On Oct. 7, the Royal Swedish Academy of Sciences announced it awarded this year's prize to John Clarke, Michel Devoret, and John Martinis. A major question in physics is the maximum size of a system that can demonstrate quantum mechanical effects, the committee stated in a press release. This year's Nobel Prize laureates conducted experiments with an electrical circuit in which they demonstrated both quantum mechanical tunnelling and quantised energy levels in a system big enough to be held in the hand.