Pairs of correlated or entangled photons are a foundational resource in quantum optics. They are most commonly produced through spontaneous parametric down-conversion (SPDC), a nonlinear optical process that typically relies on a stable, coherent laser to pump a...
The Marion County deputy was protected from more severe injuries by his ballistic vest after a suspect attacked him while he was getting out of his cruiser Go to Source
Eighty years ago, Penn researchers J. Presper Eckert and John Mauchly launched the age of electronic computing by harnessing electrons to solve complex numerical problems with ENIAC, the world’s first general-purpose electronic computer. Today, that same...
From the 38th Annual Candlelight Vigil to the Police Unity Tour and K-9 memorial service, agencies across the country honored officers and K-9s who made the ultimate sacrifice Go to Source
The demolished motorbikes were among more than 5,700 seized in 2026; the vehicles were snatched for being unregistered, uninsured, or having fake or altered plates Go to Source
