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dc.contributor.author
Liam Fitzpatrick, Andrew
dc.contributor.author
Torroba, Gonzalo
dc.contributor.author
Wang, Huajia
dc.date.available
2018-05-24T15:12:33Z
dc.date.issued
2015-05-15
dc.identifier.citation
Liam Fitzpatrick, Andrew; Torroba, Gonzalo; Wang, Huajia; Aspects of renormalization in finite-density field theory; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 91; 19; 15-5-2015; 1-16
dc.identifier.issn
1098-0121
dc.identifier.uri
http://hdl.handle.net/11336/46061
dc.description.abstract
We study the renormalization of the Fermi surface coupled to a massless boson near three spatial dimensions. For this, we set up a Wilsonian RG with independent decimation procedures for bosons and fermions, where the four-fermion interaction “Landau parameters” run already at tree level. Our explicit one-loop analysis resolves previously found obstacles in the renormalization of finite-density field theory, including logarithmic divergences in nonlocal interactions and the appearance of multilogarithms. The key aspects of the RG are the above tree-level running, and a UV-IR mixing between virtual bosons and fermions at the quantum level, which is responsible for the renormalization of the Fermi velocity. We apply this approach to the renormalization of 2kF singularities, and to Fermi surface instabilities in a companion paper, showing how multilogarithms are properly renormalized. We end with some comments on the renormalization of finite-density field theory with the inclusion of Landau damping of the boson.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Strongly Correlated Electrons
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Heavy Fermions
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Finite Density
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Aspects of renormalization in finite-density field theory
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-21T17:21:58Z
dc.journal.volume
91
dc.journal.number
19
dc.journal.pagination
1-16
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Liam Fitzpatrick, Andrew. University of Stanford; Estados Unidos. SLAC National Accelerator Laboratory; Estados Unidos
dc.description.fil
Fil: Torroba, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Wang, Huajia. University of Stanford; Estados Unidos
dc.journal.title
Physical Review B: Condensed Matter and Materials Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.195135
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.91.195135
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1410.6811
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