egentilstand

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Danish

Etymology

egen- +‎ tilstand

Noun

egentilstand

(physics) eigenstate
- 1981, Jens Ulstrup, Kemiske elementarprocesser i kondenserede medier:
  ... sandsynligheden pr. tidsenhed for, at systemet overgår fra begyndelsestilstanden a (egentilstand af H_i) til sluttilstanden b (egentilstand af H_f) ...
  ... the probability per unit time of the system transitioning from the initial state a (eigenstate of H_i) to the final state b (eigenstate of H_f) ...
- 1985, Fysisk tidsskrift:
  Denne foton-tilstand, som kaldes den kohærente, kan matematisk karakteriseres ved, at den er en egentilstand for den såkaldte foton annihilations operator ${\hat {a}}$ med egenværdi $\alpha$ .
  This photonic state, which is called the coherent one, may mathematically characterized by being an eigenstate of the so-called photon annihilation operator ${\hat {a}}$ with eigenvalue $\alpha$ .
- 1981, Jan Faye, Et naturfilosofisk essay om tid og kausalitet:
  Hvad der derfor synes at være brug for, for at vi bliver i stand til at forstå sammenhængen mellem energitilstande og tidsretning i kvantemekanikken er en højereordens "time sense"-operator, således at +H og -H begge vil være egentilstande af denne operator.
  What therefore seems to be needed to enable us to understand the relation between energy states and the direction of time in quantum mechanics is a higher-order "time sense"-operator, such that both +H and -H will be eigenstates of this operator.

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