| name | lattice-patch-transmon-architecture |
| description | Lattice patch structure for fixed-frequency transmon quantum computers enabling high-fidelity CNOT gates while overcoming QCQ architecture limitations. |
Lattice Patch Transmon Architecture
Description
Hardware architecture design methodology for fixed-frequency transmon quantum processors using a lattice patch structure that overcomes the physical and structural limitations of conventional qubit-coupler-qubit (QCQ) architectures, enabling high-fidelity CNOT gates with improved scalability.
Activation Keywords
- transmon quantum architecture
- lattice patch structure
- fixed-frequency transmon
- high-fidelity CNOT gate
- superconducting quantum processor
- QCQ architecture alternative
- 超导量子处理器架构
- 晶格补丁transmon
Core Concepts
QCQ Architecture Limitations
- Conventional qubit-coupler-qubit layouts face physical constraints at scale
- Crosstalk increases with qubit density
- Fixed-frequency qubits avoid frequency collisions but limit connectivity
Lattice Patch Design
- Organizes qubits in a lattice pattern with patch-based connectivity
- Each patch provides localized high-fidelity interactions
- Patches can be composed to build larger quantum processors
Fixed-Frequency Advantage
- No frequency tuning needed during operation (reduces noise)
- Simplified control electronics
- Better coherence times compared to tunable qubits
Methodology
Pattern 1: Patch-Based Layout Design
- Define patch geometry (number of qubits per patch, internal connectivity)
- Optimize inter-patch connections for target algorithm classes
- Analyze crosstalk between adjacent patches
- Verify manufacturability constraints (fabrication tolerances, yield)
Pattern 2: CNOT Gate Optimization
- Design gate sequence for each patch topology
- Calibrate cross-resonance or parametric coupling parameters
- Benchmark gate fidelity against surface code threshold
- Iterate layout and pulse design for optimal performance
Resources
- arXiv:2606.27017 — "Lattice patch structure for fixed-frequency transmon quantum computer with high-fidelity CNOT gates"
