Favrod, Samuel Clément; Orlando, Domenico; Reffert, Susanne (2018). The large-charge expansion for Schrödinger systems. Journal of High Energy Physics, 2018(12), p. 52. Springer 10.1007/JHEP12(2018)052
|
Text
Favrod2018_Article_TheLarge-chargeExpansionForSch.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (338kB) | Preview |
In this note, we perform the large-charge expansion for non-relativistic systems with a global U(1) symmetry in 3 + 1 and 2 + 1 space-time dimensions, motivated by applications to the unitary Fermi gas and anyons. These systems do not have full conformal invariance, but are invariant under the Schrödinger group. Also here, the low-energy physics is encoded by a Goldstone boson which is due to the breaking of the global symmetry when fixing the charge. We find that in 2 + 1 dimensions and higher, there is a large-charge expansion in which quantum corrections are suppressed with respect to the next-to-leading order terms in the Lagrangian. We give the next-to-leading-order expressions for the ground state energy and the speed of sound.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Favrod, Samuel Clément, Orlando, Domenico, Reffert, Susanne |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
25 Feb 2019 12:05 |
Last Modified: |
05 Dec 2022 15:24 |
Publisher DOI: |
10.1007/JHEP12(2018)052 |
ArXiv ID: |
1809.06371 |
BORIS DOI: |
10.7892/boris.123750 |
URI: |
https://boris.unibe.ch/id/eprint/123750 |
Actions (login required)
 |
Edit item |