There is no measurement that can directly observe the wave function of a quantum mechanical system, but the wave function is still enormously useful as its (complex) square represents the probability ...

Even given a set of possible quantum states for our cosmos, it's impossible for us to determine which one of them is correct ...

Quantum mechanics revolutionizes our understanding of the classical world. A team of Spanish researchers offers a new perspective on the link between quantum and classical. The foundations of quantum ...