Tachyons: Messengers from the Future?

Robert Ehrlich

Einstein claimed that faster-than-light (FTL) speeds are impossible, but some physicists are no longer so sure about that notion. Hypothetical subatomic particles that travel at FTL speed are known as tachyons. In this talk we consider how tachyons might be used to send messages back to the past, and how the existence of tachyons can be settled in an experiment.

A/V requirements: LCD projector and screen