The central challenge to harnessing large-scale quantum entanglement is its fragility to errors. Quantum error correction offers a promising route to suppressing errors, but because many qubits are required for each error-corrected qubit, the number of physical qubits needed for useful applications is very large. As neutral-atom systems approach practical size limits, true scalability will require connecting arrays in a modular architecture. My group is pursuing this goal by combining large neutral-atom processors containing multiple logical qubits with short-range, high-speed, cavity-based photonic interconnects to create an intrinsically scalable platform for quantum information science. In this talk, I will describe our experimental plans, and present some of my previous theoretical results which shape this program including my work on connecting surface code logical qubits with noisy links [1, 2], and some unpublished work on connecting interfacing XZZX logical qubits via interfaces with biased noise.

J. Sinclair, J. Ramette, B. Grinkemeyer, D. Bluvstein, M.D. Lukin, V. Vuletić. “Fault-tolerant optical interconnects for neutral-atom arrays,” Phys. Rev. Research 7, 013313

J. Ramette, J. Sinclair, N.P. Breuckmann, and V. Vuletić. Fault-tolerant connection of error-corrected qubits with noisy links. npj Quantum Inf 10, 58 (2024).
doi.org/10.1038/s41534-024-00855-4.