For decades, quantum imaging has promised sharper images and greater light sensitivity than classical methods by exploiting the unique properties of quantum light, such as photon entanglement. But the ...

For two decades, a deceptively simple question has split condensed‑matter physicists: do the electrons in gold quietly align their spins, or is the metal as magnetically featureless as textbooks claim ...

Figure. Concept of new quantum imaging with ultra-thin nonlinear metasurfaces. The metasurface generates spatially entangled photon pairs, with their emission angle tunable via the pump laser ...

"This shows that the wave-ness and particle-ness of a quantum object can be used as a resource in quantum imaging, and potentially many other quantum information or computational tasks," Qian says.

Researchers from Wits University and Universitat Autònoma de Barcelona show how controlling the structure of photons in space and time enables tailored quantum states for next-generation communication ...