Persistent currents in one dimension: the other side of Leggett's theorem

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dc.creatorWaintal, Xavier
dc.creatorFleury, Genevieve
dc.creatorKazymyrenko, Kyryl
dc.creatorHouzet, Manuel
dc.creatorSchmitteckert, Peter
dc.creatorWeinmann, Dietmar
dc.date2008-04-10
dc.date.accessioned2026-07-07T10:00:53Z
dc.date.available2026-07-07T10:00:53Z
dc.descriptionWe discuss the sign of the persistent current of N electrons in one dimensional rings. Using a topology argument, we establish lower bounds for the free energy in the presence of arbitrary electron-electron interactions and external potentials. Those bounds are the counterparts of upper bounds derived by Leggett. Rings with odd (even) numbers of polarized electrons are always diamagnetic (paramagnetic). We show that unpolarized electrons with N being a multiple of four exhibit either paramagnetic behavior or a superconductor-like current-phase relation.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0804.1689
dc.identifierhttp://arxiv.org/abs/0804.1689
dc.identifierPhys. Rev. Lett. 101, 106804 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.106804
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168460
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titlePersistent currents in one dimension: the other side of Leggett's theorem
dc.typetext

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