Critical scaling for spectral functions.
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| Title: | Critical scaling for spectral functions. |
|---|---|
| Authors: | Kockler, Konrad1 (AUTHOR) kockler@thphys.uni-heidelberg.de, Pawlowski, Jan M.1,2 (AUTHOR), Wessely, Jonas1 (AUTHOR) |
| Source: | European Physical Journal C -- Particles & Fields. Sep2025, Vol. 85 Issue 9, p1-18. 18p. |
| Subjects: | Scalar field theory, Critical exponents, Critical phenomena (Physics), Dimensionless numbers, Spectral theory, Lorentz invariance, Density of states |
| Abstract: | We study real-time scalar ϕ 4 -theory in 2+1 dimensions near criticality. Specifically, we compute the single-particle spectral function and that of the s-channel four-point function in and outside the scaling regime. The computation is done with the spectral functional Callan–Symanzik equation, which exhibits manifest Lorentz invariance and preserves causality. We extract the scaling exponent η from the spectral function and compare our result with that from a Euclidean fixed point analysis. [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.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 188719721 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Critical scaling for spectral functions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kockler%2C+Konrad%22">Kockler, Konrad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kockler@thphys.uni-heidelberg.de</i><br /><searchLink fieldCode="AR" term="%22Pawlowski%2C+Jan+M%2E%22">Pawlowski, Jan M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wessely%2C+Jonas%22">Wessely, Jonas</searchLink><relatesTo>1</relatesTo> (AUTHOR) – 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>. Sep2025, Vol. 85 Issue 9, p1-18. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Scalar+field+theory%22">Scalar field theory</searchLink><br /><searchLink fieldCode="DE" term="%22Critical+exponents%22">Critical exponents</searchLink><br /><searchLink fieldCode="DE" term="%22Critical+phenomena+%28Physics%29%22">Critical phenomena (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Dimensionless+numbers%22">Dimensionless numbers</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+theory%22">Spectral theory</searchLink><br /><searchLink fieldCode="DE" term="%22Lorentz+invariance%22">Lorentz invariance</searchLink><br /><searchLink fieldCode="DE" term="%22Density+of+states%22">Density of states</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We study real-time scalar ϕ 4 -theory in 2+1 dimensions near criticality. Specifically, we compute the single-particle spectral function and that of the s-channel four-point function in and outside the scaling regime. The computation is done with the spectral functional Callan–Symanzik equation, which exhibits manifest Lorentz invariance and preserves causality. We extract the scaling exponent η from the spectral function and compare our result with that from a Euclidean fixed point analysis. [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/s10052-025-14679-9 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Scalar field theory Type: general – SubjectFull: Critical exponents Type: general – SubjectFull: Critical phenomena (Physics) Type: general – SubjectFull: Dimensionless numbers Type: general – SubjectFull: Spectral theory Type: general – SubjectFull: Lorentz invariance Type: general – SubjectFull: Density of states Type: general Titles: – TitleFull: Critical scaling for spectral functions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kockler, Konrad – PersonEntity: Name: NameFull: Pawlowski, Jan M. – PersonEntity: Name: NameFull: Wessely, Jonas IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 14346044 Numbering: – Type: volume Value: 85 – Type: issue Value: 9 Titles: – TitleFull: European Physical Journal C -- Particles & Fields Type: main |
| ResultId | 1 |
