Characterization of a qubit Hamiltonian using adaptive measurements in a fixed basis
Characterization of a qubit Hamiltonian using adaptive measurements in a fixed basis
We investigate schemes for Hamiltonian parameter estimation of a two-level system using repeated measurements in a fixed basis. The simplest (Fourier based) schemes yield an estimate with a mean square error (MSE) that decreases at best as a power law ~N^{-2} in the number of measurements N. By contrast, we …