Coherence and Quantum Optics VII

Joseph H. Eberly, L. Mandeļ, E. Wolf

Fabio Luigi Zander

Self-contained, deployable five-stage gate-calibration pipeline for noisy quantum systems Stage 1: Cramér–Rao precision floor with Heisenberg-Gate constraint. Stage 2: AR(1) signal conditioning with Kalman filtering and Huber-robust outlier rejection. Stage 3: four coherence metrics (HBT, relative entropy, percent-coherence, absolute normalized). Stage 4: universal Logit-Gate with closed-form two-parameter calibration (x₅₀, slope s). Stage 5: BKW drift surveillance with traffic-light alerting. Includes worked transmon readout example, default parameter table, gate-composition protocol, and time-crystal scheduling. Platform-agnostic. Paper VII of VII — engineering capstone of the Δ-Gate series. Part of the Δ-Gate Formalism (DOI: 10.5281/zenodo.19103765).

Franciszek K. Kaczmarek, S. Kielich

Michael Berry

Collective

Wilds David Ross

An ultra fast, three port logical gate has been demonstrated using two-pulse photon echo in dye-doped polymer films at low temperatures.Since the coherence time T2 is much longer than the intervals between the excitation pulses, many more pulses can be added to the system, resulting in coherent interaction (interference) of N inputs.And finally, because of causality, pulses which come later in time vii