The Box That Still Holds Energy: Zero-Point Secrets of the Quantum Vacuum

Even a truly empty box still contains zero-point energy—the ground-state energy of quantum fields and particles—so the vacuum is energy-filled and can influence reality (as seen in effects like Casimir). Depending on interpretation, these fluctuations may appear as motion or be purely nonclassical, but the takeaway is that the vacuum is ‘nothing infused with the potential to be anything.’