108 citations · 270 across the 6 of their papers we have counts for
7 papers
Systematic Derivation of Order Parameters through Reduced Density Matrices
Shunsuke Furukawa, Gregoire Misguich, Masaki Oshikawa
A systematic method for determining order parameters for quantum many-body systems on lattices is developed by utilizing reduced density matrices. This method allows one to extract…
Saturated Ferromagnetism from Statistical Transmutation in Two Dimensions
Yasuhiro Saiga, Masaki Oshikawa
The total spin of the ground state is calculated in the U -> infinity Hubbard model with uniform magnetic flux perpendicular to a square lattice, in the absence of Zeeman coupling.…
Fractionalization, topological order, and quasiparticle statistics
Masaki Oshikawa, T. Senthil
We argue, based on general principles, that topological order is essential to realize fractionalization in gapped insulating phases in dimensions . In with genus $g…
Bose-Einstein Condensation of Magnons in TlCuCl3: Phase diagram and specific heat from a self-consistent Hartee-Fock calculation with a realistic dispersion relation
Gregoire Misguich, Masaki Oshikawa
We extend the self-consistent Hartree-Fock-Popov calculations by Nikuni et al. [Phys. Rev. Lett. 84, 5868 (2000)] concerning the Bose-Eistein condensation of magnons in TlCuCl3 to…
Direct perturbation theory on the shift of Electron Spin Resonance
Yoshitaka Maeda, Masaki Oshikawa
We formulate a direct and systematic perturbation theory on the shift of the main paramagnetic peak in Electron Spin Resonance, and derive a general expression up to second order.…
Insulator, conductor and commensurability: a topological approach
Masaki Oshikawa
I discuss a topological relation of the conduction property of a many-particle system on a periodic lattice at zero temperature to the energy spectrum. When the particle number per…