qSIEVE: Efficient qLDPC Memory via Systolic Movement in Atom Arrays

Understand

As quantum machines have scaled up in their number of qubits, significant research has turned towards increasing their fidelity with quantum error correction codes.

• Although promising results have been shown with the surface code, which only requires near-neighbor connections between qubits, the high qubit overhead of such local codes promises to be problematic.
• Consequently, recent work has explored non-local quantum LDPC (qLDPC) codes, which have good asymptotic encoding rates.
• Despite theoretical progress, hardware implementations of these codes has been a longstanding challenge.