Science Fair Project Encyclopedia
Fermi's Golden Rule
Fermi's golden rule is a way to calculate the transition rate between two states of a system using perturbation theory, which means it's an approximation. The transition probability per unit of time is given by:
where ρ is the density of final states, δ is the Dirac delta function, and < f | V | i > is the matrix element (in bra-ket notation) of the potential, V, between the final and initial states.
Although named after Enrico Fermi, most of the work leading to the Golden Rule was done by Dirac.
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Last updated: 06-24-2005 14:57:48
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details