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THU: Thursday Contributed Sessions
THU 1: Fault-Tolerant Quantum Computing: Contributed Session (Quantum Error Correction)
THU 1.4: Talk
Thursday, September 11, 2025, 15:00–15:15, ZHG001
Measurement-free quantum error correction optimized for biased noise — •Katharina Brechtelsbauer1, Friederike Butt2,3, David F. Locher2,3, Santiago Higuera Quintero1, Sebastian Weber1, Markus Müller2,3, and Hans Peter Büchler1 — 1Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Institute for Quantum Information, RWTH Aachen University, Aachen, Germany — 3Institute for Theoretical Nanoelectronics (PGI-2), Forschungszentrum Jülich, Jülich, Germany
In this work, we derive optimized measurement-free protocols for quantum error correction and the implemen- tation of a universal gate set optimized for an error model that is noise biased . The noise bias is adapted for neutral atom platforms, where two- and multi-qubit gates are realized with Rydberg interactions and are thus expected to be the dominating source of noise. Careful design of the gates allows to further reduce the noise model to Pauli-Z errors. In addition, the presented circuits are robust to arbitrary single-qubit gate errors, and we demonstrate that the break-even point can be significantly improved compared to fully fault-tolerant measurement-free schemes. The obtained logical qubits with their suppressed error rates on logical gate operations can then be used as building blocks in a first step of error correction in order to push the effective error rates below the threshold of a fully fault-tolerant and scalable quantum error correction scheme.
Keywords: Quantum error correction; Quantum computing; Rydberg atoms