fTDHF is a mean-field dynamics method for spin systems that is formally exact for free fermions and reproduces qualitative features of exact evolution in benchmarks for adiabatic preparation, many-body localization, and the Schwinger model.
We may also encounter cases where det(S)≈0, which can lead to numerical issues in Eq
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Fermionic mean-field dynamics for spin systems beyond free fermions
fTDHF is a mean-field dynamics method for spin systems that is formally exact for free fermions and reproduces qualitative features of exact evolution in benchmarks for adiabatic preparation, many-body localization, and the Schwinger model.