145 citations · 988 across the 37 of their papers we have counts for
36 papers
Analytical results for Green's functions of lattice fermions
A. Komnik, S. Heinze
We present a further development of methods for analytical calculations of Green's functions of lattice fermions based on recurrence relations. Applying it to tight-binding systems…
Duality relations for charge transfer statistics
A. Komnik
By a detailed study of the mathematical structure of the cumulant generating function (CGF) of particle transfer in the non-interacting case we show that it satisfies duality relat…
Topological insulator in a helicoidal magnetization field
S. Stagraczynski, L. Chotorlishvili, V. K. Dugaev +4
A key feature of topological insulators is the robustness of the electron energy spectrum. At a surface of a topological insulator, Dirac point is protected by the characteristic s…
BCS theory of driven superconductivity
A. Komnik, M. Thorwart
We study the impact of a time-dependent external driving of the lattice phonons in a minimal model of a BCS superconductor. Upon evaluating the driving-induced vertex corrections o…
Observation of the phononic Lamb shift with a synthetic vacuum
T. Rentrop, A. Trautmann, F. A. Olivares +3
The quantum vacuum fundamentally alters the properties of embedded particles. In contrast to classical empty space, it allows for creation and annihilation of excitations. For trap…
Spectral weight suppression in response functions of ultracold fermion-boson mixtures
Kai Ji, Andreas Komnik
We study the dynamical response of ultracold fermion-boson mixture in the Bogoliubov regime, where the interactions between fermionic impurities and bosonic excitations (phonons) a…