High-Fidelity Quantum State Transfer in Multimode Resonators via Tunable Pulses

Yuanning Chen; Xinxin Yang; Simon Gröblacher

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arXiv · 2603.25264

High-Fidelity Quantum State Transfer in Multimode Resonators via Tunable Pulses

Yuanning Chen·Xinxin Yang·Simon Gröblacher

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Abstract

Quantum state transfer between distant nodes is essential for distributed quantum information processing. Existing protocols are typically optimized for specific coupling regimes, such as adiabatic dark-state transfer in the single-mode limit and pitch-and-catch schemes in the multimode regime, leaving the crossover between them without a simple and unified control strategy. Here we identify a minimal two-parameter control framework that enables high-fidelity quantum state transfer across this single-mode-to-multimode crossover in a multimode quantum channel. Using a pulse-shaped pitch-and-catch protocol controlled only by the pulse ramp rate and the emission-absorption delay, we achieve transfer fidelities exceeding 99.9%, extending pitch-and-catch protocols toward the single-mode limit without requiring dark-state protection or complex pulse design. We further demonstrate robustness against dissipation, disorder, detuning, and imperfect initialization under experimentally realistic conditions. These results provide a simple and broadly applicable framework for state transfer in multimode quantum channels, with relevance to circuit-QED and hybrid quantum-acoustic systems.

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Yuanning Chen, Xinxin Yang, Simon Gröblacher. 2026-03-26. High-Fidelity Quantum State Transfer in Multimode Resonators via Tunable Pulses. https://arxiv.org/abs/2603.25264

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