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44 papers · 1 filter
Ferromagnetism in the Hubbard model with long-range and correlated hopping
Pavol Farkasovsky
The extrapolation of small-cluster exact-diagonalization calculations is used to examine ferromagnetism in the one-dimensional Hubbard model with long-range and correlated hopping.…
Momentum distribution of itinerant electrons in the one-dimensional Falicov-Kimball model
Pavol Farkasovsky
The momentum distribution of itinerant electrons in the one-dimensional Falicov-Kimball model is calculated for various ground-state phases. In particular, we examine the per…
Phase transitions induced by correlated hopping in the Falicov-Kimball model
Hana Cencarikova, Pavol Farkasovsky
The extrapolation of finite-cluster calculations is used to examine properties of the one-dimensional Falicov-Kimball model with correla It is shown that the correlated hopping str…
Geodesic distances on density matrices
Anna Jencova
We find an upper bound for geodesic distances associated to monotone Riemannian metrics on positive definite matrices and density matrices.
Combined energy -- diffraction data refinement of decagonal AlNiCo
M. Mihalkovič, C. L. Henley, M. Widom
We incorporate realistic pair potential energies directly into a non-linear least-square fit of diffraction data to quantitatively compare structure models with experiment for the…
Generalized measurements via programmable quantum processor
Marian Rosko, Vladimir Buzek, Paul Robert Chouha +1
We show that it is possible to control the trade-off between information gain and disturbance in generalized measurements of qudits by utilizing the programmable quantum processor.…