3 papers
cond-mat.str-el2026
The competition between low-temperature kinks and magnons at the vicinity of the deconfinement transition point in 1D easy-axis XXZ ferromagnet
P. N. Bibikov
Studying the ordered phases and quantum supercritical low-temperature regime at the vicinity of the deconfinement transition point in 1D easy-axis XXZ ferromagnet, we suggest their…
cond-mat.stat-mech2025
Thermodynamics of the XX spin chain in the QTM approach
P. N. Bibikov
The free energy density of the XX chain in magnetic field is obtained in two alternative ways within the Quantum Transfer Matrix approach. In both the cases the proofs are complete…
nlin.SI2024
R-matrix for the XX spin chain in a staggered magnetic field
P. N. Bibikov
We suggest the elliptic R-matrix for the XX spin chain in a staggered magnetic field. This integrable model is a special case of the more general one, studied long ago…