An entangled walk of photons

摘要

Quantum mechanics is the most successful model of nature that we have, accurately describing fundamental physical processes. Although quantum effects such as entanglement and superposition are counterintuitive and often described as 'spooky', they are being observed and characterized in laboratories worldwide. Writing in Physical Review Letters, Sansoni et al. describe how they have designed and built an optical network, integrated in a glass chip, that manipulates photons to simulate a process known as a discrete-time quantum walk.