Group seminar at MPQ and Zoom: Towards modular fault-tolerant neutral atom quantum computers
 

Josiah Sinclair, University of Wisconsin-Madison, USA
Group seminar at MPQ lecture hall and Zoom
Thursday, 23 April 2026, 09:00am (MEZ)

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surface code logical qubits with noisy links [1, 2], leveraging loss errors in fault-tolerant algorithms [3], and some unpublished work on connecting interfacing XZZX logical qubits via interfaces with biased noise. 

1. 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
2. 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.
3. G. Baranes, C. Madelyn, J. P. Bonilla Ataides, D. Bluvstein, J. Sinclair, V. Vuletić, H. Zhou, and M. D. Lukin. “Leveraging Qubit Loss Detection in Fault-Tolerant Quantum Algorithms,” Phys. Rev. X 16, 011002 (2025).