Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-05-13
Int.J.Mod.Phys.A11:3049-3096,1996
Physics
High Energy Physics
High Energy Physics - Theory
54 pp, 2 epsf figures
Scientific paper
10.1142/S0217751X96001486
Because of the existence of rigid Calabi--Yau manifolds, mirror symmetry cannot be understood as an operation on the space of manifolds with vanishing first Chern class. In this article I continue to investigate a particular type of K\"ahler manifolds with positive first Chern class which generalize Calabi--Yau manifolds in a natural way and which provide a framework for mirrors of rigid string vacua. This class is comprised of a special type of Fano manifolds which encode crucial information about ground states of the superstring. It is shown in particular that the massless spectra of $(2,2)$--supersymmetric vacua of central charge $\hat{c}=D_{crit}$ can be derived from special Fano varieties of complex dimension $(D_{crit}+2(Q-1))$, $Q>1$, and that in certain circumstances it is even possible to embed Calabi--Yau manifolds into such higher dimensional spaces. The constructions described here lead to new insight into the relation between exactly solvable models and their mean field theories on the one hand and their corresponding Calabi--Yau manifolds on the other. It is furthermore shown that Witten's formulation of the Landau--Ginzburg/Calabi--Yau relation can be applied to the present framework as well.
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