Implementation of group-covariant positive operator valued measures by orthogonal measurements
Implementation of group-covariant positive operator valued measures by orthogonal measurements
We consider group-covariant positive operator valued measures (POVMs) on a finite dimensional quantum system. Following Neumark’s theorem a POVM can be implemented by an orthogonal measurement on a larger system. Accordingly, our goal is to find a quantum circuit implementation of a given group-covariant POVM which uses the symmetry of …