Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-11-04
J. Phys.: Condens. Matter 21 (2009) 485602
Physics
Condensed Matter
Strongly Correlated Electrons
J. Phys.: Condens. Matter, in press
Scientific paper
10.1088/0953-8984/21/48/485602
The one-dimensional half-filled Hubbard model is considered at zero temperature within the cellular dynamical mean-field theory (CDMFT). By the computation of the spectral gap and the energy density with various cluster and bath sizes we examine the accuracy of the CDMFT in a systematic way, which proves the accurate description of the one-dimensional systems by the CDMFT with small clusters. We also calculate the spectral weights in a full range of the momentum for various interaction strengths. The results do not only account for the spin-charge separation, but they also reproduce all the features of the Bethe ansatz dispersions, implying that the CDMFT provides an excellent description of the spectral properties of low-dimensional interacting systems.
Go Ara
Jeon Gun Sang
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