Lesson 5 of 7 · 45 minutes

Two qubits and the real bottleneck

You will be able to

  • Estimate dipolar coupling and gate time from spacing
  • Build an error budget for an entangling gate
  • Explain why charge-state preparation dominates
1 · Read
2 · Play

In panel 5, set T₂ to 600 µs and preparation to 1.0, then lower preparation to 0.75. Compare with the measured 0.67 of the 2013 experiment.

Open the lab →
3 · Compute

The same physics in Python. Run it in your browser with Colab, or locally after pip install -e .

from adamas import gate_budget as gb

g = gb.published_check()
print('coherence-limited fidelity', round(g.f_coherent, 4))

for q in (0.75, 0.87, 1.0):
    print(q, round(gb.published_check(q).fidelity, 3))
Open notebook in Colab
4 · Check
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