The differential sail was another speculative proposal, which appealed to the zero-point energy field. As the Heisenberg uncertainty principle implies that there is no such thing as an exact amount of energy in an exact location, vacuum fluctuations are known to lead to discernible effects such as the Casimir effect. The differential sail was a speculation that it might be possible to induce differences in the pressure of vacuum fluctuations on either side of sail-like structure—with the pressure being somehow reduced on the forward surface of the sail, but pushing as normal on the aft surface—and thus propel a vehicle forward.
Read more about this topic: Breakthrough Propulsion Physics Program
Famous quotes containing the words differential and/or sail:
“But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.”
—Antonin Artaud (1896–1948)
“Stately as a galleon, I sail across the floor,
Doing the military two-step, as in the days of yore.”
—Joyce Grenfell (1910–1979)