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Multiparameter quantum metrology at Heisenberg scaling for an arbitrary two-channel linear interferometer with squeezed light
Atmadev Rai, Danilo Triggiani, Paolo Facchi +1
We present a framework for simultaneously estimating all four real parameters of a general two-channel unitary U(2) with Heisenberg-scaling precision. We derive analytical expressi…
quant-ph2025
Slow convergence of Trotter decomposition for rotations
Paolo Facchi, Francesco Perrini, Vito Viesti
We study the Trotter approximation for a pair of orbital angular momentum operators, and . In particular, we investigate the scaling behavior of the state-dependent Trot…