In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator

• URL: http://arxiv.org/abs/2205.09557v1
• Date: Thu, 19 May 2022 13:28:47 GMT
• Title: In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
• Authors: Alexander Osterkorn and Constantin Meyer and Salvatore R. Manmana
• Abstract summary: Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. We investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator.
• Score: 68.8204255655161
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. Here we investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator. Using unbiased numerical matrix product state methods for time-dependent spectral functions, we find that driving of the correlated charge-density wave insulator leads not only to a renormalization of the excitation spectrum as predicted by an effective Floquet Hamiltonian, but also to a cosine-like in-gap feature. This is not obtained for a charge density wave model without interactions. A mean-field treatment provides a partial explanation in terms of doublon excitations. However, the full picture needs to take into account strong correlation effects.

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