Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102508
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dc.contributor.authorKatanin, A. A.en
dc.date.accessioned2021-08-31T15:03:55Z-
dc.date.available2021-08-31T15:03:55Z-
dc.date.issued2013-
dc.identifier.citationKatanin A. A. The effect of six-point one-particle reducible local interactions in the dual fermion approach / A. A. Katanin. — DOI 10.1088/1751-8113/46/4/045002 // Journal of Physics A: Mathematical and Theoretical. — 2013. — Vol. 46. — Iss. 4. — 045002.en
dc.identifier.issn17518113-
dc.identifier.otherFinal2
dc.identifier.otherAll Open Access, Green3
dc.identifier.otherhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84872699893&doi=10.1088%2f1751-8113%2f46%2f4%2f045002&partnerID=40&md5=9a2532da5a200a09457320b809489bee
dc.identifier.otherhttp://arxiv.org/pdf/1209.6285m
dc.identifier.urihttp://hdl.handle.net/10995/102508-
dc.description.abstractWe formulate the dual fermion approach for strongly correlated electronic systems in terms of the lattice and dual effective interactions, obtained by using the covariation splitting formula. This allows us to consider the effect of six-point one-particle reducible interactions, which are usually neglected by the dual fermion approach. We show that the consideration of one-particle reducible six-point (as well as higher order) vertices is crucially important for the diagrammatic consistency of this approach. In particular, the relation between the dual and lattice self-energy, derived in the dual fermion approach, implicitly accounts for the effect of the diagrams, containing six-point and higher order local one-particle reducible vertices, and should be applied with caution, if these vertices are neglected. Apart from that, the treatment of the self-energy feedback is also modified by six-point and higher order vertices; these vertices are also important to account for some non-local corrections to the lattice self-energy, which have the same order in the local four-point vertices as the diagrams usually considered in the approach. These observations highlight an importance of six-point and higher order vertices in the dual fermion approach, and call for the development of new schemes of treatment of non-local fluctuations, which are based on one-particle irreducible quantities. © 2013 IOP Publishing Ltd.en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.sourceJ. Phys. Math. Theor.2
dc.sourceJournal of Physics A: Mathematical and Theoreticalen
dc.titleThe effect of six-point one-particle reducible local interactions in the dual fermion approachen
dc.typeArticleen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeinfo:eu-repo/semantics/publishedVersionen
dc.identifier.doi10.1088/1751-8113/46/4/045002-
dc.identifier.scopus84872699893-
local.contributor.employeeKatanin, A.A., Institute of Metal Physics, 620990, Ekaterinburg, Russian Federation, Ural Federal University, 620002 Ekaterinburg, Russian Federation
local.issue4-
local.volume46-
local.contributor.departmentInstitute of Metal Physics, 620990, Ekaterinburg, Russian Federation
local.contributor.departmentUral Federal University, 620002 Ekaterinburg, Russian Federation
local.identifier.pure902351-
local.identifier.puree4db8312-b574-421e-816e-a6f5a9b12744uuid
local.description.order045002-
local.identifier.eid2-s2.0-84872699893-
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