Advancements in Superconducting Quantum Networks for Scalability Beyond Single Cryostat

Superconducting quantum circuits have made remarkable progress in scalable quantum computation. However, the pursuit of scaling these circuits encounters challenges such as chip size limitations, cooling capacity constraints, and increasing wiring complexity. To address these issues, a distributed architecture emerges as a promising solution, enabling scalability beyond a single chip or cryostat, while emphasizing low-loss, long-distance connections. Recent achievements have extended the record to 30 meters [1].

In this talk, we will present our experimental progress in developing a superconducting network featuring a 64-meter-long channel [2]. Leveraging several key technical breakthroughs [3], we have achieved deterministic high-fidelity entangled pair generation and executed quantum teleportation across the network. Our findings not only demonstrate the feasibility of implementing long-distance quantum communication in superconducting architectures but also underscore the potential for realizing practical, large-scale quantum computation systems.

[1] S. Storz et al., Nature 617, 265 (2023).

[2] J. Qiu et al., arXiv:2302.08756.

[3] J. Niu et al., Nat. Electron. 6, 235 (2023).