Abstract
Normal-mode splitting reveals coherent cavity--magnon hybridization but does not certify finite-time quantum-state transfer. We describe quantum transfer in a passive, linear cavity--magnon system coupled to thermal reservoirs as a thermal-loss channel specified by its coherent transmissivity $η$ and output-referred thermal population $ν$. For single-rail qubits, we calculate the phase-corrected average fidelity and compare it with the deterministic measure-and-prepare benchmark of $2/3$. A Bell pair shared by the cavity and an isolated reference retains reference--magnon entanglement if and only if $η>ν$. An input squeezed vacuum of strength $r$ yields sub-vacuum magnon fluctuations if and only if $ν<η(1-e^{-2r})/2$. When the initial magnon and both reservoirs have the same occupation, an analytically determined peak-transmissivity time optimizes all three tasks. These task-dependent benchmarks show that a conventional linewidth-based strong-coupling criterion does not guarantee quantum-transfer performance. Conversely, entanglement or squeezing can survive below that spectroscopic reference when the added noise is sufficiently low. These benchmarks provide quantitative targets for transfer timing and thermal-noise control in intracavity-to-magnon quantum interfaces.
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Cite this article
APA 7
Xinyi, H., Xiang, Z., & Dongxing, Z. (2026). Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer. https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer
MLA 9
Xinyi, Huang, et al. "Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer." https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer.
Chicago (author–date)
Xinyi, Huang, Zhang Xiang, and Zhao Dongxing. 2026. "Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer." https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer.
Harvard
Xinyi, H., Xiang, Z. and Dongxing, Z. (2026) 'Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer', Available at: https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer.
Vancouver
Xinyi H, Xiang Z, Dongxing Z. Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer. https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer
IEEE
H. Xinyi, Z. Xiang, and Z. Dongxing, "Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer," https://omanscience.com/en/articles/beyond-spectroscopic-strong-coupling-operational-benchmarks-for-cavity-to-magnon-quantum-transfer.