"In classical computing, information unit is a bit. The physical states of bits are two logically known as bit 1 and bit 0. These are commonly realized by physical ON state and OFF state of transistor. In quantum computing, equivalently two quantum states define basic information processing unit known as qubit. The representation of qubit 0 and 1.In 1982, the Nobel prize-winning physicist Richard Feynman thought up the idea of a âquantum computersâ, a device which uses the effects of quantum mechanics to its dvantage . In the classical model of computing, the most common building block is bit, it can only lie in two distinct states, 0 or 1. In quantum computers the rules are changed . Not only can a âquantum bitâ, usually referred to as a âqubitâ, exist in the classical 0 and 1 states, this also be in a coherent superposition of both states.
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Last date updated on July, 2014