Hardware & Errors
QCCD Architecture
Quantum Charge-Coupled Device — a trapped-ion architecture that physically shuttles ions between trap zones to achieve flexible connectivity.
Definition
QCCD (Quantum Charge-Coupled Device) is a trapped-ion quantum computer architecture where ions can be physically moved between different zones of an ion trap, allowing the system to reconfigure which ions are positioned near each other — and therefore which qubits can interact — on demand.
Technical Definition
This architecture, used by companies like Quantinuum, contrasts with static linear ion chains by enabling effectively all-to-all connectivity at scale through physical ion transport, at the cost of additional time overhead for the shuttling operations themselves.
Visual Explanation: An Analogy
Think of QCCD like a train switching yard, where individual train cars (ions) can be moved between different tracks (trap zones) to be coupled with whichever other car they need to interact with next, rather than being permanently fixed in one position.
Real-World Use Cases
- Used in Quantinuum's H-Series trapped-ion processors, including the H2 system
- Enables some of the highest published two-qubit gate fidelities of any quantum hardware platform