Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 79: Cavity QED and QED III
Q 79.2: Talk
Friday, March 6, 2026, 14:45–15:00, P 4
Noise-protected state transfer between distant nodes in a quantum network — •Syeda Aliya Batool1, Iñigo Arrazola2, and Peter Rabl1 — 1Walther-Meißner-Institut, 85748 Garching, Germany — 2Institute of Theoretical Physics-IFT, Madrid, Spain
Low-frequency noise represents a major source of decoherence in cavity QED systems, significantly limiting the fidelity of quantum state transfer and, consequently, the reliability of long-distance quantum communication protocols. To address this challenge, we investigate two complementary noise-mitigation strategies: continuous dynamical decoupling, which implements a continuous spin-echo effect through strong qubit driving, and pulsed dynamical decoupling, which applies sequences of control pulses to suppress low-frequency fluctuations. These techniques target different experimental regimes, and together they offer a universal solution for mitigating low-frequency noise across a wide range of system parameters. We analyze their effectiveness, demonstrating that they can significantly enhance the robustness of qubit-photon interfaces while preserving coherent photon-mediated state transfer. Our results provide practical guidance for implementing noise-resilient qubit-photon interfaces, laying a foundation for secure and high-fidelity quantum information transfer in long-distance quantum networks.
Keywords: Low-frequency; decoherence; communication; quantum networks; noise-mitigation