Quantum Cohomology and Virasoro Algebra

Details Quantum Cohomology and Virasoro Algebra Quantum Cohomology and Virasoro Algebra

1997-03-12

arxiv.org/abs/hep-th/9703086v2

Phys.Lett. B402 (1997) 71-80

Physics

High Energy Physics

High Energy Physics - Theory

latex,13pages. Revised version with a few typos corrected

Scientific paper

10.1016/S0370-2693(97)00401-2

We propose that the Virasoro algebra controls quantum cohomologies of general Fano manifolds $M$ ($c_1(M)>0$) and determines their partition functions at all genera. We construct Virasoro operators in the case of complex projective spaces and show that they reproduce the results of Kontsevich-Manin, Getzler etc. on the genus-0,1 instanton numbers. We also construct Virasoro operators for a wider class of Fano varieties. The central charge of the algebra is equal to $\chi(M)$, the Euler characteristic of the manifold $M$.

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