176 citations · 1.9k across the 82 of their papers we have counts for
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Absence of backscattering at integrable impurities in one-dimensional quantum many-body systems
A. Punnoose, H. -P. Eckle, R. A. Römer
We study interacting one dimensional (1D) quantum lattice gases with integrable impurities. These model Hamiltonians can be derived using the quantum inverse scattering method for…
Conservation laws in the continuum systems
Rudolf A. Römer, B. Sriram Shastry, B. Sutherland
We study the conservation laws of both the classical and the quantum mechanical continuum type systems. For the classical case, we introduce new integrals of motion along t…
Enhanced Charge and Spin Currents in the One-Dimensional Disordered Mesoscopic Hubbard Ring
Rudolf A. Römer, Alexander Punnoose
We consider a one-dimensional mesoscopic Hubbard ring with and without disorder and compute charge and spin stiffness as a measure of the permanent currents. For finite disorder we…
GAPS IN THE HEISENBERG-ISING MODEL
R. A. Roemer, H. -P. Eckle, B. Sutherland
We report on the closing of gaps in the ground state of the critical Heisenberg-Ising chain at momentum . For half-filling, the gap closes at special values of the anisotropy $Δ…