
The Smallest Active Particle Gets Its Push From Quantum Spin
A cold cesium atom gets a temporary burst of motion when quantum spin energy becomes kinetic energy in collisions with rubidium.

A cold cesium atom gets a temporary burst of motion when quantum spin energy becomes kinetic energy in collisions with rubidium.

A curved microfluidic chip uses collective motion to separate active particles, turning a physics principle into a continuous-flow sorter.