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A DMRG study of a level coupled to a 1D interacting lead
Author(s) -
Weiss Yuval,
Sade Miri,
Goldstein Moshe,
Berkovits Richard
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200562749
Subject(s) - density matrix renormalization group , jump , condensed matter physics , physics , resonance (particle physics) , charge (physics) , luttinger liquid , lead (geology) , phase (matter) , renormalization group , chemistry , quantum mechanics , quantum , geology , geomorphology
The influence of nearest neighbor interactions in a reservoir coupled to a single level dot on the width of the level is studied, using the density matrix renormalization group (DMRG) method. We find that while in the Luttinger liquid (LL) phase of the lead (i.e., for weak interactions) the interactions cause a gradual decrease of the resonance width, in the charge density wave (CDW) phase (for strong interactions) the width is zero, and a sharp jump of the dot population occurs. We explain the physical difference between both cases. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)