Quantum Chemistry 4.8 – Dirac Notation

Short lecture Dirac notation in quantum mechanics.

Dirac notation is a shorthand notation for expressions which appear frequently in quantum mechanics. In Dirac notation, a wavefunction is represented as a “ket” vector. The complex conjugate of a function is represented as a “bra” vector. Together, a “bra-ket” is the product of a bra and a ket integrated over all space. A matrix element is the integral over all space of an operator actor on a ket multiplied by a bra. This notation allows quick, convenient expressions for overlap integrals, expectation values, and the definition of a Hermitian operator.

Notes Slide: http://i.imgur.com/HEg2D3j.png

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