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10 papers · 1 filter
Precise Determination of Phase Diagram for Two-Dimensional Hubbard Model with Filling- and Bandwidth-Control Mott Transitions: Grand-Canonical Path-Integral Renormalization Group Approach
Shinji Watanabe, Masatoshi Imada
A new numerical algorithm for interacting fermion systems to treat the grand-canonical ensemble is proposed and examined by extending the path-integral renormalization group method…
G-type antiferromagnetism and orbital ordering due to the crystal field from the rare-earth ions induced by the GdFeO_3-type distortion in RTiO_3 with R=La, Pr, Nd and Sm
Masahito Mochizuki, Masatoshi Imada
The origin of the antiferromagnetic order and puzzling properties of LaTiO_3 as well as the magnetic phase diagram of the perovskite titanates are studied theoretically. We show th…
Optical pumping NMR in the compensated semiconductor InP:Fe
Atsushi Goto, Kenjiro Hashi, Tadashi Shimizu +6
The optical pumping NMR effect in the compensated semiconductor InP:Fe has been investigated in terms of the dependences of photon energy (E_p), helicity (sigma+-), and exposure ti…
Notes on the Fidelity of Symplectic Quantum Error-Correcting Codes
Mitsuru Hamada
Two observations are given on the fidelity of schemes for quantum information processing. In the first one, we show that the fidelity of a symplectic (stabilizer) code, if properly…
Quantum-number projection in the path-integral renormalization group method
Takahiro Mizusaki, Masatoshi Imada
We present a quantum-number projection technique which enables us to exactly treat spin, momentum and other symmetries embedded in the Hubbard model. By combining this projection t…
SU(2) Non-Abelian Holonomy and Dissipationless Spin Current in Semiconductors
Shuichi Murakami, Naoto Nagaosa, Shou-Cheng Zhang
Following our previous work [S. Murakami, N. Nagaosa, S. C. Zhang, Science 301, 1348 (2003)] on the dissipationless quantum spin current, we present an exact quantum mechanical cal…