Workbench tool

QBER forensics dashboard

Decompose measured QBER into transparent additive proxies for calibration, visibility, noise, mismatch, and educational intercept-resend disturbance.

Measured QBERMisalignment errorVisibilityDark count probabilityBackground probabilityDetector mismatchEve/intercept fractionSimulation-only disturbance variable.Signal detection probability

Measured QBER

3.5%

Modeled QBER

3.21%

Residual

0.288%

Contribution breakdown

Calibration and misalignment1.2%

Visibility or mode mismatch1%

Dark/background counts0.0125%

Detector efficiency mismatch1%

Intercept-resend disturbance0%

Likely causes

no dominant contribution in the simplified model

No model warnings for the current inputs.

Formulas and assumptions

QBER contributions are additive proxies and are clamped to [0, 0.5].
Noise clicks are modeled as random bit values.
Intercept-resend is included only as an educational disturbance model.

Tools

Engineering and research workbench

Loading the selected calculator, defaults, and scientific caution notes.

Preparing tool

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Preparing calibrated controls, default presets, and explanatory notes.