40,000 qubits in a single fridge!

But zero dragons...

¹

Why on Earth is The Quantum Dragon trying to squeeze himself into a fridge? He obviously can’t fit. Anyone can see that.

I’ll let you in on a little secret: he’s trying to figure out how Delft Circuits does it.

Delft Circuits is making advanced cabling and connectors for superconducting quantum computer cryogenics systems. A recent announcement mentioned that this will allow us to squeeze thousands of qubits into a single fridge.

Normally, that would be exciting. After all, we don’t have thousands of qubits in a single fridge. Heck, we don’t have thousands of qubits. But you need to maintain your composure until you see the roadmap. The roadmap goes to 40,000 qubits in a single fridge by 2029.

FORTY THOUSAND QUBITS IN A SINGLE FRIDGE

And that’s why The Quantum Dragon won’t leave the kitchen.

But not all superconducting qubits are the same. How might this affect cat qubits, GKP qubits, etc.?

The roadmap is actually to 96,000 channels. While some superconducting qubits only need one, two, or three channels, cat qubits currently require seven. Therefore, some superconducting qubits may be able to exceed 40,000 in one fridge, while other superconducting qubits will be more restricted. The target of 40,000 represents an average of about 2.5 channels per qubit. However, fewer cat and GKP qubits will be required compared to transmons, for example, so squeezing 10,000+ of either into one fridge should actually be a much bigger deal.

Those spoiled groceries cost money, by the way, but don’t worry about me. The Quantum Dragon is insisting he’ll pay me back.

Filed under: Quantum Computing • Superconducting Qubits • Cryogenics • Delft Circuits • Quantum Hardware • Quantum Scalability

1. Image generated and edited by Microsoft Copilot, OpenAI’s DALL·E, and Google’s language model AI.