Why Most Quantum Computers Need to Be Colder Than Space - CNET

Most quantum computers operate at temperatures below 1 Kelvin—colder than the Boomerang Nebula, the universe’s coldest known natural place—to prevent qubit interference from heat. The iconic gold chandelier-like structures in quantum labs are dilution refrigerators, not the computers themselves; the actual quantum processors sit at their ultra-cold base. Qubits, whether atomic or engineered circuits, require near-absolute-zero conditions because even minimal heat disrupts their fragile quantum states, causing computational errors. Bluefors, a leading manufacturer, specializes in these refrigerators, using helium isotopes to achieve extreme cooling via dilution refrigeration, a critical enabler for quantum computing. Without such cooling, quantum systems would fail to maintain coherence, undermining their potential for breakthroughs in cryptography, materials science, and optimization.