Abstract High-dimensional biphoton states are promising resources for quantum applications, ranging from high-dimensional communications to imaging. A pivotal task is fully characterizing these states, which generally time-consuming and not scalable when projective measurement approaches adopted; however, new advances in coincidence imaging technologies allow overcoming limitations by parallelizing multiple measurements. Here we introduce digital holography, analogy off-axis where of the...

Abstract The characterization of a quantum device is crucial step in the development experiments. This accomplished via Quantum Process Tomography, which combines outcomes different projective measurements to deliver possible reconstruction underlying process. tomography typically performed by processing an overcomplete set and extracting process matrix from maximum-likelihood estimation. Here, we introduce Fourier technique requires reduced number measurements, benchmark its performance...

The Aharonov-Bohm effect is a physical phenomenon where the vector potential induces phase shift of electron wavepackets in regions with zero magnetic fields. It often referred to as evidence for reality potential. A similar can be observed solid-state systems, Berry connection influence dynamics. Here, we show that chiral-symmetric processes determines an observable on mean chiral displacement delocalized wavefunctions. This finding supported by photonic experiment realizing topological...

The complete measurement of the quantum state two correlated photons requires reconstructing amplitude and phase biphoton wavefunction. We show how, by means spatially resolved single photon detection, one can infer spatial structure bi-photons generated spontaneous parametric down conversion. In particular, a analysis second-order correlations allows us to isolate moduli pump phasematching contributions two-photon states. When carrying this on different propagation planes, free space is...

Abstract Optical knots and links are nontrivial three-dimensional topologies consisting of trajectories phase or polarisation singularities. They theoretically predicted experimentally observed in paraxial nonparaxial regimes random speckle fields. The topological nature optical suggests that environmental disturbances should not alter their topology, hence becoming a resilient vector information. However, the robustness under typical encountered experiments has been investigated. Here, we...

Recent years have seen a surge in research on the role of quantum geometry condensed matter physics. For instance, Aharonov-Bohm effect is physical phenomenon where vector potential induces phase shift electron wavepackets regions with zero magnetic fields due to an obstruction space associated flux. A similar can be observed solid-state systems, topology Berry connection influence dynamics. These are paradigmatic examples how dynamics affected by system's geometry. Here, we show that...

The complete measurement of the quantum state two correlated photons requires reconstructing amplitude and phase biphoton wavefunction. We show how, by means spatially resolved single photon detection, one can infer spatial structure biphotons generated spontaneous parametric down conversion. In particular, a analysis second-order correlations allows us to isolate moduli pump phase-matching contributions two-photon states. When carrying this on different propagation planes, free-space is...

Two-photon states generated through degenerate spontaneous parametric down-conversion (SPDC) can exhibit sharp correlations in the transverse spatial coordinates. This effect, associated with separability of biphoton wavefunction into functions centroid and difference coordinates, leads to unique free space propagation features. Here, we show that if a phase object is placed image plane source, only function coordinates altered. be experimentally reconstructed coincidence imaging via...

Optical knots and links, consisting of trajectories phase or polarisation singularities, are intriguing nontrivial three-dimensional topologies. They theoretically predicted experimentally observed in paraxial non-paraxial regimes, as well random speckle fields. Framed nested can be employed security protocols for secret key sharing, quantum money, topological computation. The nature optical suggests that environmental disturbances should not alter their topology; therefore, they may...

High-dimensional biphoton states are promising resources for quantum applications, ranging from high-dimensional communications to imaging. A pivotal task is fully characterising these states, which generally time-consuming and not scalable when projective measurement approaches adopted. However, new advances in coincidence imaging technologies allow overcoming limitations by parallelising multiple measurements. Here, we introduce digital holography, analogy off-axis where of the...

The characterization of a quantum device is crucial step in the development experiments. This accomplished via Quantum Process Tomography, which combines outcomes different projective measurements to deliver possible reconstruction underlying process. tomography typically performed by processing an overcomplete set and extracting process matrix from maximum-likelihood estimation. Here, we introduce new technique, referred as Fourier requires reduced number measurements, benchmark its...