Imagine a physicist observing a quantum system whose behavior is akin to a coin toss: it could come up heads or tails. They perform the quantum coin toss and see heads. Could they be certain that ...

What follows is a fairly complete transcript of a discussion about quantum physics on May 19, 1994, the last day of a workshop in Santa Fe, N.M. It begins with some technical issues, posed by John ...

Part of our International Year of Quantum Science and Technology coverage For the International Year of Quantum Science and Technology, Physics World is shining a spotlight on quantum effects so ...