Non-equilibrium dynamics in the antiferromagnetic Hubbard model

Abstract

We investigate by means of the time-dependent Gutzwiller approximation the out-of-equilibrium dynamics of an antiferromagnetic state evolved with the Hubbard model Hamiltonian after a sudden change of the repulsion strength $U$. We find that magnetic order survives more than what expected on the basis of thermalization arguments, in agreement with recent DMFT calculations. In addition, we find evidence of a dynamical transition for quenches to large values of $U$ between a coherent antiferromagnet characterized by a finite quasiparticle residue to an incoherent one with vanishing residue, that finally turns into a paramagnet for even larger $U$.

References in corpus (8)

• Many-Body Physics with Ultracold Gases
• Time-Dependent Mean Field Theory for Quench Dynamics in correlated electron systems
• Nonthermal antiferromagnetic order and nonequilibrium criticality in the Hubbard model
• Nonthermal symmetry broken states in the strongly interacting Hubbard model
• Linear Ramps of Interaction in the Fermionic Hubbard Model
• Dynamical quantum phase transitions and broken-symmetry edges in the many-body eigenvalue spectrum
• Dynamical Transition in Interaction Quenches of the One-Dimensional Hubbard Model
• Finite-temperature Gutzwiller approximation and the phase diagram of a toy-model for V2O3

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