Double-Slit Time Trip
“In a first, scientists have shown that they can send light through “slits” in time.
The new experiment is a twist on a 220-year-old demonstration, in which light shines through two slits in a screen to create a unique diffraction pattern across space, where the peaks and troughs of the light wave add up or cancel out. In the new experiment, researchers created a similar pattern in time, essentially changing the color of an ultrabrief laser pulse.
The findings pave the way for advances in analog computers that manipulate data imprinted on beams of light instead of digital bits – it might even make such computers “learn” from the data. They also deepen our understanding of the fundamental nature of light and its interactions with materials…”
Scientists create ‘slits in time’ in mind-bending physics experiment – Live Science
the observer effect 