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Trapped Ion Quantum Computing Superconducting Qubits

Giant-atom quantum acoustodynamics in hybrid superconducting-phononic integrated circuits

arXiv
Authors: Lintao Xiao, Bo Zhang, Yu Zeng, Xiaoxuan Pan, Jia-Qi Wang, Ziyue Hua, Hongwei Huang, Yifang Xu, Guangming Xue, Haifeng Yu, Xin-Biao Xu, Weiting Wang, Chang-Ling Zou, Luyan Sun

Year

2025

Paper ID

5920

Status

Preprint

Abstract Read

~2 min

Abstract Words

94

Citations

N/A

Abstract

We demonstrate a giant atom by coupling a superconducting transmon qubit to a lithium niobate phononic waveguide at two points separated by about 600 acoustic wavelengths, with a propagation delay of 125 ns. The giant atom yields non-Markovian relaxation dynamics characterized by phonon backflow and a frequency-dependent effective decay rate varying four-fold over merely 4 MHz, corresponding to a Purcell factor exceeding 40. Exploiting this frequency-dependent dissipation, we prepare quantum superposition states with high purity. Our results establish phononic integrated circuits as a versatile platform for giant-atom physics, providing highly tunable quantum devices for advanced quantum information processing.

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  • We demonstrate a giant atom by coupling a superconducting transmon qubit to a lithium niobate phononic waveguide at two points separated by about 600 acoustic wavelengths, with...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2512.16582 [2] arXiv https://arxiv.org/abs/2512.16582 [3] Publisher https://arxiv.org/abs/2512.16582

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