176 citations · 1.9k across the 82 of their papers we have counts for
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Magnetoplasmons bound to short-range impurities in graphene: Symmetries and optics
A. M. Fischer, R. A. Römer, A. B. Dzyubenko
We consider a graphene sheet in the presence of a strong perpendicular magnetic field with a single short-range delta-impurity situated at one of the carbon sites. We study the neu…
A supersymmetric U_{q}[osp(2|2)]-extended Hubbard model with boundary fields
X. -W. Guan, A. Foerster, U. Grimm +2
A strongly correlated electron system associated with the quantum superalgebra is studied in the framework of the quantum inverse scattering method. By solving…
Hellmann-Feynman theorem and fluctuation-correlation analysis of the Calogero-Sutherland model
Rudolf A. Roemer, Paul Ziesche
Exploiting the results of the exact solution for the ground state of the one-dimensional spinless quantum gas of Fermions and impenetrable Bosons with the mu/x_{ij}^2 particle-part…
The Aharonov-Bohm effect for an exciton
R. A. Roemer, M. E. Raikh
We study theoretically the exciton absorption on a ring shreded by a magnetic flux. For the case when the attraction between electron and hole is short-ranged we get an exact solut…
Lax pair formulation for a small-polaron chain with integrable boundaries
Xi-Wen Guan, Uwe Grimm, Rudolf A. Roemer
Using a fermionic version of the Lax pair formulation, we construct an integrable small-polaron model with general open boundary conditions. The Lax pair and the boundary supermatr…
Scaling the localisation lengths for two interacting particles in one-dimensional random potentials
Rudolf A. Roemer, Mark Leadbeater, Michael Schreiber
Using a numerical decimation method, we compute the localisation length for two onsite interacting particles (TIP) in a one-dimensional random potential. We show that an in…
The Mott-Anderson transition in the disordered one-dimensional Hubbard model
Ramesh V. Pai, Alexander Punnoose, Rudolf A. Römer
We use the density matrix renormalization group to study the quantum transitions that occur in the half-filled one-dimensional fermionic Hubbard model with onsite potential disorde…