Quantum 2025 – wissenschaftliches Programm
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THU: Thursday Contributed Sessions
THU 1: Fault-Tolerant Quantum Computing: Contributed Session (Quantum Error Correction)
THU 1.3: Vortrag
Donnerstag, 11. September 2025, 14:45–15:00, ZHG001
Lattice surgery in near term experimental planar architectures — •Lukas Bödeker1,2, Áron Márton1,2, Luis Colmenárez1,2, Ilya Besedin3,4,5, Michael Kerschbaum3,4,5, Jonathan Knoll3, Ian Hesner3,4,5, Nathan Lacroix3,5, Luca Hofele3,5, Christoph Hellings3,5, François Swiadek3,5, Alexander Flasby3,4,5, Mohsen Bahrami Panah3,4,5, Dante Colao Zanuz3,4,5, Andreas Wallraff3,4,5, and Markus Müller1,2 — 1Institute for Theoretical Nanoelectronics (PGI-2), Forschungszentrum Jülich — 2Institute for Quantum Information, RWTH Aachen University — 3Department of Physics, ETH Zürich — 4ETH Zürich - PSI Quantum Computing Hub, Paul Scherrer Institute, Villigen — 5Quantum Center, ETH Zürich
On the pathway to construct a scalable and fault-tolerantly error-corrected quantum computer, the question of implementing a fault-tolerant gate set must be addressed. For experimental platforms with planar design and limited qubit connectivity, the surface code – complemented with lattice surgery – has emerged as a leading candidate for delivering first proof-of-principle implementations of foundational building blocks. We demonstrate one early building block by creating entanglement between two repetition codes in a superconducting qubit architecture [1]. This is achieved by splitting a distance-three surface code using lattice surgery. Building on this result, we further investigate, through detailed simulations, the realistic performance of teleporting a logical surface-code state [2]. In doing so, we explore optimized lattice surgery protocols that preserve fault tolerance and are compatible with near-term superconducting qubit architectures.
[1] I. Besedin, M. Kerschbaum, J. Knoll, I. Hesner, L. Bödeker et al., "Realizing lattice surgery on two distance-three repetition codes with superconducting qubits", arXiv:2501.04612 (2025).
[2] L.Bödeker et al., "Lattice surgery for near term experimental entanglement creation in planar architectures", In preparation (2025).
Keywords: Quantum error correction; Fault tolerance; Lattice surgery; Logical teleportation; Surface code