Entangled state error
Bell-state and two-qubit gate error versus year, with an exponential fit per platform.
Platform
Metric type
Platforms
The same plots as the home page, filtered to a single hardware platform, with its best value and rank on every tracked metric.
Superconducting circuits
Entangled state error#2
6.00e-4
2024 · Lin et al.
Qubit count#2
127
2023 · Kim et al.
Relaxation time T1#3
127 s
2023 · Berdou et al.
Coherence time T2#4
1.4 ms
2018 · Rosenblum et al.
Largest QEC code distance#1
d = 29
2024 · Acharya et al.
QEC experiments#1
34
2025 · Rosenfeld et al.
Magic state error#1
1.00e-4
2025 · Rosenfeld et al.
Qubit count
Largest number of physical qubits controlled in one experiment, per platform.
Coherence times
T1 (filled) and T2 (hollow) of physical qubits over time.
Magic state error vs acceptance rate
Logical magic state infidelity against the acceptance rate of the preparation or distillation protocol.
Platform
Magic State
Magic state error over time
Logical magic state infidelity versus year, with error bars from the reported confidence intervals.
Platform
Magic State
QEC timeline
Every quantum error correction experiment by year and code family. Marker size is the number of experiments.
Marker Size
1 exp
3 exps
Data qubits in QEC experiments
Number of data qubits used in QEC experiments per platform over time.
QEC experiments per platform, cumulative
Running total of QEC experiments by platform.
QEC experiments per platform, yearly
QEC experiments published each year, stacked by platform.