We present evidence that the ground state of the frustrated Heisenberg antiferromagnet in
two dimensions is well described by a fractional quantum Hall wave function for bosons …

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 …

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 …

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 …

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 …

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 …