(physics) to treat a quantum system in terms of classical statistical mechanics

classicism

The process or result of classicizing.

plural of classicality

The quality of being classical.

plural of classical

(countable) One that is classical in some way; for example, a classical economist. / Short for classical music. / (chess) Short for classical chess.

Of or relating to the first class or rank, especially in literature or art. / Exemplary of a particular style; defining a class/category; typical. / Exhibiting timeless quality and excellence.

plural of classicalism

In a classical manner; according to the manner of classical authors. / In the manner of classes; according to a regular order of classes or sets.