期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 21, 期 48, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/48/485602
关键词
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资金
- Korean Government (MOEHRD, Basic Research Promotion Fund) [KRF-2007-314-C00075]
- National Research Foundation of Korea [과06A1102] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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