The implementation of quantum theory was presented to our macroscopic world by the “cat” thought experiment (Gedanken experiment) suggested by Erwin Schrödinger in 1935. In the same way, Pavlov’s dog with its learning by conditioned reflexes was a similar symbol of Newtonian physics representing the deterministic view, and the cat as an animal became the symbol of quantum mechanics. Thought experiments are a common technique in physics. Before everything, it is important to see whether the experiment can be carried out at all, and it is unimportant how complex the relevant techniques to be used in the experiment. This is because there is only a design and a thought experiment. Imagination and materials are unlimited, and the only constraining factors are the laws of mathematics and physics. If you feel sorry for the cat, you might prefer the experiment suggested by Einstein, which uses a box containing a bomb, a photon, an electron, or playing cards. In this article, we reviewed possible solutions of the quantum measurement problem or quantum wavefunction collapse.

Schrödinger’s cat, measurement problem, wavefunction collapse