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4 papers
Predictor-corrector method based on dynamic mode decomposition for tensor-train nonequilibrium Green's function calculations
Maksymilian Środa, Ken Inayoshi, Michael Schüler +2
The nonequilibrium Green's function (NEGF) formalism is a powerful tool to study the nonequilibrium dynamics of correlated lattice systems, but its applicability to realistic syste…
Tensor cross interpolation approach for quantum impurity problems based on the weak-coupling expansion
Shuta Matsuura, Hiroshi Shinaoka, Philipp Werner +1
We apply the tensor cross interpolation (TCI) algorithm to solve equilibrium quantum impurity problems with high precision based on the weak-coupling expansion. The TCI algorithm,…
Memory-Efficient Nonequilibrium Green's Function Framework Built On Quantics Tensor Trains
Maksymilian Środa, Ken Inayoshi, Hiroshi Shinaoka +1
One of the challenges in diagrammatic simulations of nonequilibrium phenomena in lattice models is the large memory demand for storing momentum-dependent two-time correlation funct…
Strong coupling impurity solver based on quantics tensor cross interpolation
Aaram J. Kim, Philipp Werner
Numerical methods capable of handling nonequilibrium impurity models are essential for the study of transport problems and the solution of the nonequilibrium dynamical mean field t…