Kapranov's L∞ structures, Fedosov's star products, and one-loop exact BV quantizations on Kahler manifolds

We study quantization schemes on a Kahler manifold and relate several interesting structures. We first construct Fedosov's star products on a Kahler manifold X as quantizations of Kapranov's L-infinity-algebra structure. Then we investigate the Batalin-Vilkovisky (BV) quantizations associated to these star products. A remarkable feature is that they are all one-loop exact, meaning that the Feynman weights associated to graphs with two or more loops all vanish. This leads to a succinct cochain level formula in de Rham cohomology for the algebraic index.