LDPC-cat codes for low-overhead quantum computing in 2D.

ABSTRACT: The main obstacle to large scale quantum computing are the errors present in every physical qubit realization. Correcting these errors requires a large number of additional qubits. Two main avenues to reduce this overhead are (i) low-density parity check (LDPC) codes requiring very few additional qubits to correct errors (ii) cat qubits where bit-flip errors are exponentially suppressed by design. In this work, we combine both approaches to obtain an extremely low overhead architecture. Assuming a physical phase-flip error probability ϵ ≈ 0.1% per qubit and operation, one hundred logical qubits can be implemented on a 758 cat qubit chip, with a total logical error probability per cycle and per logical qubit ϵ_L ≤ 10^-8. Our architecture also features two major advantage

SUBMITTER: Ruiz D 

PROVIDER: S-EPMC11762751 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature