Chinese scientists used the 78-qubit Zhuangzi 2.0 superconducting chip to first observe prethermalization under random multipolar driving. The system retained over 90% qubit fidelity after 1000 drive cycles, exceeding classical tensor network simulation capabilities. Results published in Nature.
Key Points
- 1.78-qubit superconducting chip with 137 tunable couplers
- 2.First observation of prethermalization plateau in 6x13 qubit array
- 3.Fidelity >90% after 1000 cycles; lifetime τ ∝ (1/T)^{2n+1}
- 4.Quantum advantage: unsimulable by tensor networks or PEPS
- 5.Area-to-volume law transition in subsystem entropy
Impact Analysis
Demonstrates scalable quantum hardware for studying complex dynamics beyond classical limits, advancing quantum simulation for AI optimization and machine learning tasks requiring exponential resources.
Technical Details
Random multipolar drive (n=0,1,2) on alternating half-filled initial state, shortest unit time T=3 ns. Von Neumann entropy and particle imbalance stabilize prethermalization. Non-uniform entropy evolution observed.
