Magnetic impurity in a one-dimensional few-fermion system

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dc.citation.issue1
dc.citation.volume14
dc.contributor.authorRammelmüller L
dc.contributor.authorHuber D
dc.contributor.authorČufar M
dc.contributor.authorBrand J
dc.contributor.authorHammer H-W
dc.contributor.authorVolosniev AG
dc.date.accessioned2024-08-05T00:58:25Z
dc.date.available2024-08-05T00:58:25Z
dc.date.issued2023-01-24
dc.description.abstractWe present a numerical analysis of spin- ½ fermions in a one-dimensional harmonic potential in the presence of a magnetic point-like impurity at the center of the trap. The model represents a few-body analogue of a magnetic impurity in the vicinity of an swave superconductor. Already for a few particles we find a ground-state level crossing between sectors with different fermion parities. We interpret this crossing as a few-body precursor of a quantum phase transition, which occurs when the impurity “breaks” a Cooper pair. This picture is further corroborated by analyzing density-density correlations in momentum space. Finally, we discuss how the system may be realized with existing cold-atoms platforms.
dc.description.confidentialfalse
dc.identifier.citationRammelmüller L, Huber D, Čufar M, Brand J, Hammer HW, Volosniev AG. (2023). Magnetic impurity in a one-dimensional few-fermion system. SciPost Physics. 14. 1.
dc.identifier.doi10.21468/SciPostPhys.14.1.006
dc.identifier.eissn2542-4653
dc.identifier.elements-typejournal-article
dc.identifier.number006
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71189
dc.languageEnglish
dc.publisherSciPost Foundation
dc.publisher.urihttps://scipost.org/10.21468/SciPostPhys.14.1.006
dc.relation.isPartOfSciPost Physics
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleMagnetic impurity in a one-dimensional few-fermion system
dc.typeJournal article
pubs.elements-id461658
pubs.organisational-groupCollege of Health
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