John Timmer reports via Ars Technica: Today, a startup called Atom Computing announced that it has been doing internal testing of a 1,180 qubit quantum computer and will be making it available to customers next year. The system represents a major step forward for the company, which had only built one prior system based on neutral atom qubits -- a system that operated using only 100 qubits. The error rate for individual qubit operations is high enough that it won't be possible to run an algorithm that relies on the full qubit count without it failing due to an error. But it does back up the company's claims that its technology can scale rapidly and provides a testbed for work on quantum error correction. And, for smaller algorithms, the company says it'll simply run multiple instances in parallel to boost the chance of returning the right answer. [...]

Atom Computing is now using the system internally and plans to open it up for public use next year. The system has moved from a 10x10 grid to a 35x35 grid, bringing the potential sites for atoms up to 1,225. So far, testing has taken place with up to 1,180 atoms present, making it the largest machine that anyone has publicly acknowledged (at least in terms of qubit count). The qubits are housed in a 12x5 foot box that contains the lasers and optics, along with the vacuum system and a bit of unused space -- Atom CEO Rob Hayes quipped that "there's a lot of air inside that box." It does not, however, contain the computer hardware that controls the system and its operations. The grid of atoms it's used to create, by contrast, is only about 100 microns per side, so it won't strain the hardware to keep increasing the qubit count.