Ten reasons why a thermalized system cannot be described by a many-particle wave function

摘要: It is widely believed that the underlying reality behind statistical mechanics a deterministic and unitary time evolution of many-particle wave function, even though this in conflict with irreversible, stochastic nature mechanics. The usual attempts to resolve for instance by appealing decoherence or eigenstate thermalization are riddled problems. This paper considers theoretical physics thermalized systems as it done practise shows all approaches presuppose some form limits linear superposition evolution. These considerations include, among others, classical limit, extensivity, concepts entropy equilibrium, symmetry breaking phase transitions quantum measurement. As conclusion, argues irreversibility stochasticity should be taken true property nature. follows gas macroscopic number $N$ atoms thermal equilibrium best represented collection packets size order de Broglie length, which behave mechanically below scale but classically sufficiently far beyond scale. In particular, these must localize again after scattering events, requires indicates connection measurement process.