A quantics tensor-train time-difference formulation with direct retarded convolutions accelerates strong-coupling impurity solvers to third order in nonequilibrium DMFT and EDMFT.
Dynamics of screening in photo-doped Mott insulators
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abstract
We use a nonequilibrium implementation of extended dynamical mean field theory to study the effect of dynamical screening in photo-excited Mott insulators. The insertion of doublons and holes adds low-energy screening modes and leads to a reduction of the Mott gap. The coupling to low-energy bosonic modes further- more opens new relaxation channels and significantly speeds up the thermalization process. We also consider the effect of the energy distribution of the doped carriers on the screening.
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Accelerating a Strong-Coupling Non-Equilibrium Steady-State Impurity Solver using (Quantics) Tensor Trains
A quantics tensor-train time-difference formulation with direct retarded convolutions accelerates strong-coupling impurity solvers to third order in nonequilibrium DMFT and EDMFT.