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| # Meeting: Decoder Benchmarking Results and Hardware Access Update | |
| Date: 2025-01-22 | |
| Participants: Dr. Sarah Chen, Marcus Webb, Dr. Priya Patel, James Rodriguez, Dr. Elena Volkov | |
| ## Discussion | |
| Great news - IBM Quantum Network access was approved! We now have priority access to the 127-qubit Eagle processor. Dr. Chen demonstrated the initial calibration runs showing T1 times averaging 120μs and T2 times of 80μs across the device. | |
| James presented the decoder benchmarking results: | |
| - MWPM decoder (PyMatching): 94.2% accuracy at p=0.1% physical error rate | |
| - Union-Find decoder: 93.8% accuracy, but 3x faster execution | |
| - Neural network decoder (preliminary): 95.1% accuracy, training ongoing | |
| Marcus showed the distance-5 surface code simulation results. With 49 physical qubits, we achieved a logical error rate of 0.8% at p=0.1% physical error rate. This is competitive with published results. | |
| Dr. Volkov proposed an optimization to the syndrome extraction circuit that reduces depth by 15%. This could significantly improve performance on noisy hardware. | |
| Dr. Patel raised concerns about the decoder latency requirements for real-time feedback. The neural network decoder currently takes 50ms per decode cycle, which exceeds the 10ms requirement. | |
| ## Decisions | |
| - Use Union-Find decoder for real-time experiments (meets latency requirements) | |
| - Continue neural network decoder development for offline analysis | |
| - Implement Dr. Volkov's circuit optimization immediately | |
| - Schedule first hardware experiment for February 5th | |
| - Target submission to Physical Review Letters by March | |
| ## Action Items | |
| - [ ] Marcus Webb: Implement Volkov's circuit optimization by 2025-01-26 | |
| - [ ] James Rodriguez: Optimize neural network decoder inference time by 2025-01-29 | |
| - [ ] Dr. Patel: Prepare hardware experiment protocol by 2025-02-01 | |
| - [ ] Dr. Volkov: Theoretical analysis of optimized circuit fidelity by 2025-01-30 | |
| - [ ] Dr. Chen: Book IBM Quantum time slots for February experiments by 2025-01-25 | |
| - [x] Marcus Webb: Implement distance-5 surface code in Qiskit (completed) | |
| - [x] James Rodriguez: Integrate MWPM decoder from PyMatching library (completed) | |
| ## Blockers | |
| - Neural network decoder latency too high for real-time use - exploring FPGA implementation | |
| - IBM device calibration drifts daily - need to implement recalibration protocol | |
| - Publication embargo from IBM on hardware results until March 1st | |