Glassy dynamics of the one-dimensional Mott insulator excited by a strong terahertz pulse

Abstract

The elucidation of nonequilibrium states in strongly correlated systems holds the key to emergence of novel quantum phases. The nonequilibrium-induced insulator-to-metal transition is particularly interesting since it reflects the fundamental nature of competition between itinerancy and localization of the charge degrees of freedom. We investigate pulse-excited insulator-to-metal transition of the half-filled one-dimensional extended Hubbard model. Calculating the time-dependent optical conductivity with the time-dependent density-matrix renormalization group, we find that strong mono- and half-cycle pulses inducing quantum tunneling strongly suppress spectral weights contributing to the Drude weight ${\sigma }_{\text{D}}$, even if we introduce a large number of carriers $\Delta n_{\text{d}}$. This is in contrast to a metallic behavior of ${\sigma }_{\text{D}}\propto \Delta n_{\text{d}}$ induced by photon absorption and chemical doping. The strong suppression of ${\sigma }_{\text{D}}$ in quantum tunneling is a result of the emergence of the Hilbert-space fragmentation, which makes pulse-excited states glassy.

8 pages, 4 figures + Supplemental Material (11 pages, 5 figures)

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Cited by in corpus (8)

• Photo-induced nonequilibrium states in Mott insulators
• Anomalous suppression of photo-induced in-gap weight in the optical conductivity of a two-leg Hubbard ladder
• Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
• Keldysh crossover in one-dimensional Mott insulators
• Controlling inversion and time-reversal symmetries by subcycle pulses in the one-dimensional extended Hubbard model
• Optical absorption activated by an ultrashort half-cycle pulse in metallic and superconducting states of the Hubbard model
• Nonclassical dynamics of Néel vector and magnetization accompanied by THz and high-harmonic radiation from ultrafast-light-driven NiO antiferromagnet insulator
• Low-energy photoexcitations inside the Mott gap in doped Hubbard and t-J ladders