Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 10: Spin-Dependent Phenomena in 2D (joint session MA/HL)

HL 10.7: Vortrag

Montag, 17. März 2025, 16:30–16:45, H19

Realizing Spin-3/2 AKLT State for Quantum Computation with Tetrapod Architectures — •Claire Benjamin¹, László Oroszlány^1,2, Dániel Varjas³, and Gábor Széchenyi¹ — ¹Department of Physics of Complex Systems, Eötvös University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary — ²Wigner Research Centre for Physics, Konkoly-Thege M. út 29-33, H-1121 Budapest, Hungary — ³Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Muegyetem rkp. 3., H-1111 Budapest, Hungary

Using a novel tetrapod (5-site cluster) architecture, we implement spin-3/2 degrees of freedom in a semiconductor quantum bit platform. This framework enables us to construct a tunable artificial spin system that can realize the two-dimensional Affleck-Kennedy-Lieb-Tasaki (AKLT) state on a honeycomb lattice, known to be a universal resource for measurement-based quantum computation. We assess the model's robustness and feasibility for measurement based quantum computing using semi-analytic perturbation theory and numerical calculations.

Keywords: Measurement Based Quantum Computing; AKLT States; Hubbard Model