TL;DR: Quantinuum has demonstrated 20+ logical qubits with active error correction on their H2 trapped-ion processor. This is the largest number of logical qubits demonstrated on any quantum computer. The hi
Quantinuum has demonstrated 20+ logical qubits with active error correction on their H2 trapped-ion processor. This is the largest number of logical qubits demonstrated on any quantum computer. The high native gate fidelity (99.8%) and all-to-all connectivity of trapped ions make them particularly well-suited for error correction experiments. These demonstrations are key milestones on the path to fault-tolerant quantum computing.
Type
Logical qubit experiments
Overhead
20+ logical qubits demonstrated on H2 hardware
Threshold
Using H2's 99.8% gate fidelity
Key Result
20+ logical qubits with error correction on trapped-ion system