Many physicists believe quantum “measurements” are just an approximation to underlying unitary processes. See https://news.ycombinator.com/item?id=17894779 http

Many physicists believe quantum “measurements” are just an approximation to underlying unitary processes. See https://news.ycombinator.com/item?id=17894779 https://news.ycombinator.com/item?id=17894779 for more discussion. See also https://en.wikipedia.org/wiki/Quantum_decoherence https://en.wikipedia.org/wiki/Quantum_decoherence.