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Distributed Phase Sensing with Multiphoton States in Optical Interferometry
Subhrajit Modak, Danilo Triggiani, Cosmo Lupo
We investigate interferometric phase-estimation using separable photon inputs that evolve into number-path entangled states through linear optical networks, followed by photon-numb…
Experimental subdiffraction source discrimination enabled by spatial demultiplexing and single-photon detectors
Luigi Santamaria Amato, Danilo Triggiani, Cosmo Lupo
We experimentally demonstrate a universal, parameter-independent test for asymmetric source discrimination below the diffraction limit. The test exploits spatial-mode demultiplexin…
Achieving quantum-limited sub-Rayleigh identification of incoherent sources with arbitrary intensities
Danilo Triggiani, Cosmo Lupo
The Rayleigh diffraction limit imposes a fundamental restriction on the resolution of direct imaging systems, hindering the identification of incoherent optical sources, such as ce…
Momentum-resolved two photon interference of weak coherent states
Fabrizio Sgobba, Francesco Di Lena, Danilo Triggiani +7
We demonstrate an experimental scheme for high-precision position measurements based on transverse-momentum-resolved two-photon interferometry with independent photons and single p…
High-Precision Measurement of Time Delay with Frequency-Resolved Hong-Ou-Mandel Interference of Weak Coherent States
Francesco Di Lena, Fabrizio Sgobba, Danilo Triggiani +7
We demonstrate a scheme for high-precision measurements of time delay based on frequency-resolved Hong-Ou-Mandel (HOM) interference. Our approach is applied to weak coherent states…
Zeptosecond-scale single-photon gyroscope
Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma +4
This paper presents an all-fiber telecom-range optical gyroscope employing a spontaneous parametric down conversion crystal to produce ultra-low intensity thermal light by tracing-…