more complete studies of possible quantum-gravity imprints in EMRI signals. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1140/epjc/s10052-026-15715-y Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: Black holes Type: general – SubjectFull: Quantum gravity Type: general – SubjectFull: Gravitational waves Type: general – SubjectFull: Orbital mechanics Type: general Titles: – TitleFull: Periodic orbits and gravitational radiation from extreme mass-ratio inspirals as probes of black hole quantum hair. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Yiru – PersonEntity: Name: NameFull: Tang, Meirong – PersonEntity: Name: NameFull: Xu, Zhaoyi IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 14346044 Numbering: – Type: volume Value: 86 – Type: issue Value: 5 Titles: – TitleFull: European Physical Journal C -- Particles & Fields Type: main |
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