efoldとは 意味・読み方・使い方

発音

• (General American) IPA: /ˈiːfoʊld/
• (Received Pronunciation) IPA: /ˈiːfəʊld/
• (New Zealand, General Australian) IPA: /ˈiːfaʉld/

形容詞

e-fold (not comparable)

1. (sciences) Multiplied by e.

   Thus, over the scale time, there is an e-fold likelihood of increase as compared to decrease.

2. (sciences) Conferring multiplication by e.

   So while some vertices have two children and others three, in the long run we can expect e-fold branching.

副詞

e-fold (not comparable)

1. (sciences) e times.

名詞

e-fold (plural e-folds)

1. (sciences) A multiplication by a power of e.
   • 2013, Anna Iijas, Abraham Loeb, Paul Steinhardt, “Inflationary Paradigm in trouble after Planck 2013”, in Phys. Lett. B‎, volume 723, numbers 4–5, →Bibcode, →DOI, page 262:

     An obvious difference between plateau-like models like this and the simplest inflationary models, like ${\displaystyle V(\phi )=\lambda \phi ^{4}}$, is that the simplest models require only one parameter and absolutely no tuning of parameters to obtain 60 or more e-folds of inflation, while the plateau-like models require three or more parameters and must be fine-tuned to obtain even a minimal amount of inflation.