The response to dynamical modulation of the optical lattice for fermions in the Hubbard model

Abstract

Fermionic atoms in a periodic optical lattice provide a realization of the single-band Hubbard model. Using Quantum Monte Carlo simulations along with the Maximum Entropy Method, we evaluate the effect of a time-dependent perturbative modulation of the optical lattice amplitude on atomic correlations, revealed in the fraction of doubly-occupied sites. Our treatment extends previous approaches which neglected the time dependence of the on-site interaction, and shows that this term changes the results in a quantitatively significant way. The effect of modulation depends strongly on the filling-- the response of the double occupation is significantly different in the half-filled Mott insulator from the doped Fermi liquid region.

4 pages, 4 figures

References in corpus (3)

• Many-Body Physics with Ultracold Gases
• Probing nearest-neighbor correlations of ultracold fermions in an optical lattice
• Dynamically Generated Double Occupancy as a Probe of Cold Atom Systems

Cited by in corpus (8)

• Probing the bond order wave phase transitions of the ionic Hubbard model by superlattice modulation spectroscopy
• Spin correlations and doublon production rate for fermionic atoms in modulated optical lattices
• Doublon production rate in modulated optical lattices
• Theoretical Description of Coherent Doublon Creation via Lattice Modulation Spectroscopy
• Dynamically induced doublon repulsion in the Fermi-Hubbard model probed by a single-particle density of states
• Thermometry of ultracold fermions by (super)lattice modulation spectroscopy
• Feshbach modulation spectroscopy
• Analysis of Particle Transfer by Periodic Lattice Modulation for Ultracold Fermionic Atom Systems in Three Dimensional Optical Lattice