The concept was described by Erwin Schrödinger in 1935. He conceived of it as a thought experiment to illustrate (or ridicule) a theory, associated with Niels Bohr, according to which the quantum state of a particle could not be known until an observation was made; prior to that it had to be described physically in terms of all possible states
- The process of decoherence seems to play a role in deciding how acceptable classical histories can be singled out. Our Universe, it seems, behaves like a big Schrödinger's cat.
- We are intended to regard Schrödinger's cat, for example, as alive, relative to the uranium atoms remaining intact, during the critical interval, and dead relative to there having occurred, within this interval, at least one decay.
- The mythical 'Schrödinger's cat' remains both dead and alive in its closed box until externally examined.
Definition of Schrödinger's cat in:
- The US English dictionary