In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
arXiv:2205.09557 · doi:10.1038/s42005-023-01346-2
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.
References in corpus (20)
- Many-Body Physics with Ultracold Gases
- The density-matrix renormalization group in the age of matrix product states
- Topological characterization of periodically-driven quantum systems
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
- Equilibrium states of generic quantum systems subject to periodic driving
- Nonthermal pathways to ultrafast control in quantum materials
- QuSpin: a Python Package for Dynamics and Exact Diagonalisation of Quantum Many Body Systems part I: spin chains
- Spectral function of spinless fermions on a one-dimensional lattice
- On the survival of Floquet-Bloch states in the presence of scattering
- Spin pumping and measurement of spin currents in optical superlattices
- Floquet analysis of a quantum system with modulated periodic driving
- Effective Floquet Hamiltonian in the low-frequency regime
- Theoretical description of time-resolved pump/probe photoemission in TaS\_2: a single-band DFT+DMFT(NRG) study within the quasiequilibrium approximation
- Photo-enhanced excitonic correlations in a Mott insulator with nonlocal interactions
- Photoinduced metallization of excitonic insulators
- Flow-equation approach to quantum systems driven by an amplitude-modulated time-periodic force
- Photoinduced prethermal order parameter dynamics in the two-dimensional large- Hubbard-Heisenberg model
- Symmetry-protected Bose-Einstein condensation of interacting hardcore Bosons
- A New Era of Quantum Materials Mastery and Quantum Simulators In and Out of Equilibrium