221 citations · 439 across the 29 of their papers we have counts for
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Continuous Renormalization Group Analysis of Spectral Problems in Quantum Field Theory
Volker Bach, Miguel Ballesteros, Jürg Fröhlich
The isospectral renormalization group is a powerful method to analyze the spectrum of operators in quantum field theory. It was introduced in 1995 [see \cite{BachFrohlichSigal1995}…
Representability Conditions by Grassmann Integration
Volker Bach, Hans Konrad Knörr, Edmund Menge
Representability conditions on the one- and two-particle density matrix for fermion systems are formulated by means of Grassmann integrals. A positivity condition for a certain kin…
Generalized One-Particle Density Matrices and Quasifree States
Volker Bach, Sébastien Breteaux, Hans Konrad Knörr +1
In the spirit of the generalized one-particle density matrix for fermions, we introduce generalized one- and two-particle density matrices to state representability conditions up t…
Existence and Construction of Resonances for Atoms Coupled to the Quantized Radiation Field
Volker Bach, Miguel Ballesteros, Alessandro Pizzo
For a nonrelativistic atom, which is minimally coupled to the quantized radiation field, resonances emerging from excited atomic eigenstates are constructed by an iteration scheme…
Minimization of the Energy of the Non-Relativistic One-Electron Pauli-Fierz Model over Quasifree States
Volker Bach, Sébastien Breteaux, Timmy Tzaneteas
In this article is proved the existence and uniqueness of a minimizer of the energy for the non-relativistic one electron Pauli-Fierz model, within the class of pure quasifree stat…