Dual fermion dynamical cluster approach for strongly correlated systems.
In: Physical Review B: Condensed Matter & Materials Physics, Jg. 84 (2011-10-15), Heft 15, S. 155106-1- (8S.)
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Zugriff:
We have designed a multiscale approach for strongly correlated systems by combining the dynamical cluster approximation (DCA) and the recently introduced dual fermion formalism. This approach employs an exact mapping from a real lattice to a DCA cluster of linear size Lc embedded in a dual fermion lattice. Short-length- scale physics is addressed by the DCA cluster calculation, while longer-length-scale physics is addressed diagrammatically using dual fermions. The bare and dressed dual fermionic Green functions scale as O(1/Lc), so perturbation theory on the dual lattice converges very quickly, e.g., the dual Fermion self-energy calculated with simple second-order perturbation theory is of order Due to image rights restrictions, multiple line equation(s) cannot be graphically displayed with third-order and three-body corrections down by an additional factor of O(1/Lc). [ABSTRACT FROM AUTHOR]
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Dual fermion dynamical cluster approach for strongly correlated systems.
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Autor/in / Beteiligte Person: | Yang, S. X. ; Fotso, H. ; Hafermann, H. ; Tam, K. M. ; Moreno, J. ; Pruschke, T. ; Jarrell, M. |
Zeitschrift: | Physical Review B: Condensed Matter & Materials Physics, Jg. 84 (2011-10-15), Heft 15, S. 155106-1- (8S.) |
Veröffentlichung: | 2011 |
Medientyp: | academicJournal |
ISSN: | 1098-0121 (print) |
DOI: | 10.1103/PhysRevB.84.155106 |
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