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Measuring incompatibility and clustering quantum observables with a quantum switch
The MED provides a metric on the space of von Neumann measurements, and can be efficiently estimated by letting the measurement processes act in an indefinite order, using a setup known as the quantum switch, which also allows one to quantify the noncommutativity of arbitrary quantum processes.
A characterization of singular Schrödinger operators on the half-line
Moreover, we discuss explicitly our results in the case of potentials that are linear in a neighbourhood of the origin.
Mathematical Physics Functional Analysis Mathematical Physics Spectral Theory 34L40, 34E15, 35J10, 03H05, 26E35, 47S20
