Ding, Ming et Xu, Fan, Bases of the quantum cluster algebra of the Kronecker quiver, Acta mathematica Sinica. English series (Print) , 28(6), 2012, pp. 1169-1178
We construct bar-invariant Z[q±12]-bases of the quantum cluster algebra of Kronecker quiver which are quantum analogues of the canonical basis, semicanonical basis and dual semicanonical basis of the corresponding cluster algebra. As a byproduct, we prove positivity of the elements in these bases.