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Ferromagnetic transition of a two-component Fermi gas of hard spheres
dc.contributor.author | Arias de Saavedra, F. |
dc.contributor.author | Mazzanti Castrillejo, Fernando Pablo |
dc.contributor.author | Boronat Medico, Jordi |
dc.contributor.author | Polls, A. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear |
dc.date.accessioned | 2012-09-04T15:03:23Z |
dc.date.available | 2012-09-04T15:03:23Z |
dc.date.created | 2012-03-12 |
dc.date.issued | 2012-03-12 |
dc.identifier.citation | Arias , F. [et al.]. Ferromagnetic transition of a two-component Fermi gas of hard spheres. "Physical review A", 12 Març 2012, vol. 85, núm. 3, p. 1-6. |
dc.identifier.issn | 1050-2947 |
dc.identifier.uri | http://hdl.handle.net/2117/16422 |
dc.description.abstract | We use microscopic many-body theory to analyze the problem of itinerant ferromagnetism in a repulsive atomic Fermi gas of hard spheres. Using simple arguments we show that the available theoretical predictions for the onset of the ferromagnetic transition predict a transition point at a density (kF a ∼ 1) that is too large to be compatible with the universal low-density expansion of the energy. We present variational calculations for the hard-sphere Fermi gas, in the framework of Fermi hypernetted chain theory, that shift the transition to higher densities (kF a ∼ 1.8). Backflow correlations, which are mainly active in the unpolarized system, are essential for this shift. |
dc.format.extent | 6 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject.lcsh | Ferromagnetism |
dc.subject.lcsh | Electron gas |
dc.subject.other | GROUND-STATE |
dc.subject.other | LIQUID-HE-3 |
dc.subject.other | HELIUM |
dc.subject.other | ENERGY |
dc.title | Ferromagnetic transition of a two-component Fermi gas of hard spheres |
dc.type | Article |
dc.subject.lemac | Ferromagnetisme |
dc.subject.lemac | Electrons--Distribució |
dc.contributor.group | Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity |
dc.identifier.doi | 10.1103/PhysRevA.85.033615 |
dc.relation.publisherversion | http://pra.aps.org/abstract/PRA/v85/i3/e033615 |
dc.rights.access | Open Access |
local.identifier.drac | 10215402 |
dc.description.version | Postprint (published version) |
local.citation.author | Arias , F.; Mazzanti, F.; Boronat, J.; Polls, A. |
local.citation.publicationName | Physical review A |
local.citation.volume | 85 |
local.citation.number | 3 |
local.citation.startingPage | 1 |
local.citation.endingPage | 6 |
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