In quantum world, particles like photons can behave like particles (localized points) or waves (spreading out, showing interference patterns). The classic double-slit experiment is a good ...

(via PBS Space Time) Does quantum mechanics allow the future to retroactively influence the past, as in the infamous delayed choice quantum eraser experiment? How about we get an actual quantum ...

The potentially worldchanging (if successful) test of a quantum drive in orbit is being delayed by rare and infrequent communication to the cubesat. These are not problems with the drive but with the ...