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Axion-driven cosmic magnetogenesis prior to the QCD crossover

Abstract:

We propose a mechanism for the generation of a magnetic field in the early Universe during the QCD crossover assuming that dark matter is made of axions. Thermoelectric fields arise at pressure gradients in the primordial plasma due to the difference in charge, energy density, and equation of state between the quark and lepton components. The axion field is coupled to the EM field, so when its spatial gradient is misaligned with the thermoelectric field, an electric current is driven. Because...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.121.021301

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More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
Linacre College
Role:
Author
ORCID:
0000-0002-3542-858X
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
121
Issue:
2
Article number:
021301
Publication date:
2018-07-09
Acceptance date:
2018-05-24
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Source identifiers:
824304
Keywords:
Pubs id:
pubs:824304
UUID:
uuid:3a9121ce-41b4-4aed-a89b-cc0c0aeee89a
Local pid:
pubs:824304
Deposit date:
2018-02-13

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