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Physical review B
We study the nonequilibrium response of a 4 × 3 Hubbard model at U = 8 under the influence of a short electric field pulse, with the main focus on multiple photon excitations and on the change of double occupancy after the pulse. The behavior mainly depends on the driving frequency of the electric field. The largest change of double occupancy occurs during the pulse. For frequencies below the Mott gap, we observe multiphoton excitations at large field intensities. For frequencies beyond the gapdoi:10.1103/physrevb.105.045114 fatcat:zmch4edorjdbbktfrrjkszmvwu