Quantum state transfer between superconducting cavities via exchange-free interactions

• DOI: 10.48550/arxiv.2408.14076
• Publication Date: 2024-11-26
• Authors: Jie Zhou; Ming Li; Weiting Wang; Weizhou Cai; Ziyue Hua; Yifang Xu; Xiaoxuan Pan; Guangming Xue; Hongyi Zhang; Yipu Song; Haifeng Yu; Chang-Ling Zou; Luyan Sun
• Keywords: 0301 basic medicine; Quantum Physics; 03 medical and health sciences; FOS: Physical sciences; Quantum Physics (quant-ph)

We propose and experimentally demonstrate a novel protocol for transferring quantum states between superconducting cavities using only continuous two-mode squeezing interactions, without exchange of photonic excitations between cavities. This approach conceptually resembles quantum teleportation, where quantum information is transferred between different nodes without directly transmitting carrier photons. In contrast to the discrete operations of entanglement and Bell-state measurement in teleportation, our scheme is symmetric and continuous. We experimentally realize coherent and bidirectional transfer of arbitrary quantum states, including bosonic quantum error correction codes. Our results offer new insights into the quantum state transfer and quantum teleportation. In particular, our demonstration validates a new approach to realize quantum transducers, and might find applications in a wide range of physical platforms.