Enhanced quantum state transfer: Circumventing quantum chaotic behavior

• Published in: arXiv.org 2024-02
• Main Authors: Liang Xiang, Chen, Jiachen, Zhu, Zitian, Song, Zixuan, Bao, Zehang, Zhu, Xuhao, Jin, Feitong, Wang, Ke, Xu, Shibo, Zou, Yiren, Li, Hekang, Wang, Zhen, Song, Chao, Yue, Alexander, Partridge, Justine, Guo, Qiujiang, Mondaini, Rubem, Wang, H, Scalettar, Richard T
• Format: Article
• Language: English
• Subjects: Circuits; Communication; Entangled states; Excitation; Information transfer; Quantum computing; Quantum entanglement; Quantum phenomena; Qubits (quantum computing)
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2402.00936

The ability to realize high-fidelity quantum communication is one of the many facets required to build generic quantum computing devices. In addition to quantum processing, sensing, and storage, transferring the resulting quantum states demands a careful design that finds no parallel in classical communication. Existing experimental demonstrations of quantum information transfer in solid-state quantum systems are largely confined to small chains with few qubits, often relying upon non-generic schemes. Here, by using a large-scale superconducting quantum circuit featuring thirty-six tunable qubits, accompanied by general optimization procedures deeply rooted in overcoming quantum chaotic behavior, we demonstrate a scalable protocol for transferring few-particle quantum states in a two-dimensional quantum network. These include single-qubit excitation and also two-qubit entangled states, and two excitations for which many-body effects are present. Our approach, combined with the quantum circuit's versatility, paves the way to short-distance quantum communication for connecting distributed quantum processors or registers, even if hampered by inherent imperfections in actual quantum devices.