Robert C. Richardson, a physicist who spent most of his career at Cornell University, died in Ithaca, New York, on February 19, 2013. Born in Washington, D.C., on June 26, 1937, Richardson is best remembered for sharing the 1996 Nobel Prize in Physics. He won the award alongside colleagues Douglas Osheroff and David Lee. Their recognition came for uncovering superfluidity in helium-3 (3He).
Richardson earned his Ph.D. in physics from Duke University in Durham, North Carolina, in 1966. He joined the faculty at Cornell University the following year, in 1967. By 1990, he was serving as the director of the laboratory of atomic and solid-state physics. He held that position until 1996.
The breakthrough happened in 1972. Richardson and Lee were senior researchers at Cornell’s low-temperature lab. They were studying the properties of the helium-3 isotope. To do this, they cooled a sample to within a few thousandths of a degree of absolute zero, which is −273° C. While monitoring the sample’s internal pressure, graduate student Douglas Osheroff noticed something odd.
The pressure showed small, unexpected jumps.
“When a liquid becomes superfluid, its atoms lose their randomness and can flow in a coordinated manner.”
The team eventually figured out what the jumps meant. The helium-3 had undergone a phase transition to a state of superfluidity. In this state, the liquid behaves like a quantum mechanical miracle. The atoms stop moving randomly. They begin to flow in a coordinated manner.
Normal liquids have internal friction. Superfluid helium-3 does not. It flows without resistance. This is not just a curiosity. It is a window into the quantum world.
Why does this matter outside a lab? Because superfluid helium-3 allows scientists to study quantum mechanical effects directly. Previously, these effects could only be observed indirectly in invisible particles like molecules, atoms, and subatomic particles. Here, they appear in a macroscopic system. You can see it. You can measure it. It makes the invisible visible.
Richardson’s work changed how we understand matter at the extremes of cold. It remains a cornerstone of low-temperature physics.
