105-qubit superconducting processor achieving record quantum advantage. Uses frequency-tunable qubits, topological coupling and flip-chip integration. Deployed on Tianyan cloud for global commercial and research access.
Scaling to thousands of qubitsManaging crosstalk, readout fidelity and control routing becomes harder as system size grows.
Surface code overheadFault tolerance via surface codes requires 1000:1 overhead; current systems are far from this regime.
Physics limits
Coherence limited by decoherence mechanismsDielectric loss, radiation and magnetic noise limit quantum state persistence to 10-1000 microseconds despite material advances.
Two-qubit gate fidelity limited by couplingImperfect coupling strength, frequency drift and cross-coupling degrade gate fidelity; precise control is difficult.
How it works
3 parts
Tunable qubits
Frequency-tunable transmons
Adjustable qubit frequencies allow selective coupling and multi-qubit gates without unintended cross-talk.
Coupling
Topological coupling geometry
Novel coupling reduces direct wiring between distant qubits, improving density and reducing losses.
Integration
Flip-chip 3D integration
Control electronics integrated with qubits; reduces wire lengths and electromagnetic losses.
