Title: Gluing algebraic quantum field theories on manifolds

Abstract: It has been observed that, given an algebraic quantum field theory (AQFT) on a manifold $M$ and an open cover $\{M_\alpha\}$ of $M$, it is typically not possible to recover the global algebra of observables on $M$ by simply gluing the underlying local algebras subordinate to $\{M_\alpha\}$. Instead of gluing local algebras, we introduce a gluing construction of AQFTs subordinate to $\{M_\alpha\}$ and we show that for simple examples of AQFTs, constructed out for geometric data, gluing the local AQFTs subordinate to $\{M_\alpha\}$ recovers the global AQFT on $M$. This result implies that the local AQFTs contain more information than the local algebras.