Instabilities in One-Dimensional Two-Component Atomic Fermi Gas with Two-Level Impurities

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dc.creatorManakova, L. A.
dc.date2005-11-03
dc.date.accessioned2026-07-07T06:45:49Z
dc.date.available2026-07-07T06:45:49Z
dc.descriptionIn the present paper one-dimensional two-component atomic Fermi gas is considered in long-wave limit as a Luttinger liquid. The mechanisms leading to instability of the non-Fermi-liquid state of a Luttinger liquid with two-level impurities are proposed. Since exchange scattering in 1D systems is two-channel scattering in a certain range of parameters, several types of non-Fermi-liquid excitations with different quantum numbers exist in the vicinity of the Fermi level. These excitations include, first, charge density fluctuations in the Luttinger liquid and, second, many-particle excitations due to two-channel exchange interaction, which are associated with band-type as well as impurity fermion states. It is shown that mutual scattering of many-particle excitations of various types leads to the emergence of an additional Fermi-liquid singularity in the vicinity of the Fermi level. The conditions under which the Fermi-liquid state with a new energy scale (which is much smaller than the Kondo temperature) is the ground state of the system are formulated.
dc.description13 pages, revtex4
dc.identifierhttps://arxiv.org/abs/cond-mat/0511074
dc.identifierhttp://arxiv.org/abs/cond-mat/0511074
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/103152
dc.subjectOther Condensed Matter
dc.titleInstabilities in One-Dimensional Two-Component Atomic Fermi Gas with Two-Level Impurities
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