I'm looking for an explanation or a reference to why there is this equivelence of triangulated categories: $${D}^b(\mathrm {Coh}(\mathbf P^1))\simeq {D}^b(\mathrm {Rep}(\bullet\rightrightarrows \bullet))$$$${D}^b(\mathrm {Coh}(\Bbb P^1))\simeq {D}^b(\mathrm {Rep}(\bullet\rightrightarrows \bullet))$$ It is my understanding that the only reason why $\mathbf P^1$$\Bbb P^1$ appears at all is because it is used to index the regular irreducible representations of the Kronecker quiver. I have also heard that this equivalence can be used to understand the geometry of $\mathbf P^1$$\Bbb P^1$.
I suppose more generally, adding arrows to the Kronecker quiver gives a similar result for $\mathbf P^n$$\Bbb P^n$.