Quantum Tunnelling - Faster Than Light

Faster Than Light

It is possible for spin zero particles to travel faster than the speed of light when tunnelling. This apparently violates the principle of causality (physics), since there will be a frame of reference in which it arrives before it has left. However, careful analysis of the transmission of the wave packet shows that there is actually no violation of relativity theory. In 1998, P.E. Low reviewed briefly the phenomenon of zero time tunneling. More recently experimental tunneling time data of phonons, photons, and electrons are published by G. Nimtz.

See also: Faster-than-light

Read more about this topic:  Quantum Tunnelling

Famous quotes containing the words faster than, faster and/or light:

    “If everybody minded their own business,” the Duchess said in a hoarse growl, “the world would go round a deal faster than it does.”
    Lewis Carroll [Charles Lutwidge Dodgson] (1832–1898)

    Unignorant,
    modest and unemotional, and all emotion,
    he has everlasting vigor,
    power to grow,
    though there are few creatures who can make one
    breathe faster and make one erecter.
    Marianne Moore (1887–1972)

    The press is no substitute for institutions. It is like the beam of a searchlight that moves restlessly about, bringing one episode and then another out of darkness into vision. Men cannot do the work of the world by this light alone. They cannot govern society by episodes, incidents, and eruptions. It is only when they work by a steady light of their own, that the press, when it is turned upon them, reveals a situation intelligible enough for a popular decision.
    Walter Lippmann (1889–1974)