In: IMA Journal of Numerical Analysis, 2017, vol. 37, no. 3, p. 1087-1103
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In: Physical Review Letters, 2019, vol. 123, no. 19, p. 193602
We perform an ab initio comparison between nonequilibrium dynamical mean-field theory and optical lattice experiments by studying the time evolution of double occupations in the periodically driven Fermi-Hubbard model. For off-resonant driving, the range of validity of a description in terms of an effective static Hamiltonian is determined and its breakdown due to energy absorption close to...
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In: Physical Review B, 2019, vol. 99, no. 15, p. 155107
We investigate the excited state electronic structure of the model phase transition system In/Si(111) using femtosecond time- and angle-resolved photoemission spectroscopy (trARPES). An extreme ultraviolet 500 kHz laser source at 21.7 eV is utilized both to map the energy of excited states above the Fermi level and follow the momentum-resolved population dynamics on a femtosecond timescale....
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In: EPL (Europhysics Letters), 2018, vol. 124, no. 5, p. 57002
Spin-freezing is the origin of bad-metal physics and non-Fermi liquid (non-FL) properties in a broad range of correlated compounds. In a multi-orbital lattice system with Hund coupling, doping of the half-filled Mott insulator results in a highly incoherent metal with frozen magnetic moments. These moments fluctuate and collapse in a crossover region that is characterized by unusual non-Fermi...
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In: The European Physical Journal Special Topics, 2013, vol. 217, no. 1, p. 121-133
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In: Journal of Scientific Computing, 2005, vol. 25, no. 1, p. 67-81
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In: Journal of Statistical Physics, 2013, vol. 150, no. 4, p. 609-657
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In: Foundations of Computational Mathematics, 2008, vol. 8, no. 3, p. 319-334
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In: BIT Numerical Mathematics, 2005, vol. 45, no. 2, p. 287-305
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In: Foundations of Computational Mathematics, 2010, vol. 10, no. 4, p. 407-427
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