6 papers
Quantum-limited optical delay sensing across an enhanced dynamic range by frequency-resolving two-photon interference
Russell M. J. Brooks, Luca Maggio, Thomas Jaeken +4
Optical sensing schemes that rely on two-photon interference provide a powerful platform for precision metrology, although they are inherently constrained by a trade-off between dy…
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…
Quantum Interference of Distinguishable Photons Based on Spatially-Resolved Measurements
Miguel Angel Gonzalez, Alejandra Alarcón, Andres Camilo Quintero +5
We present experimental results demonstrating the quantum interference of two photons distinguishable in their transverse momenta, each entering the input ports of a balanced beam…
Ultimate quantum sensitivity in the 3D relative localisation of two single-photon emitters via two-photon interference
Luca Maggio, Vincenzo Tamma
We present a quantum sensing protocol for the simultaneous estimation of the difference in the localization parameters of two single-photon sources, paving the way to single-photon…
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…
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…