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quant-ph2025
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-ph2024
Superresolution imaging of two incoherent sources via two-photon interference sampling measurements in the transverse momenta
Salvatore Muratore, Danilo Triggiani, Vincenzo Tamma
The Rayleigh's criterion infamously imposes a minimum separation between two incoherent sources for them to be distinguishable via classical methods. In this work, we demonstrate t…
quant-ph2024
Quantum-limited estimation of the frequency shift between two interfering photons by time sampling of their quantum beats
Luca Maggio, Danilo Triggiani, Paolo Facchi +1
We present a sensing scheme for estimating the frequency difference of two non-entangled photons. The technique consists of time-resolving sampling measurements at the output of a…