IQIM Postdoctoral and Graduate Student Seminar

Abstract: Quantum error correction (QEC) is believed to be essential for large-scale quantum computation. However, due to the complexity of operating on encoded "logical" qubits, understanding the physical principles for designing fault-tolerant quantum architectures is an outstanding scientific challenge. In this talk, I will describe recent experimental and theoretical advances towards this goal. Using reconfigurable arrays of neutral atoms, we realize early fault-tolerant quantum algorithms using transversal gates and logical-level control. We then examine the minimal requirements for fault-tolerance in such algorithms, finding that correlated decoding of the logical qubits enables the syndrome extraction overhead to be reduced by a factor of the code distance. By decoding only relevant logical operator products in this setting, we transform the correlated decoding problem to closely resemble that of a single logical qubit propagating through time, enabling the application of fast and accurate matching decoders. Finally, we leverage these developments in experiments exploring below-threshold error correction, simplified fault-tolerant, universal logic, and deep-circuit computation. These results establish foundations for scalable, universal error-corrected processing in neutral atom systems and enable practical resource reductions by over an order of magnitude.

Following the talk, lunch will be provided on the lawn outside East Bridge.