Batalin-Vilkovisky algebra structures on Hochschild Cohomology

Details Batalin-Vilkovisky algebra structures on Hochschild Cohomology Batalin-Vilkovisky algebra structures on Hochschild Cohomology

2007-11-13

arxiv.org/abs/0711.1946v2

Mathematics

Quantum Algebra

minor corrections, essentially typos

Scientific paper

Let $M$ be any compact simply-connected $d$-dimensional smooth manifold and let $\mathbb{F}$ be any field. We show that the Gerstenhaber algebra structure on the Hochschild cohomology on the singular cochains of $M$, $HH^*(S^*(M);S^*(M))$, extends to a Batalin-Vilkovisky algebra. Such Batalin-Vilkovisky algebra was conjecturated to exist and is expected to be isomorphic to the Batalin-Vilkovisky algebra on the free loop space homology on $M$, $H_{*+d}(LM)$ introduced by Chas and Sullivan. We also show that the negative cyclic cohomology $HC^*_-(S^*(M))$ has a Lie bracket. Such Lie bracket is expected to coincide with the Chas-Sullivan string bracket on the equivariant homology $H_*^{S^1}(LM)$.

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