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Qubit

In quantum information theory and quantum computation, a qubit is one quantum bit of information which can be described by a state vector in 2 dimensions (2-dimensional vector space over the complex numbers).

A qubit is similar to a classical bit of computer information (always read as a 0 or a 1), but the qubit allows for a third state, which is a superposition of both 1 and 0. The states of a qubit are measured in vectors, or basis states. These are represented using the standard QM Dirac bracket notation. The pure qubit space is superpositional, and multiple qubits can be nonlocally entangled with others, allowing for sets of qubits to express a higher correlation than classical systems can achieve. This equates to an ability to perform massive parallel computations at the same time, as is planned in future quantum computers.

Web Resources On Qubit

Qubit (World Wide Words)
Qubit (Wikipedia)
QubitNews

Book Resources On Qubit

Principles of Quantum Computation and Information by Guiliano Benenti, Guilio Casati, Guiliano Strini
Introduction to Quantum Computation by Ioan Burda
Quantum Computation by American Mathematical Society Short Course

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