TIST-QC Technical Note v0.1: Operational Synchronization Geometry for Superconducting-Qubit Control
Kosaku Tabuchi · Zenodo (CERN European Organization for Nuclear Research) · 2026
This technical note translates Temporal Interference String Theory (TIST) into concrete quantum-control protocols for superconducting qubits and qutrit-like leakage dynamics. Unlike the TIST White Paper, which introduces a broader synchronization-geometric research program, this note focuses on experimentally accessible quantities: readout-frame synchronization, geometric pulse response, leakage-tagged mapping, closed SU(3)-like excursions, and open-system density-matrix modeling. The central operational thesis is that a subset of noise, leakage, phase-response anomalies, and readout ambiguity can be modeled as incomplete synchronization between internal system phase-time and external control/readout time. This does not replace standard superconducting-qubit physics. Instead, it provides a complementary diagnostic layer for identifying synchronization windows, geometric response branches, and leakage-mediated return paths. The note defines measurable synchronization metrics, including phase-derived mismatch Δτ, synchronization quality Csync, co-rotating readout fidelity FCDVP, geometric curvature response CAPC, leakage-tag gain Gm, final leakage Lfinal, and open-system synchronization decay Γsync. It also outlines low-cost pilot experiments designed to distinguish geometric synchronization effects from ordinary pulse calibration, cross-talk, readout drift, and incoherent leakage. This document should be read as the operational quantum-control companion to TIST v0.2.1. Its goal is conservative: not to prove TIST as a fundamental theory, but to define a reproducible quantum-control test suite that can support, constrain, or falsify the TIST-QC interpretation.