We present a public summary of Informational Fiber Synchronization (IFS), a geometriccontrol protocol designed to suppress low-frequency parameter drift (1/f noise) in superconductingquantum processors. By synthesizing a ”Figure-8” loop trajectory in the control parameterspace, IFS generates a topological protection mechanism akin to Virtual Anyons, effectively cancellingdynamic phase errors via geometric echo. Simulation results demonstrate gate fidelity > 0.99under strong (15%) control jitter where standard protocols fail. We also report preliminary pulsesynthesis on IBM Quantum hardware. Note: Specific algorithmic details regarding the phase refinementand estimator logic are redacted in this public version to preserve intellectual property. Fulldetails are available for review under a non-disclosure agreement (NDA) This is a concept paper. Detailed algorithms and source codes are available for collaborative research partners.
We present a public summary of Informational Fiber Synchronization (IFS), a geometriccontrol protocol designed to suppress low-frequency parameter drift (1/f noise) in superconductingquantum processors. By synthesizing a ”Figure-8” loop trajectory in the control parameterspace, IFS generates a topological protection mechanism akin to Virtual Anyons, effectively cancellingdynamic phase errors via geometric echo. Simulation results demonstrate gate fidelity > 0.99under strong (15%) control jitter where standard protocols fail. We also report preliminary pulsesynthesis on IBM Quantum hardware. Note: Specific algorithmic details regarding the phase refinementand estimator logic are redacted in this public version to preserve intellectual property. Fulldetails are available for review under a non-disclosure agreement (NDA) This is a concept paper. Detailed algorithms and source codes are available for collaborative research partners.
We present experimental validation of a software-defined geometric noise suppression protocol on a commercial superconducting quantum processor (Rigetti Ankaa-3 via AWS Braket). The protocol combines three elements: (1) time-reversal symmetric Figure-8 control pulses that create closed trajectories in parameter space, (2) node-synchronized stroboscopic readout that gates measurements at loop-closure times, and (3) adaptive phase tracking that compensates for environmental drift. Key experimental results include: break-even threshold exceeded with +10 percentage point improvement over baseline idle; phase-dependent noise suppression achieving +82 percentage point improvement through optimal phase selection; and discovery of amplitude-phase coupling (APC) where optimal phase shifts by ≈ 0.9 rad per unit amplitude change. This coupling, interpretable as an environmentally-induced Berry connection in control parameter space, explains why conventional fixed-parameter calibration fails at varying drive strengths. The adaptive protocol successfully tracks environmental drift, recovering from 13% to 85% fidelity autonomously. These results demonstrate that geometric structure in quantum control can be exploited for robust, hardware-agnostic noise suppression without physical device modification.
We present experimental validation of a software-defined geometric noise suppression protocol on a commercial superconducting quantum processor (Rigetti Ankaa-3 via AWS Braket). The protocol combines three elements: (1) time-reversal symmetric Figure-8 control pulses that create closed trajectories in parameter space, (2) node-synchronized stroboscopic readout that gates measurements at loop-closure times, and (3) adaptive phase tracking that compensates for environmental drift. Key experimental results include: break-even threshold exceeded with +10 percentage point improvement over baseline idle; phase-dependent noise suppression achieving +82 percentage point improvement through optimal phase selection; and discovery of amplitude-phase coupling (APC) where optimal phase shifts by ≈ 0.9 rad per unit amplitude change. This coupling, interpretable as an environmentally-induced Berry connection in control parameter space, explains why conventional fixed-parameter calibration fails at varying drive strengths. The adaptive protocol successfully tracks environmental drift, recovering from 13% to 85% fidelity autonomously. These results demonstrate that geometric structure in quantum control can be exploited for robust, hardware-agnostic noise suppression without physical device modification.
We present an experimental demonstration of a software-defined noise suppression protocolon a commercial superconducting quantum processor (Rigetti Ankaa-3 via AWS Braket).The protocol combines three layers: (1) Figure-8 control pulses whose 2:1 quadrature frequencyratio gives each loop a vanishing first Fourier moment, (2) node-synchronized readoutthat gates measurements at loop-closure times, and (3) adaptive phase tracking that compensatesfor environmental drift. Key experimental results include: a break-even thresholdexceeded with a +10 percentage-point improvement over baseline idle; phase-dependent suppressionyielding +82 percentage-point variation through optimal phase selection; and theexperimental observation of amplitude–phase coupling (APC), in which the optimal controlphase shifts by ≈ 0.9 rad per unit amplitude change. We report APC here as an operationalfeature of the measured control landscape; its microscopic interpretation in termsof average-Hamiltonian cancellation in a three-level Duffing model has been developed insubsequent work [2, 3]. The adaptive layer recovers fidelity from 13% to 85% autonomouslyafter environmental drift. These results demonstrate that the proposed protocol providesrobust, hardware-agnostic noise suppression without device modification.
Universal Fault Tolerance remains the grand challenge of quantum computing. In this work, we present empirical evidence for a passive error suppression protocol based on a topological geometric phase constraint, Y = π²/φ ≈ 6.0998 rad. Through controlled A/B testing on IBM Quantum processors (127-qubit 'Eagle' and 133-qubit 'Heron'), we report a consistent fidelity improvement of ~ 7% in the generation of Bell States compared to standard circuit implementations. These findings suggest that topological phase engineering acts as a "Zero-Overhead" stabilization layer suitable for NISQ-era hardware.
Description / Abstract Abstract Current Quantum Error Correction (QEC) protocols, such as the Surface Code, are typically optimized for Markovian noise models where errors are independent and identically distributed. We demonstrate that superconducting qubit architectures are susceptible to a specific class of non-Markovian correlated drift that remains undetectable by standard stabilizer measurements until it induces a catastrophic coherence collapse. We analytically derive this failure mode as a Fisher Information Horizon Limit, proving that an estimator optimizing solely for instantaneous gate fidelity experiences a divergence in variance regarding long-term structural drift. We model this "Hyper-Stable" regime as a system approaching an Exceptional Point (EP) in its effective non-Hermitian Hamiltonian. To mitigate this, we propose a control architecture utilizing a Systolic Drift Monitor (SDM) that integrates the geometric Berry phase of the noise history. By implementing a periodic Frame Update Unitary (conceptually isomorphic to basis rotation) on a dual-rail encoded subspace, we convert latent non-Markovian drift into observable execution variance, allowing for real-time suppression of the spectral singularity. Implementation Details The proposed architecture is designed for deployment on FPGA-based quantum control stacks (e.g., Xilinx RFSoC). Simulation results demonstrate a significant improvement in effective coherence times under 1/{f^alpha} noise conditions (alpha = 0.95) by preventing the system from entering the null space of the stabilizer code. The hardware logic is estimated to operate with a feedback latency of < 200 ns, well within the coherence time of standard transmon qubits. Keywords Quantum Error Correction, Superconducting Qubits, Non-Markovian Noise, Exceptional Points, Non-Hermitian Physics, FPGA Control, Dual-Rail Encoding, Fisher Information, Cramér-Rao Bound, Control Theory, Systolic Drift Monitor
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.