## Background ##
### The Quantum Torus ###
Let $q$ be an arbitrary complex number, and define (the algebra of) the quantum torus to be
$$T_q:=\mathbb{C}\langle x^{\pm 1},y^{\pm 1}\rangle/xy-qyx$$
For $q=1$, this is the commutative ring of functions on the torus $\mathbb{C}^\times\times \mathbb{C}^\times$; hence, for general $q$, this is regarded as a quantization of the torus.

### Hall Algebras ###
Consider a small abelian category $A$, with the property that $Hom_A(M,N)$ and $Ext^i_A(M,N)$ are always finite sets for any $M,N\in A$ and $i\in \mathbb{Z}$.  Let $\overline{A}$ denote the set of isomorphism classes in $A$, and let 
$$H(A)=\oplus_{[M]\in \overline{A}}\mathbb{C}[M]$$
denote the complex vector space spanned by $\overline{A}$.  Endow $H(A)$ with a multiplication by the formula
$$ [M]\cdot [N]=\sqrt{\langle [M],[N]\rangle)}\sum_{[R]\in \overline{A}}\frac{a_{MN}^R}{|Aut(M)||Aut(N)|}[R]$$
where $a_{MN}^R$ is the number of short exact sequences
$$0\rightarrow N\rightarrow R\rightarrow M\rightarrow 0$$
and 
$$\langle [M],[N]\rangle = \sum (-1)^i |Ext^i_A(M,N)|$$
is the Euler form.  This multiplication makes $H(A)$ into an associate algebra called the **Hall algebra** of $A$; the proof can be found e.g. [here][1].

### Finite Fields and Quantization ###
The categories $A$ appearing in the construction of a Hall algebra are usually linear over some finite field $\mathbb{F}_q$.  Often, it is possible to simultaneously define a category $A_q$ for each finite field $\mathbb{F}_q$; usually by considering modules on the $\mathbb{F}_q$-points of some scheme over $\mathbb{Z}$.  The corresponding Hall algebras $H(A_q)$ will then usually be closely related, and can often be defined by relations that are functions in $q$.

## The Question ##
I know that there are cases where an algebra is deformed by a parameter $q$, and then the resulting family of algebras `magically' coincides with a family of Hall algebras $H(A_q)$ in the special cases when $q$ is a prime power.  I think this happens in the case of the Hecke algebra (discussed [here][2]), and the case of quantum universal enveloping algebras (discussed [here][3]).  I somewhat understand that this is a symptom of a related convolution algebra on the scheme used to define $A_q$.

**Is there a family of categories $A_q$ such that the corresponding Hall algebras $H(A_q)$ are isomorphic to the Quantum Torus $T_q$ for all $q$ a prime power?  If so, is there a convolution algebra realization of the Quantum Torus?**



  [1]: http://arxiv.org/abs/math/0611617
  [2]: https://mathoverflow.net/questions/4547/definitions-of-hecke-algebras/4555#4555
  [3]: https://mathoverflow.net/questions/5538/why-drinfeld-jimbo-type-quantum-groups