Physik World

Quantum Tunneling The phenomenon in which wave is  probability disappears from one side of a potential barrier and appears on the other side is called quantum tunneling. If the potential barrier energy is more than that of electron then also there is probability of appearing in another side.

Quantum Decoherence Loss of coherence is called quantum decoherence. When wave function is linked to the outer environment or what i called wave function collapse or observer effect the nature of that system is changed. This phenomenon is known as quantum decoherence.  In quantum computer coherence should be maintain for calculations if not then there may come error.