The momentum distribution function n (k) and spin-correlation function S (k) are determined for the one-dimensional large-U Hubbard model with various electron densities. The present …
Exact spectra of periodic samples are computed up to N= 36. Evidence of an extensive set of low-lying levels, lower than the softest magnons, is exhibited. These low-lying quantum …
B Bernu, C Lhuillier, L Pierre - Physical review letters, 1992 - APS
We show how the broken symmetries of the Néel state are embodied in the exact spectrum of the triangular Heisenberg antiferromagnet on finite lattices as small as N= 21 (spectra up …
We propose a scheme to restore spatial symmetry of Hamiltonian in the variational-quantum- eigensolver (VQE) algorithm for which the quantum circuit structures used usually break the …
T Jolicoeur, JC Le Guillou - Physical Review B, 1989 - APS
We perform the standard spin-wave analysis of the triangluar Heisenberg quantum antiferromagnet. Contrary to the variational calculation of Anderson, we diagonalize exactly …
We propose that the disordered state of a two-dimensional spin-1/2 Heisenberg antiferromagnet is physically equivalent to the incompressible liquid state of the fractional …
T Tonegawa, I Harada - Journal of the Physical Society of Japan, 1987 - journals.jps.jp
The ground-state properties of the one-dimensional isotropic spin-1/2 Heisenberg antiferromagnet with antiferromagnetic first-and second-neighbor exchange interactions are …
Recent experimental and theoretical investigations of frustrated triangular-lattice antiferromagnets are reviewed. An analysis is made of phases with different structures …
S Miyashita - Journal of the Physical Society of Japan, 1986 - jstage.jst.go.jp
抄録 Magnetic properties of Ising-like Heisenberg antiferromagnets on the triangular lattice are studied. In particular, the magnetization curve, M z (H z), and phase diagrams in …