Hans Primas formulates in Chemistry, Quantum Mechanics and Reductionism, the following basic questions left without answers in textbook quantum mechanics:
- Do isolated quantal systems exist at all?
- Is the Pauli Principle a universal and inviolable fact of nature?
- Does quantum mechanics apply to large molecular systems?
- Is the superposition principle universally valid?
- Why do so many stationary states not exist?
- Why are macroscopic bodies localised?
- Why does quantum mechanics fail to account for chemical systematics?
- Why can approximations be better than the exact solutions?
- Why is the Born-Oppenheimer picture so successful?
- Is temperature an observable?
- $\psi (x_1,....,x_N,t)$ depending on $3N$ space coordinates and time,
- satsifying a linear scalar wave equation in $3N$ space dimensions and time,
Hans Primas gives the following devastating verdict:
- There is no general agreement about the referent (physical meaning) of pioneer (textbook) quantum mechanics.
- Pioneer quantum mechanics has an agonising shortcoming: It cannot describe classical systems.
- From a fundamental point of view the only adequate interpretation of quantum mechanics is an ontic (realistic) interpretation.... Bohr's epistemic interpretation expresses merely states of knowledge and misses the point of genuine scientific inquiry...If we assume that pioneer quantum mechanics is a universal theory of molecular matter, then an ontic interpretation of this theory is impossible.
- The Bohr Copenhagen (textbook) interpretation is not acceptable as a fundamental theory of matter.