Tachyons might sound like creatures ripped out of a George R. R. Martin novel, but the reality is that they refer to as-yet-non-existent particles not only capable of travelling faster than the speed ...

Since optical analog computing devices are passive—that is, they do not need electrical power—almost no energy is consumed, and moreover, the operation is literally done at the speed of light.

Majumdar and Heide's research prototype uses optics for computing, significantly reducing power consumption and enabling the camera to identify objects at the speed of light. Their device also ...