## KAWAHIGASHI, Yasuyuki

 Title Professor Field Operator Algebras Research interests Algebraic Quantum Field Theory Current research I study conformal field theory from the operator algebraic viewpoint. Rather than using Wightman fields, we deal with a net of operator algebras generated by local observables. Such an approach is called an algebraic quantum field theory. The representation theoretic aspects based on the Jones theory of subfactors are mainly focused, and I have close connections to theories of vertex operator algebras and quantum invariants in 3-dimensional topology. Selected publications (with C. E. Sutherland, M. Takesaki) The structure of the automorphism group of an injective factor and the cocycle conjugacy of discrete abelian group actions, Acta Math. 169 (1992), 105-130. On flatness of Ocneanu's connections on the Dynkin diagrams and classification of subfactors, J. Funct. Anal. 127 (1995), 63-107. (with M. Izumi) Classification of subfactors with the principal graph D^(1)_n, J. Funct. Anal. 112 (1993), 257-286. (with D. E. Evans) Orbifold subfactors from Hecke algebras, Commun. Math. Phys. 165 (1994), 445-484. Centrally trivial automorphisms and an analogue of Connes's chi(M) for subfactors, Duke Math. J. 71 (1993), 93-118. (with J. Bockenhauer, D. E. Evans) On alpha-induction, chiral generators and modular invariants for subfactors, Commun. Math. Phys. 208 (1999), 429-487. (with R. Longo, M. Mueger) Multi-interval subfactors and modularity of representations in conformal field theory, Commun. Math. Phys. 219 (2001), 631-669. (with R. Longo) Classification of local conformal nets: Case c < 1, Ann. of Math. 160 (2004), 493-522. (with R. Longo) Classification of two-dimensional local conformal nets with c < 1 and 2-cohomology vanishing for tensor categories, Commun. Math. Phys. 244 (2004), 63-97. (with R. Longo) Local conformal nets arising from framed vertex operator algebras, Adv. Math. 206 (2006), 729-751. (with S. Carpi, R. Hillier, R. Longo) Spectral triples and the super-Virasoro algebra, Commun. Math. Phys. 295 (2010), 71-97. (with S. Carpi, R. Longo) How to add a boundary condition, Commun. Math. Phys. (to appear) Books (with D. E. Evans) "Quantum Symmetries on Operator Algebras" Oxford University Press (1998). Memberships The Mathematical Society of Japan, American Mathematical Society, International Association of Mathematical Physics Awards Operator Algebra Prize (2000), The Spring Prize of the Mathematical Society of Japan (2002). Activities Editors of the following journals: Commun. Math. Phys., Intenat. J. Math., Japan. J. Math., J. Math. Phys. , J. Math. Sci. Univ. Tokyo, Rev. Math. Phys.