About
Atlantic Quantum was a US quantum hardware company building superconducting quantum computers using fluxonium qubits. Fluxonium is an alternative to the standard transmon qubit used by IBM and Google, offering longer coherence times and higher anharmonicity. Founded in 2022 as an MIT spinout and based in Cambridge, Massachusetts, the company raised more than $9M in seed funding and developed fluxonium-based processors aimed at better gate fidelity and longer T1 times, an approach that may enable more compact and fault-tolerant superconducting qubits. In October 2025, Google Quantum AI acquired Atlantic Quantum for an undisclosed price, gaining fluxonium qubit expertise and embedded cryogenic control technology relevant to scaling toward millions of qubits by 2029. Atlantic Quantum no longer operates as an independent entity. Its modular superconducting qubit technology, which integrates control circuitry within the cold stage and eliminates room-temperature wiring, was incorporated into Google's scalable quantum hardware roadmap.
Quantum Specifications
| Qubit Technology | Superconducting |
| Error Correction | Fluxonium |
| Quantum Focus | hardware |
