In the impurity model, the natural-super-orbital occupations of both the time-evolution operator and a local operator decay exponentially with mode index, while in the t-V chain no preferred super-orbital basis emerges.
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Natural super-orbitals representation of many-body operators
In the impurity model, the natural-super-orbital occupations of both the time-evolution operator and a local operator decay exponentially with mode index, while in the t-V chain no preferred super-orbital basis emerges.