Superconductivity and charge density wave under a time-dependent periodic field in the one-dimensional attractive Hubbard model
Superconductivity and charge density wave under a time-dependent periodic field in the one-dimensional attractive Hubbard model
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一维吸引力哈伯德模型中随时间变化的周期场下的超导和电荷密度波
DOI：
10.1103/physrevb.101.235122
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发表时间：
2020
影响因子：
3.7
通讯作者：
Ohta Yukinori
中科院分区：
文献类型：
--
作者：
Fujiuchi Ryo;Kaneko Tatsuya;Sugimoto Koudai;Yunoki Seiji;Ohta Yukinori
研究了在含时周期场中Hubbard模型中超导性与电荷密度波之间的竞争。利用含时精确对角化方法，我们证明了外场的驱动频率和振幅可以控制系统中超导对或CDW关联的增强，在没有外场的情况下，超导对和CDW在半满吸引Hubbard模型的基态是简并的.在Hubbard吸引相互作用的强耦合极限下，能控性由有效模型的各向异性相互作用来表征。外场诱导的各向异性提高了SC和CDW的简并度。我们发现，在强耦合极限下导出的有效模型的失超动力学可以很好地解释周期性驱动吸引Hubbard模型中超导对和CDW关联的增强或抑制.
We investigate the competition between superconductivity (SC) and charge density wave (CDW) under a time-dependent periodic field in the attractive Hubbard model. By employing the time-dependent exact diagonalization method, we show that the driving frequency and amplitude of the external field can control the enhancement of either the superconducting pair or the CDW correlation in the system, for which SC and CDW are degenerate in the ground state of the half-filled attractive Hubbard model in the absence of the field. In the strong-coupling limit of the attractive Hubbard interaction, the controllability is characterized by the anisotropic interaction of the effective model. The anisotropy is induced by the external field and lifts the degeneracy of SC and CDW. We find that the enhancement or suppression of the superconducting pair and CDW correlations in the periodically driven attractive Hubbard model can be well interpreted by the quench dynamics of the effective model derived in the strong-coupling limit.
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有吸引力的荷斯坦和哈伯德模型的强耦合扩展。
DOI：
10.1103/physrevb.48.3881
发表时间：
1993
期刊：
Physical Review B (Condensed Matter)
影响因子：
--
作者：
Freericks
通讯作者：
Freericks
影响因子：
64.8
作者：
Mitrano M;Cantaluppi A;Nicoletti D;Kaiser S;Perucchi A;Lupi S;Di Pietro P;Pontiroli D;Riccò M;Clark SR;Jaksch D;Cavalleri A
通讯作者：
Cavalleri A
影响因子：
3.7
作者：
M. A. Sentef;A. F. Kemper;A. Georges;C. Kollath
通讯作者：
C. Kollath
影响因子：
8.6
作者：
M. A. Sentef;A. Tokuno;A. Georges;C. Kollath
通讯作者：
C. Kollath
影响因子：
3.7
作者：
EMERY, VJ
通讯作者：
EMERY, VJ