Energy–time entangled photon pairs carry 16–20 bits of potential key per coincidence; demonstrated systems extract 3–7, limited by detector timing jitter. This work proposes placing single-photon time lenses inside the receivers of a dispersive-optics QKD link, magnifying arrival-time structure before detection so the effective resolution beats the jitter by the magnification M — projecting 13–15 bits per coincidence and key rates of order 108 b/s from demonstrated components (rate figure amended hours after launch: architecture-dependent, issue #1), with a nonlocal variant in which the fiber's own dispersion completes an imaging system that exists only in coincidences. Every number below is recomputable in your browser. Don't trust this paper — run it.
This is the paper's central equation with handles on it. Pick a detector, a lens, and a guard factor; the photon information efficiency recomputes live from Eqs. (2)–(6) of the manuscript. The presets reproduce every row of Table 1.
Sixteen checks recompute every number in the manuscript from its stated assumptions — the same arithmetic as the repository's verify_numbers.py, which CI reruns on every commit. During this paper's own audit, this process caught Table 1 overstating its result by 1.5–2.5 bits; the paper was corrected, and the catch is published in the audit trail.
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