But physically, the wave function is problematic. It is often possible to figure out the physical meaning of a symbol in an equation by looking at the physical units you would use to measure it.

At the heart of the issue are the contrasting ideas on the very nature of quantum mechanics itself. In their paper, the British physicists contend that the wave function is not just a tool that ...

For nearly a century physicists have argued about whether the wave function is a real part of the world or just a mathematical tool. Now, the first experiment in years to draw a line in the ...