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- Takeo Araki, Katsushi Ito, Akihisa Ohtsuka
- 2003

We study four dimensional supersymmetric gauge theory on the noncommutative superspace, recently proposed by Seiberg. We construct the gauge-invariant action of N = 1 super Yang-Mills theory withâ€¦ (More)

We investigate the Penrose limit of various brane solutions including Dp-branes, NS5-branes, fundamental strings, (p, q) fivebranes and (p, q) strings. We obtain special null geodesics with the fixedâ€¦ (More)

- Katsushi Ito
- 1998

We study a supersymmetric extension of the Virasoro algebra on the boundary of the anti-de Sitter space-time AdS 3. Using the free field realization of the currents, we show that the world-sheetâ€¦ (More)

- Katsushi Ito, JENS OLE MADSEN, Jens Lyng Petersen

The classification of extended superconformal algebras of the Knizhnik-Bershadsky type with W-algebra like composite operators occurring in the commutation relations , but with generators only ofâ€¦ (More)

- Naoto Kimura, Katsushi Ito, Kohta Saitoh, Yuhei Umeda, Hidetoshi Aoki, Taichi Terashima
- Physical review letters
- 2005

We report the pressure-induced superconductivity in the noncentrosymmetric heavy-fermion CeRhSi3. The superconductivity emerges above about 12 kbar even though the antiferromagnetic orderingâ€¦ (More)

- Naoto Kimura, Katsushi Ito, Hidetoshi Aoki, Shinya Uji, Taichi Terashima
- Physical review letters
- 2007

We report an extremely high upper critical field B(c2) in the noncentrosymmetric heavy fermion superconductor CeRhSi3 for a magnetic field B along the tetragonal c axis. B(c2)(T=0) possibly reachingâ€¦ (More)

We study deformation of N = 4 super Yang-Mills theory from type IIB superstrings with D3-branes in the constant R-R background. We compute disk amplitudes with one graviphoton vertex operator andâ€¦ (More)

- Dumitru Astefanesei, Suguru Dobashi, Katsushi Ito, Horatiu Stefan Nastase
- 2008

We use the AdS/CFT prescription of Alday and Maldacena [1] to analyze gluon 6-point scattering amplitudes at strong coupling in N = 4 SYM. By cutting and gluing we obtain AdS 6-point amplitudes thatâ€¦ (More)

We extend the AdS/CFT prescription of Alday and Maldacena to finite temperature T , defining the amplitude for gluon scattering in N = 4 Super Yang-Mills at strong coupling from string theory. It isâ€¦ (More)

- Takeo Araki, Katsushi Ito
- 2005

We study N = 2 supersymmetric U(1) gauge theory in non(anti)commutative N = 2 harmonic superspace with the singlet deformation, which preserves chirality. We construct a Lagrangian which is invariantâ€¦ (More)