kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Nonclassicality of axionlike dark matter through gravitational self-interactions
Nordita SU Stockholm Univ, Hannes Alfvens Vag 12, SE-10691 Stockholm, Sweden..
Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden..
Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.;Stevens Inst Technol, Dept Phys, Hoboken, NJ 07030 USA..
2022 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 106, no 4, article id 043517Article in journal (Refereed) Published
Abstract [en]

Axionlike particles (ALPs) are promising dark matter candidates. They are typically described by a classical field, motivated by large phase space occupation numbers. Here we show that such a description is accompanied by a quantum effect: squeezing due to gravitational self-interactions. For a typical QCD axion today, the onset of squeezing is reached on mu s scales and grows over millennia. Thus within the usual models based on the classical Schrodinger-Poisson equation, a type of Gross-Pitaevskii equation, any viable ALP is nonclassical. We also show that squeezing may be relevant on the scales of other self -gravitating systems such as galactic haloes, or solitonic cores. Conversely, our results highlight the incompleteness and limitations of the classical single field description of ALPs.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2022. Vol. 106, no 4, article id 043517
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-320498DOI: 10.1103/PhysRevD.106.043517ISI: 000861136200012Scopus ID: 2-s2.0-85136098867OAI: oai:DiVA.org:kth-320498DiVA, id: diva2:1705869
Note

QC 20221024

Nordita SU 

Available from: 2022-10-24 Created: 2022-10-24 Last updated: 2022-10-24Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus
In the same journal
Physical Review D: covering particles, fields, gravitation, and cosmology
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 13 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf