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quant-ph2026
Geometric bounds on multiparameter Heisenberg scaling in optical metrology with limited squeezed resources
Atmadev Rai, Paolo Facchi, Vincenzo Tamma
The simultaneous estimation of multiple parameters is a central task in quantum metrology, distributed sensing, and the calibration of large photonic interferometers. A fundamental…
quant-ph2026
Heisenberg-scaling characterization of a two-channel optical network via two-port homodyne detection
Atmadev Rai, Paolo Facchi, Vincenzo Tamma
We present a fully Gaussian and experimentally feasible scheme for the simultaneous estimation of the four real parameters that characterize a two-channel optical network. The sche…