Bra-ket notation

Bra-ket notation is the standard notation for describing quantum states in the theory of quantum mechanics. It can also be used to denote abstract vectors and linear functionals in pure mathematics. It is so called because the inner product of two states is denoted by a bracket, langlephi|psi angle, consisting of a left part, langlephi|, called the bra, and a right part, |psi angle, called the ket. The notation was invented by Paul Dirac, and is also known as Dirac notation. It has recently become popular in quantum computing.

Related Topics:
Quantum states - Quantum mechanics - Vectors - Linear functional - Mathematics - Inner product - Paul Dirac - Quantum computing

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