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In nature, everything is cyclical: hares multiplied — foxes thrived — hares ran out — foxes died off — and the cycle repeated. This 'predator-prey' model was invented a century ago, and it works everywhere: from chemistry to economics. Physicists have now brought this storyline to the atomic stage. They built a lattice of hydrogen atoms and inflated them to giant sizes — into a Rydberg state, named after Johannes Rydberg. These giant atoms sense each other from afar and act out the same drama: some states become 'predators,' others 'prey.' Quantum laws don't break but rather reinforce the cycle. A natural rhythm emerges, resistant to disturbances. Stray quantum jumps only add a light ripple that smoothes out when there are many atoms — like noise in a large orchestra.

This is how scientists harness non-equilibrium quantum effects for the ultrafast simulators of the future.