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Lieb–Robinson Bounds for Multi–Commutators and Applications to Response Theory
We generalize to multi-commutators the usual Lieb–Robinson bounds for commutators. In the spirit of constructive QFT, this is done so as to allow the use of combinatorics of minimally connected graphs (tree expansions) in ...
Diagonalizing quadratic bosonic operators by non-autonomous flow equations volker bach
We study a non-autonomous, non-linear evolution equation on the space of operators on a complex Hilbert space. We specify assumptions that ensure the global existence of its solutions and allow us to derive its asymptotics ...