Helium-3 for Quantum Computing

Superconducting quantum computers run at millikelvin temperatures reached with helium-3 dilution refrigeration; He-3 supply constrains the field.

The coldest place in the machine

Superconducting quantum processors must be cooled to roughly 10 millikelvin — hundredths of a degree above absolute zero — to keep qubits coherent. The only practical way to reach and hold that temperature continuously is a dilution refrigerator, and dilution refrigerators run on helium-3.

The cooling exploits the physics of a helium-3/helium-4 mixture. Below about 0.87 K the mixture separates into a helium-3-rich phase and a dilute phase; forcing helium-3 across that phase boundary absorbs heat, much as evaporation cools a liquid. This provides continuous cooling power at millikelvin temperatures that no other technique matches in a practical package.

Why supply is the bottleneck

• Every dilution fridge needs a helium-3 charge (tens of liters STP or more)
• Larger quantum systems and more dilution units multiply demand
• Global helium-3 supply is only a few kg/yr and largely allocated
• Detection and defense uses compete for the same supply

Hyperion's relevance

At a ~1.97 kg/yr coproduct rate, a breeder foundry is a source on the scale of the entire existing market. That is why helium-3 offtake for quantum and cryogenic customers is part of Hyperion's product strategy. The point is strategic availability of a scarce enabling material, described here in physical terms only.

This page describes a design-and-simulation study, not a built machine. Construction begins Q2 2027; first-of-a-kind (FOAK) first tritium is targeted near 2030. No net-gain claim is made before FOAK.