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arXiv · 2403.03108

Charge-order melting in the one-dimensional Edwards model

Florian Lange·Gerhard Wellein·Holger Fehske
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Abstract

We use infinite matrix-product-state techniques to study the time evolution of the charge-density-wave (CDW) order after a quench or a light pulse in a fundamental fermion-boson model. The motion of fermions in the model is linked to the creation of bosonic excitations, which counteracts the melting of the CDW order. For low-energy quenches corresponding to a change of the boson relaxation rate, we find behavior similar to that in an effective $t$-$V$ model. When the boson energy is quenched instead or a light pulse is applied to the system, the transient dynamics are more complex, with the CDW order first quickly decreasing to an intermediate value while the density-wave-like order of the bosons rises. In the case of pulse irradiation, the subsequent time-evolution of the CDW order depends strongly on the photon frequency. For frequencies slightly below the boson energy, we observe a temporary increase of the CDW order parameter. Our results reveal the complex physics of driven Mott insulators in low-dimensional systems with strong correlations.

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Florian Lange, Gerhard Wellein, Holger Fehske. 2024-03-05. Charge-order melting in the one-dimensional Edwards model. https://doi.org/10.1103/physrevresearch.6.l022007

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