2 papers
cond-mat.str-el2026
Critical Phases of the extended isotropic chain with four-spin interaction
Nika Kurdadze, Giorgi Gogaberishvili, G. I. Japaridze
Using the Jordan-Wigner transformation we calculate exactly the ground state and low-temperature thermodynamic properties of the spin isotropic chain with four spin in…
cond-mat.str-el2026
Thermal Order by Disorder in Resonating-Valence Bond States on the Checkerboard Lattice
Giorgi Gogaberishvili, Nika Kurdadze, Kirill Shtengel
We derive a local spin-1/2 Hamiltonian with a resonating valence bond ground state on the checkerboard lattice. The state is characterized by the exponential decay of singlet-singl…