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Spectra of correlators in the relaxation time approximation of kinetic theory
ID
Bajec, Matej
(
Author
),
ID
Grozdanov, Sašo
(
Author
),
ID
Soloviev, Alexander
(
Author
)
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MD5: 6B114ED25BA8DCCEDBCEEB2ECCDE4529
URL - Source URL, Visit
https://link.springer.com/article/10.1007/JHEP08(2024)065
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Abstract
The relaxation time approximation (RTA) of the kinetic Boltzmann equation is likely the simplest window into the microscopic properties of collective real-time transport. Within this framework, we analytically compute all retarded two-point Green’s functions of the energy-momentum tensor and a conserved U(1) current in thermal states with classical massless particles (a ‘CFT’) at non-zero density, and in the absence and presence of broken translational symmetry. This is done in 2 + 1 and 3 + 1 dimensions. RTA allows a full explicit analysis of the analytic structure of different correlators (poles versus branch cuts) and the transport properties that they imply (the thermoelectric conductivities, and the hydrodynamic, quasihydrodynamic and gapped mode dispersion relations). Our inherently weakly coupled analysis thereby also enables a direct comparison with previously known strongly coupled results in holographic CFTs dual to the Einstein-Maxwell-axion theories.
Language:
English
Keywords:
thermal field theory
,
field theory
,
hydrodynamics
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FMF - Faculty of Mathematics and Physics
Publication version:
Version of Record
Publication date:
08.08.2024
Year:
2024
Number of pages:
38 str.
Numbering:
Vol. 2024, art. no. 65
PID:
20.500.12556/RUL-160051
UDC:
53
ISSN on article:
1029-8479
DOI:
10.1007/JHEP08(2024)065
COBISS.SI-ID:
204172035
Publication date in RUL:
12.08.2024
Views:
108
Downloads:
31
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Record is a part of a journal
Title:
The journal of high energy physics
Shortened title:
J. high energy phys.
Publisher:
SISSA
ISSN:
1029-8479
COBISS.SI-ID:
1314148
Licences
License:
CC BY 4.0, Creative Commons Attribution 4.0 International
Link:
http://creativecommons.org/licenses/by/4.0/
Description:
This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Projects
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
N1-0245
Name:
Kvantni kaos v relativističnih plazmah
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
P1-0035
Name:
Teorija jedra, osnovnih delcev in polj
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
P1-0402
Name:
Matematična fizika
Funder:
EC - European Commission
Funding programme:
HE
Project number:
101103006
Name:
Far-from-Equilibrium ATtractors at Ultra-Relativistic Energies
Acronym:
FEATURE
Funder:
Other - Other funder or multiple funders
Name:
STFC Ernest Rutherford Fellowship ST/T00388X/1
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