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A strong astrophysical constraint on the violation of special relativity by quantum gravity
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Special relativity asserts that physical phenomena appear the same to all unaccelerated observers. This is called Lorentz symmetry and relates long wavelengths to short ones: if the symmetry is exact it implies that space-time must look the same at all length scales. Several approaches to quantum gravity, however, suggest that there may be a microscopic structure of space-time that leads to a violation of Lorentz symmetry. This might arise because of the discreteness or non-commutivity of space-time, or through the action of extra dimensions. Here we determine a very strong constraint on a type of Lorentz violation that produces a maximum electron speed less than the speed of light. We use the observation of 100-MeV synchrotron radiation from the Crab nebula to improve the previous limit by a factor of 40 million, ruling out this type of Lorentz violation, and thereby providing an important constraint on theories of quantum gravity.
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“Jacobson et al. [153] noticed that the synchrotron emission from the Crab nebula (and other astrophysical objects) is very sensitive to n = 3 modified dispersion relations.”
From Modern Tests of Lorentz Invariance (2005) · cites this paper as [153]
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Metadata
- Authors
- Jacobson, T., Liberati, S., & Mattingly, D.
- Affiliations
- University of Maryland, College Park (US)
- Venue
- Nature
- Published
- 2003-08
- Volume
- 424
- Issue
- 6952
- Pages
- 1019-1021
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2055012568
- Cited by
- 277
- References
- 32
- Citations by year
- 2026: 4 · 2025: 11 · 2024: 4 · 2023: 8 · 2022: 9 · 2021: 8 · 2020: 11 · 2019: 7 · 2018: 5 · 2017: 7 · 2016: 3 · 2015: 8 · 2014: 7 · 2013: 12 · 2012: 14
- FWCI
- 17.32
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- SDL (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Noncommutative and Quantum Gravity Theories
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Relativity and Gravitational Theory
- Keywords
- Lorentz violation, quantum gravity, special relativity, synchrotron radiation, Crab Nebula, noncommutative spacetime, extra dimensions, astrophysical constraints
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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