Fermi superfluidity

Fermi superfluidity occurs when particles known as fermions—which normally resist sharing the same state—pair up at very low temperatures, forming "Cooper pairs." These pairs act collectively as bosons, enabling them to flow without resistance, creating a superfluid. This phenomenon is similar to superconductivity in electrons, allowing frictionless movement. Fermi superfluidity is observed in systems like ultra-cold atomic gases and neutron stars, providing insight into quantum behaviors of matter under extreme conditions. Essentially, it’s a state where paired particles move seamlessly, highlighting quantum mechanics' remarkable effects on a macroscopic scale.