Tag: Quantum optics

Nonlocal metasurfaces enable quantum phase-gradient imaging
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in Optics
What the study found The study found that a compact quantum phase-gradient imaging system can use two metasurfaces to both generate and analyze quantum light for phase imaging. The system combined a lithium niobate (LiNbO3) metasurface, used to generate spatially entangled photon pairs, with a silicon (Si) metasurface, used to extract phase gradients. Why the…
Coherently driven B centres in hBN emit indistinguishable photons
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in Optics
B centre defects in hexagonal boron nitride demonstrate high-visibility two-photon interference and coherent light emission when excited resonantly using a metal-dielectric cavity structure.
Non-Gaussian measurements enable near-optimal coherent state discrimination
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in Physics and Astronomy
Study demonstrates that non-Gaussian continuous quantum measurements can achieve near-optimal coherent state discrimination, surpassing traditional Gaussian limits without requiring photon detection.

Nonlocal metasurfaces enable quantum phase-gradient imaging