Hopfield may refer to: A field used for cultivating hops Hopfield net, a type of neural network John Joseph Hopfield (born 1933), American biologist and physicist, inventor of the Hopfield net John J. Hopfield (spectroscopist) (1891–1953), American spectroscopist, with several eponymous spectral details: Hopfield bands, one of the important molecular oxygen absorption bands Lyman–Birge–Hopfield bands (LBH bands), one of the important molecular nitrogen absorption bands Hopfield continuum, a band in the emission spectrum of helium
See also Adventure in the Hopfields, a 1954 black and white short (60 min) film, directed by John Guillermin and written by John Cresswell, thought to have been lost until 2002 when an American film fan found a copy in a rubbish skip outside a Chicago television studio