Multi-parameter estimation of the state of two interfering photonic qubits
arXiv:2405.12870 · doi:10.1088/1402-4896/adaf7b
Abstract
It is demonstrated a two-photon interfering technique based on polarization-resolved measurements for the simultaneous estimation with the maximum sensitivity achievable in nature of multiple parameters associated with the polarization state of two interfering photonic qubits. This estimation is done by exploiting a novel interferometry technique based on polarization-resolved two-photon interference. We show the experimental feasibility and accuracy of this technique even when a limited number of sampling measurements is employed. This work is relevant for the development of quantum technologies with photonic qubits and sheds light on the physics at the interface between multiphoton interference, boson sampling, multi-parameter quantum sensing and quantum information processing.
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- Momentum-entangled two-photon interference for quantum-limited transverse-displacement estimation
- Quantum-limited estimation of the frequency shift between two interfering photons by time sampling of their quantum beats
- Momentum-resolved two photon interference of weak coherent states