TY - JOUR
T1 - Superconductivity and charge density wave under a time-dependent periodic field in the one-dimensional attractive Hubbard model
AU - Fujiuchi, Ryo
AU - Kaneko, Tatsuya
AU - Sugimoto, Koudai
AU - Yunoki, Seiji
AU - Yunoki, Seiji
AU - Yunoki, Seiji
AU - Ohta, Yukinori
N1 - Funding Information:
The authors acknowledge H. Aoki, S. Miyakoshi, Y. Murakami, K. Seki, and T. Shirakawa for fruitful discussion. This work was supported in part by Grants-in-Aid for Scientific Research from JSPS (Projects No. JP17K05530, No. JP18H01183, No. JP18K13509, No. JP19J20768, No. JP19K14644, and No. JP20H01849) of Japan and Keio University Academic Development Funds for Individual Research. R.F. acknowledges support from the JSPS Research Fellowship for Young Scientists. T.K. was supported by the JSPS Overseas Research Fellowship.
Publisher Copyright:
© 2020 American Physical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevB.101.235122
DO - 10.1103/PhysRevB.101.235122
M3 - Article
AN - SCOPUS:85086991555
VL - 101
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 23
M1 - 235122
ER -