| name | fluxonium-scalable-architecture |
| description | Scalable fluxonium quantum processor architecture using tunable-coupler unit cells. Achieves 99.9% CZ gate fidelity and demonstrates 22-qubit GHZ state generation. Alternative to transmon-based superconducting quantum computers. Keywords: fluxonium, superconducting qubits, tunable coupler, scalable quantum processor, CZ gate, high fidelity, quantum hardware. |
Fluxonium Scalable Architecture
Scalable fluxonium quantum processor architecture based on modular qubit-coupler unit cells with demonstrated high-fidelity operations.
Core Concepts
Fluxonium Advantages
- Intrinsic Error Protection: Alternative to transmon with better protection
- Scalability: Modular unit cell design
- High Fidelity: 99.9% two-qubit gate fidelity achieved
Architecture
- Unit Cell: Modular qubit-coupler design
- Tunable Coupler: Mediates interactions between fluxonium qubits
- Lattice: Composable many-qubit architecture
Technical Specifications
Single-Qubit Gates
- Fidelity: Approaching 99.99%
- Operation: Parallel execution supported
Two-Qubit Gates (CZ)
- Fidelity: ~99% (average), 99.9% (best)
- Gate Duration: 32 ns (optimized)
- Type: CZ (controlled-Z) gate
System Scale
- Demonstrated: 22-qubit processor
- GHZ States: Up to 10 qubits deterministically generated
Key Features
Suppressed Interactions
- Residual interactions minimized
- Spectator errors suppressed
- Clean composition of unit cells
Scalability Validation
- 22-qubit processor demonstration
- No emergent interaction pathologies
- Parallel operations enabled
Workflow
Step 1: Qubit Initialization
Initialize fluxonium qubits in lattice
Step 2: Single-Qubit Operations
Apply parallel single-qubit gates with high fidelity
Step 3: Two-Qubit Operations
Execute CZ gates via tunable coupler
Step 4: Multi-Qubit Operations
Generate entangled states (GHZ, etc.)
Applications
Quantum Simulation
- Many-body physics
- Lattice models
- Quantum chemistry
Quantum Computing
- NISQ algorithms
- Error correction codes
- Quantum machine learning
Benchmarking
- GHZ state generation
- Entanglement verification
- Fidelity characterization
Comparison: Fluxonium vs Transmon
| Feature | Fluxonium | Transmon |
|---|
| Error Protection | High | Moderate |
| Gate Fidelity | 99.9% CZ | ~99% typical |
| Scalability | Demonstrated | Established |
| Architecture | Modular unit cell | Various |
References
- Paper: arXiv:2604.13363 - "Scalable Fluxonium Quantum Processors via Tunable-Coupler Architecture"
- Category: Quantum Hardware / Superconducting Qubits
Related Skills
- superconducting-quantum-computing
- quantum-hardware-design
- quantum-gate-calibration
