Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 71: Cavity QED and QED II

Q 71.2: Talk

Friday, March 6, 2026, 11:15–11:30, P 4

Cavity-assisted defect removal in a small-scale toric code — •Junyi Zhang and Francesco Petiziol — Technische Universität Berlin

We design and investigate a dissipative defect-removal mechanism in a small scale toric code coupled to a leaky cavity. The model considered includes coherent perturbations that delocalize either electric or magnetic anyon pairs, producing superpositions of error configurations with respect to information encoded in the ground state. By combining analytical and numerical tools, we study how coherent anyon delocalization competes with cavity-assisted dissipation engineering in determining cooling efficiency and steady state behavior, for different coupling schemes. This analysis provides insights into the potential and fundamental limitations of cavity-assisted cooling as a passive error suppression pathway in a topologically ordered system.

Keywords: Toric Code; Cavity QED; Quantum Error Correction; Quantum Memories; Quantum Information