78 citations · 189 across the 9 of their papers we have counts for
9 papers
Projector-based renormalization method (PRM) and its application to many-particle systems
A. Hübsch, S. Sykora, K. W. Becker
Despite the advances in the development of numerical methods analytical approaches play a key role on the way towards a deeper understanding of strongly interacting systems. In thi…
Optical conductivity of wet DNA
A. Huebsch, R. G. Endres, D. L. Cox +1
Motivated by recent experiments we have studied the optical conductivity of DNA in its natural environment containing water molecules and counter ions. Our density functional theor…
Renormalization of the electron-phonon interaction: a reformulation of the BCS-gap equation
A. Huebsch, K. W. Becker
A recently developed renormalization approach is used to study the electron-phonon coupling in many-electron systems. By starting from an Hamiltonian which includes a small gauge s…
Charge excitations in LiVO and NaVO: similarities and differences
A. Huebsch, C. Waidacher, K. W. Becker
We calculate the optical conductivity of LiVO and NaVO using exact numerical diagonalization of a quarter-filled extended Hubbard model on a system of coupl…
Charge excitations in NaVO
A. Huebsch, C. Waidacher, K. W. Becker +1
We calculate the electron-energy loss spectrum and the optical conductivity for NaVO using the standard Lanczos algorithm. The vanadium ions in NaVO form a…
One-dimensional dynamics of the d-electrons in -NaVO
S. Atzkern, M. Knupfer, M. S. Golden +9
We have studied the electronic properties of the ladder compound -NaVO, adopting a joint experimental and theoretical approach. The momentum-dependent loss function…
Realistic description of electron-energy loss spectroscopy for One-Dimensional SrCuO
A. Huebsch, J. Richter, C. Waidacher +2
We investigate the electron-energy loss spectrum of one-dimensional undoped CuO chains within an extended multi-band Hubbard model and an extended one-band Hubbard model, usi…
Phase diagram of the quarter-filled extended Hubbard model on a two-leg ladder
Matthias Vojta, Arnd Huebsch, R. M. Noack
We investigate the ground-state phase diagram of the quarter-filled Hubbard ladder with nearest-neighbor Coulomb repulsion V using the Density Matrix Renormalization Group techniqu…
Construction of size-consistent effective Hamiltonians for systems with arbitrary Hilbert space
Arnd Huebsch, Matthias Vojta, Klaus W. Becker
Effective Hamiltonians are usually constructed by using canonical transformations or projection techniques. In contrast to this, we present a method for systems with arbitrary Hilb…