Quivers with Involutions and Shifted Twisted Yangians via Coulomb Branches

To a quiver with involution, we study the Coulomb branch of the 3d $\mathcal{N}=4$ involution-fixed part of the quiver gauge theory. We show that there is an algebra homomorphism from the corresponding shifted twisted Yangian to the quantized Coulomb branch algebra. This gives a new instance of 3D mirror symmetries.