Publications (48)
Bipolarons in the Extended Holstein Hubbard Model
J. Bonca, S. A. Trugman
We numerically and analytically calculate the properties of the bipolaron in an extended Hubbard Holstein model, which has a longer range electron-phonon coupling like the Fr\" ohl…
Magnetic fluctuations and resonant peak in cuprates: a microscopic theory
I. Sega, P. Prelovsek, J. Bonca
The theory for the dynamical spin susceptibility within the t-J model is developed, as relevant for the resonant magnetic peak and normal-state magnetic response in superconducting…
Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice
S. El Shawish, A. Ramsak, J. Bonca
We show that temperature and magnetic field properties of the entanglement between spins on the two-dimensional Shastry-Sutherland lattice can be qualitatively described by analyti…
Direct Calculation of Spin-Stiffness for Spin-1/2 Heisenberg Models
J. Bonca, J. P. Rodriguez, J. Ferrer +1
The spin-stiffness of frustrated spin-1/2 Heisenberg models in one and two dimensions is computed for the first time by exact diagonalizations on small clusters that implement spin…
Microscopic mechanisms of dephasing due to electron-electron interactions
R. Zitko, J. Bonca
We develop a non-perturbative numerical method to study tunneling of a single electron through an Aharonov-Bohm ring where several strongly interacting electrons are bound. Inelast…
Mobile Bipolaron
J. Bonca, T. Katrasnik, S. A. Trugman
We explore the properties of the bipolaron in a 1D Holstein-Hubbard model with dynamical quantum phonons. Using a recently developed variational method combined with analytical str…