Compensating strong coupling with large charge

Alvarez-Gaume, Luis; Loukas, Orestis; Orlando, Domenico; Reffert, Susanne (2017). Compensating strong coupling with large charge. Journal of High Energy Physics, 2017(4), 059. Springer 10.1007/JHEP04(2017)059

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We study some (conformal) field theories with global symmetries in the sector where the value of the global charge Q is large. We find (as expected) that the low energy excitations of this sector are described by the general form of Goldstone’s theorem in the non-relativistic regime. We also derive the unexpected result, first presented in [1], that the effective field theory describing such sector of fixed Q contains effective couplings λeff ∼ λb/Qa, where λ is the original coupling. Hence, large charge leads to weak coupling. In the last section of the paper we present an outline of how to compute anomalous dimensions of the O(n) model in this limit.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Loukas, Orestis; Orlando, Domenico and Reffert, Susanne

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Oct 2017 08:00

Last Modified:

30 Oct 2017 08:00

Publisher DOI:

10.1007/JHEP04(2017)059

ArXiv ID:

1610.04495

BORIS DOI:

10.7892/boris.102357

URI:

https://boris.unibe.ch/id/eprint/102357

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