Sum rule in quantum mechanics
id:
sum-rule-in-quantum-mechanics-251-10289346
title:
Sum rule in quantum mechanics
text:
In quantum mechanics, a sum rule is a formula for transitions between energy levels, in which the sum of the transition strengths is expressed in a simple form. Sum rules are used to describe the properties of many physical systems, including solids, atoms, atomic nuclei, and nuclear constituents such as protons and neutrons. The sum rules are derived from general principles, and are useful in situations where the behavior of individual energy levels is too complex to be described by a precise q
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encyclopedia
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https://en.wikipedia.org/wiki/Sum_rule_in_quantum_mechanics
date created:
date modified:
2022-10-04T01:29:58Z
main entity:
{"identifier":"Q7636898","url":"https://www.wikidata.org/entity/Q7636898"}
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13
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