Ground-state properties of the one-dimensional attractive Hubbard model with confinement: A comparative study
Ground-state properties of the one-dimensional attractive Hubbard model with confinement: A comparative study
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带约束的一维吸引哈伯德模型的基态特性:比较研究
DOI:
10.1103/physrevb.82.014202
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发表时间:
2010-07
期刊:
影响因子:
--
通讯作者:
Machida Masahiko
中科院分区:
文献类型:
--
作者:
Hu Ji-Hong;Wang Jing-Jing;Gao Xianlong;Okumura Masahiko;Igarashi Ryo;Yamada Susumu;Machida Masahiko
We revisit the one-dimensional attractive Hubbard model by using the Bethe-ansatz-based density-functional theory and density-matrix renormalization method. The ground-state properties of this model are discussed in details for different fillings and different confining conditions in weak-to-intermediate coupling regime. We investigate the ground-state energy, energy gap, and pair-binding energy and compare them with those calculated from the canonical Bardeen-Cooper-Schrieffer approximation. We find that the Bethe-ansatz-based density-functional theory is computationally easy and yields an accurate description of the ground-state properties for weak-to-intermediate interaction strength, different fillings, and confinements. In order to characterize the quantum phase transition in the presence of a harmonic confinement, we calculate the thermodynamic stiffness, the density-functional fidelity, and fidelity susceptibility, respectively. It is shown that with the increase in the number of particles or attractive interaction strength, the system can be driven from the Luther-Emery-type phase to the composite phase of Luther-Emery-type in the wings and insulatinglike in the center.
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影响因子:
3
作者:
FESHBACH, H
通讯作者:
FESHBACH, H
影响因子:
2.9
作者:
Bin Wang;Han-dong Chen;S. D. Sarma
通讯作者:
Bin Wang;Han-dong Chen;S. D. Sarma
影响因子:
8.6
作者:
Gao Xianlong;M. Rizzi;M. Polini;R. Fazio;M. Tosi;V. L. Campo;K. Capelle
通讯作者:
Gao Xianlong;M. Rizzi;M. Polini;R. Fazio;M. Tosi;V. L. Campo;K. Capelle
影响因子:
2.4
作者:
Zanardi, Paolo;Paunkovic, Nikola
通讯作者:
Paunkovic, Nikola
DOI:
10.1103/physrevb.78.085108
发表时间:
2008-03
期刊:
Phys. Rev. B
影响因子:
--
作者:
高先龙
通讯作者:
高先龙