#### Filter Results:

- Full text PDF available (15)

#### Publication Year

1996

2010

- This year (0)
- Last 5 years (0)
- Last 10 years (4)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Chigak Itoi
- 2008

We calculate wide distance connected correlators in non-gaussian orthogonal , unitary and symplectic random matrix ensembles by solving the loop equation in the 1/N-expansion. The multi-levelâ€¦ (More)

We calculate connected correlators in Gaussian orthogonal, unitary and symplectic random matrix ensembles by the replica method in the 1/N-expansion. We obtain averaged one-point Green's functions upâ€¦ (More)

- Toru Sakai, Masahiro Sato, Kiyomi Okamoto, Kouichi Okunishi, Chigak Itoi
- Journal of physics. Condensed matter : anâ€¦
- 2010

Recent developments of theoretical studies on spin nanotubes are reviewed, especially focusing on the S = 1/2 three-leg spin tube. In contrast to the three-leg spin ladder, the tube has a spin gap inâ€¦ (More)

Thirty years ago, Coleman proved that no continuous symmetry is broken spontaneously in a two-dimensional relativistic quantum field theory. In his argument, however, it is difficult to understandâ€¦ (More)

- Chigak Itoi, Masa - Hide Kato
- 2008

We study the phase diagram of isotropic spin-1 models in the vicinity of the Uimin-Lai-Sutherland (ULS) model. This is done with the help of a level-one SU (3) Wess-Zumino-Witten model with certainâ€¦ (More)

- Yoshinori Sakamoto, Hisamitsu Mukaida, Chigak Itoi
- Physical review letters
- 2006

The functional renormalization group for the random-field and random-anisotropy O(N) sigma models is studied to 2 loop. The ferromagnetic-disordered (F-D) transition fixed point is found to nextâ€¦ (More)

- Chigak Itoi
- 1998

Employing a simple calculation method obtained by M.-H. Kato, we calculate the three loop renormalization group in the su(2) coset conformal field theory with a slightly relevant perturbation and theâ€¦ (More)

Thirty years ago, Coleman proved that no continuous symmetry is broken spontaneously in a two-dimensional relativistic quantum field theory. In his argument, however, it is difficult to understandâ€¦ (More)

We calculate connected correlators in time dependent Gaussian orthogonal and symplectic random matrix ensembles by a diagrammatic method. We obtain averaged one-point Green's functions in the leadingâ€¦ (More)

- Chigak Itoi
- 1998

Employing a simple calculation method obtained by M.-H. Kato, we calculate the three loop renormalization group in the su(2) coset conformal field theory with a slightly relevant perturbation and theâ€¦ (More)