AI Article Synopsis
- Photon coincidences are crucial for quantum technologies, revealing nonlinear quantum processes and enabling sources of entanglement.
- New criteria for quantum non-Gaussian two-photon coincidences are established, helping to identify higher-quality photon sources by rejecting less effective Gaussian processes.
- The study also examines the robustness of these non-Gaussian coincidences and compares them to the heralded non-Gaussianity of individual photons.
Article Abstract
Photon coincidences represent an important resource for quantum technologies. They expose nonlinear quantum processes in matter and are essential for sources of entanglement. We derive broadly applicable criteria for quantum non-Gaussian two-photon coincidences that certify a new quality of photon sources. The criteria reject states emerging from Gaussian parametric processes, which often limit applications in quantum technologies. We also analyze the robustness of the quantum non-Gaussian coincidences and compare it to the heralded quantum non-Gaussianity of single photons based on them.
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| http://dx.doi.org/10.1103/PhysRevLett.126.213604 | DOI Listing |
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