A quantics tensor-train time-difference formulation with direct retarded convolutions accelerates strong-coupling impurity solvers to third order in nonequilibrium DMFT and EDMFT.
In a steady state,CAB(t,t′)depends only on time difference
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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.