Connected quantized Weyl algebras and quantum cluster algebras

Abstract

For an algebraically closed field $K$, we investigate a class of noncommutative $K$-algebras called connected quantized Weyl algebras. Such an algebra has a PBW basis for a set of generators $\{x_1,\dots,x_n\}$ such that each pair satisfies a relation of the form $x_ix_j=q_{ij}x_jx_i+r_{ij}$, where $q_{ij}\in K^*$ and $r_{ij}\in K$, with, in some sense, sufficiently many pairs for which $r_{ij}\neq 0$. We classify connected quantized Weyl algebras, showing that there are two types, linear and cyclic, each depending on a single parameter $q$. When $q$ is not a root of unity we determine the prime spectra for each type. In the linear case all prime ideals are completely prime but in the cyclic case, which can only occur if $n$ is odd, there are prime ideals for which the factors have arbitrarily large Goldie rank. We apply connected quantized Weyl algebras to obtain presentations of the quantum cluster algebras for two classes of quiver, namely, for $m$ even, the Dynkin quiver of type $A_m$ and the quiver $P_m^{(1)}$ identified by Fordy and Marsh in their analysis of periodic quiver mutation. We establish Poisson analogues of the results on prime ideals and quantum cluster algebras.