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- Fermi's_golden_rule abstract "In quantum physics, Fermi's golden rule is a way to calculate the transition rate (probability of transition per unit time) from one energy eigenstate of a quantum system into a continuum of energy eigenstates, due to a perturbation.We consider the system to begin in an eigenstate, , of a given Hamiltonian, . We consider the effect of a (possibly time-dependent) perturbing Hamiltonian, . If is time-independent, the system goes only into those states in the continuum that have the same energy as the initial state. If is oscillating as a function of time with an angular frequency , the transition is into states with energies that differ by from the energy of the initial state. In both cases, the one-to-many transition probability per unit of time from the state to a set of final states is given, to first order in the perturbation, bywhere is the density of final states (number of states per unit of energy) and is the matrix element (in bra–ket notation) of the perturbation between the final and initial states.This transition probability is also called decay probability and is related to mean lifetime.Fermi's golden rule is valid when the initial state has not been significantly depleted by scattering into the final states.The most common way to derive the equation is to start with time-dependent perturbation theory and to take the limit for absorption under the assumption that the time of the measurement is much larger than the time needed for the transition.Although named after Fermi, most of the work leading to the Golden Rule was done by Dirac who formulated an almost identical equation, including the three components of a constant, the matrix element of the perturbation and an energy difference. It is given its name because, being such a useful relation, Fermi himself called it "Golden Rule No. 2."Only the magnitude of the matrix element enters the Fermi's Golden Rule. The phase of this matrix element, however, contains separate information about the transition process.It appears in expressions that complement the Golden Rule in the semiclassical Boltzmann equation approach to electron transport.".
- Fermi's_golden_rule wikiPageExternalLink fermi.html.
- Fermi's_golden_rule wikiPageExternalLink QMnote.pdf.
- Fermi's_golden_rule wikiPageID "922567".
- Fermi's_golden_rule wikiPageRevisionID "599759336".
- Fermi's_golden_rule hasPhotoCollection Fermi's_golden_rule.
- Fermi's_golden_rule subject Category:Concepts_in_physics.
- Fermi's_golden_rule subject Category:Enrico_Fermi.
- Fermi's_golden_rule subject Category:Perturbation_theory.
- Fermi's_golden_rule type Abstraction100002137.
- Fermi's_golden_rule type Cognition100023271.
- Fermi's_golden_rule type Concept105835747.
- Fermi's_golden_rule type Content105809192.
- Fermi's_golden_rule type FundamentalPhysicsConcepts.
- Fermi's_golden_rule type Idea105833840.
- Fermi's_golden_rule type PsychologicalFeature100023100.
- Fermi's_golden_rule comment "In quantum physics, Fermi's golden rule is a way to calculate the transition rate (probability of transition per unit time) from one energy eigenstate of a quantum system into a continuum of energy eigenstates, due to a perturbation.We consider the system to begin in an eigenstate, , of a given Hamiltonian, . We consider the effect of a (possibly time-dependent) perturbing Hamiltonian, .".
- Fermi's_golden_rule label "Fermi's golden rule".
- Fermi's_golden_rule label "Fermi's gulden regel".
- Fermi's_golden_rule label "Fermis Goldene Regel".
- Fermi's_golden_rule label "Regla de oro de Fermi".
- Fermi's_golden_rule label "Regola d'oro di Fermi".
- Fermi's_golden_rule label "Regra de ouro de Fermi".
- Fermi's_golden_rule label "Règle d'or de Fermi".
- Fermi's_golden_rule label "Złota reguła Fermiego".
- Fermi's_golden_rule label "Золотое правило Ферми".
- Fermi's_golden_rule label "قاعدة فيرمي الذهبية".
- Fermi's_golden_rule label "フェルミの黄金律".
- Fermi's_golden_rule label "费米黄金定则".
- Fermi's_golden_rule sameAs Fermis_Goldene_Regel.
- Fermi's_golden_rule sameAs Regla_de_oro_de_Fermi.
- Fermi's_golden_rule sameAs Règle_d'or_de_Fermi.
- Fermi's_golden_rule sameAs Regola_d'oro_di_Fermi.
- Fermi's_golden_rule sameAs フェルミの黄金律.
- Fermi's_golden_rule sameAs 페르미_황금률.
- Fermi's_golden_rule sameAs Fermi's_gulden_regel.
- Fermi's_golden_rule sameAs Złota_reguła_Fermiego.
- Fermi's_golden_rule sameAs Regra_de_ouro_de_Fermi.
- Fermi's_golden_rule sameAs m.03q6l0.
- Fermi's_golden_rule sameAs Q1073295.
- Fermi's_golden_rule sameAs Q1073295.
- Fermi's_golden_rule sameAs Fermi's_golden_rule.
- Fermi's_golden_rule wasDerivedFrom Fermi's_golden_rule?oldid=599759336.
- Fermi's_golden_rule isPrimaryTopicOf Fermi's_golden_rule.