Curie's principle, or Curie's symmetry principle, is a maxim about cause and effect formulated by Pierre Curie in 1894: [1]
the symmetries of the causes are to be found in the effects. [2] [3] [4]
The idea was based on the ideas of Franz Ernst Neumann and Bernhard Minnigerode. Thus, it is sometimes known as the Neumann–Minnigerode–Curie principle. [5]
Later physicists have interpreted Curie's principle in the context of thermodynamics. Dynamics close to equilibrium are described by a set of transport coefficients whose symmetries must match the symmetries of the system, according to Curie's principle. [6]