Imprints of Barrow-Tsallis cosmology in primordial gravitational waves
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00380513" target="_blank" >RIV/68407700:21340/24:00380513 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epjc/s10052-024-13455-5" target="_blank" >https://doi.org/10.1140/epjc/s10052-024-13455-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13455-5" target="_blank" >10.1140/epjc/s10052-024-13455-5</a>
Alternative languages
Result language
angličtina
Original language name
Imprints of Barrow-Tsallis cosmology in primordial gravitational waves
Original language description
Both the Barrow and Tsallis δ entropies are one-parameter generalizations of the black-hole entropy, with the same microcanonical functional form. The ensuing deformation is quantified by a dimensionless parameter Δ, which in the case of Barrow entropy represents the anomalous dimension caused by quantum fluctuations over the horizon surface, while in Tsallis’ case, it describes the deviation of the holographic scaling from extensivity. Here, we utilize the gravity-thermodynamics conjecture with the Barrow–Tsallis entropy to investigate the implications of the related modified Friedmann equations on the spectrum of primordial gravitational waves. We show that, with the experimental sensitivity of the next generation of gravitational wave detectors, such as the Big Bang Observer, it will be possible to discriminate deviations from the ΛCDM model up to Δ<~O(10-3). In this limit, Barrow–Tsallis entropy reduces to a logarithmic correction to holographic scaling, which is nearly universally predicted by both entanglement entropy calculations in the UV regime and by several candidate theories of quantum gravity. Hence, our considerations and results are expected to have general validity in the quantum gravity framework.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal C
ISSN
1434-6044
e-ISSN
1434-6052
Volume of the periodical
84
Issue of the periodical within the volume
10
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
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UT code for WoS article
001366812900009
EID of the result in the Scopus database
2-s2.0-85206797540