18 citations · 90 across the 11 of their papers we have counts for
11 papers
Localization and delocalization of fermions in a background of correlated spins
Tetsuya Takaishi, Kazuhiko Sakakibara, Ikuo Ichinose +1
We study the (de)localization phenomena of one-component lattice fermions in spin backgrounds. The O(3) classical spin variables on sites fluctuate thermally through the ordinary n…
Antiferromagnetic, metal-insulator, and superconducting phase transitions in underdoped cuprates: Slave-fermion t-J model in the hopping expansion
Akihiro Shimizu, Koji Aoki, Kazuhiko Sakakibara +2
In the present paper, we study a system of doped antiferromagnet in three dimensions at finite temperatures by using the t-J model, a canonical model of strongly-correlated electro…
Antiferromagnetic Order and Bose-Einstein Condensation in Strongly-Correlated Cold-Atom Systems: Bosonic t-J Model in the Double-CP^1 Representation
Yuki Nakano, Takumi Ishima, Naohiro Kobayashi +3
We study the three-dimensional bosonic t-J model, i.e., the t-J model of "bosonic electrons" at finite temperatures. This model describes a system of cold bosonic atoms with two sp…
Magnetic order, Bose-Einstein condensation, and superfluidity in a bosonic t-J model of CP^1 spinons and doped Higgs holons
Koji Aoki, Kazuhiko Sakakibara, Ikuo Ichinose +1
We study the three-dimensional U(1) lattice gauge theory of a CP spinon (Schwinger boson) field and a Higgs field. It is a bosonic - model in slave-particle representatio…
Higgs mechanism and superconductivity in U(1) lattice gauge theory with dual gauge fields
Tomoyoshi Ono, Yuki Moribe, Shunsuke Takashima +3
We introduce a U(1) lattice gauge theory with dual gauge fields and study its phase structure. This system is motivated by unconventional superconductors like extended s-wave and d…
Self-Reduction Rate of a Microtubule
Takashi Hiramatsu, Tetsuo Matsui, Kazuhiko Sakakibara
We formulate and study a quantum field theory of a microtubule, a basic element of living cells. Following the quantum theory of consciousness by Hameroff and Penrose, we let the s…