Tunable Superconducting Bose-Hubbard Simulator

Quantum correlation dynamics tunable

Floquet-engineered superconducting qutrit arrays with tunable interactions allow quantum walks to be tuned from bosonic bunching to fermionic antibunching.

Si-Yun, Zhou · Shi, Yun · Yang, H. Z. · Zhang, Jingning · Kui, Zhao · Feng, Yulong · Xue, Guangming · Liu, Yu · Wei-Guo, Ma · Cai-Ping, Fang · Tian-Tian, Liu · Wang, Yong · Xu, Kai · Yu, Haifeng · Fan, Heng

Physical Review Letters 2026

Advantages

Interactions continuously tunable

Floquet engineering allows the on-site interaction U to be continuously tuned, enabling the transition from bosonic to fermionic behavior on the same device.

Entanglement propagation can be suppressed

By increasing U, entanglement propagation in two-particle quantum walks can be strongly suppressed, useful for controlling the spread of quantum information.

Applications

• Quantum Simulation：Simulate correlation dynamics in many-body quantum systems with superconducting circuits.
• Quantum Correlation Studies：Study how interactions affect the propagation of entanglement and quantum discord.