Time-dependent Mott transition in the periodic Anderson model with nonlocal hybridization
arXiv:1606.01089 · doi:10.1140/epjb/e2016-70350-9
Abstract
The time-dependent Mott transition in a periodic Anderson model with off-site, nearest-neighbor hybridization is studied within the framework of nonequilibrium self-energy functional theory. Using the two-site dynamical-impurity approximation, we compute the real-time dynamics of the optimal variational parameter and of different observables initiated by sudden quenches of the Hubbard-U and identify the critical interaction. The time-dependent transition is orbital selective, i.e., in the final state, reached in the long-time limit after the quench to the critical interaction, the Mott gap opens in the spectral function of the localized orbitals only. We discuss the dependence of the critical interaction and of the final-state effective temperature on the hybridization strength and point out the various similarities between the nonequilibrium and the equilibrium Mott transition. It is shown that these can also be smoothly connected to each other by increasing the duration of a U-ramp from a sudden quench to a quasi-static process. The physics found for the model with off-site hybridization is compared with the dynamical Mott transition in the single-orbital Hubbard model and with the dynamical crossover found for the real-time dynamics of the conventional Anderson lattice with on-site hybridization.
12 pages, 10 figures
References in corpus (16)
- Thermalization and its mechanism for generic isolated quantum systems
- Continuous-time Monte Carlo methods for quantum impurity models
- Interaction Quench in the Hubbard model
- Dynamical phase transition in correlated fermionic lattice systems
- Variational cluster approach to correlated electron systems in low dimensions
- Time-Dependent Mean Field Theory for Quench Dynamics in correlated electron systems
- Self-energy-functional approach: Analytical results and the Mott-Hubbard transition
- Solving nonequilibrium dynamical mean-field theory using matrix product states
- Space-time renormalization in phase transition dynamics
- Field-induced polaron formation in the Holstein-Hubbard model
- Multiconfiguration time-dependent Hartree impurity solver for nonequilibrium dynamical mean-field theory
- Dynamical Transition in Interaction Quenches of the One-Dimensional Hubbard Model
- Non-equilibrium cluster-perturbation theory
- Multiplons in the two-hole excitation spectra of the one-dimensional Hubbard model
- Lehmann representation of the nonequilibrium self-energy
- Nonequilibrium self-energy functional approach to the dynamical Mott transition