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No — not all of them. Superconducting quantum computers require dilution refrigerators operating near absolute zero, but neutral-atom quantum computers like QuEra's run at room temperature with no cryogenic infrastructure at all. The qubits themselves — individual atoms held by laser tweezers in a vacuum chamber — are laser-cooled to microkelvin temperatures, but the machine around them is standard room-temperature equipment.
Why do some quantum computers need cryogenics?
It depends on the qubit. Superconducting qubits are electrical circuits that only exhibit quantum behavior when cooled to around 10-20 millikelvin, which requires large dilution refrigerators, specialized facilities, and significant power and space. Photonic approaches typically need cryogenically cooled single-photon detectors.
Neutral-atom systems take a different path. The qubits are rubidium atoms suspended in ultra-high vacuum and manipulated with lasers. Laser cooling brings the atoms themselves to microkelvin temperatures — colder than any refrigerator could achieve — but this happens optically, inside a small vacuum cell, without any cryogenic plant. This is why neutral atoms are sometimes called "cold atoms" even though the machine operates in a normal room.
What does this mean for power and footprint?
The practical differences are significant. QuEra's Libra system — a fault-tolerant quantum computer with 256 logical qubits launching in 2028 — will consume less than 40 kilowatts, which is less than a single AI server rack, and fit in under 1,000 square feet. QuEra's current Aquila system draws under 12 kWh. Analyst firm Gartner highlighted this advantage, noting QuEra's technology requires significantly less power and space than superconducting or photonic computers.
Can a quantum computer really go in a normal data center?
Yes — and this is one of the most underappreciated advantages of the neutral-atom approach. Because there's no cryogenic infrastructure, no special foundations, and modest power requirements, neutral-atom systems can be deployed directly into existing data centers and HPC facilities. QuEra has already delivered an on-premises Gemini system to AIST in Japan, and partnerships with NVIDIA, Dell, and HPE are focused on integrating quantum processors alongside classical supercomputers, where hybrid quantum-classical workflows run side by side.
For organizations planning quantum adoption, this changes the calculus: hosting a fault-tolerant quantum computer becomes an IT-infrastructure decision, not a facilities construction project.
