What question did this study set out to answer?

This research aims to validate the structural coherence protection of GHZ entangled states across different quantum platforms.

January 20, 2026Open Access

Structural Protection of GHZ States Across Superconducting and Trapped-Ion Quantum Processors

Key Points

This research aims to validate the structural coherence protection of GHZ entangled states across different quantum platforms.
Cross-platform comparison between IBM Heron and IonQ Forte quantum processors.
Assessment of decay rates and fidelity for GHZ states versus product states.
Implementation of dynamical decoupling techniques using Z-pulses in trapped ions.
Investigation of non-Markovian memory effects in quantum systems.
Scaling analysis from 3 to 7 qubits for structural protection.
GHZ states exhibit 2.4-13.8× slower decay compared to product states on IBM Heron.
Fidelity advantage of GHZ states is +5-9% on IonQ Forte over product states.
W-states and Cluster states show decreased performance compared to product states on IonQ.
Dynamical decoupling using Z-pulses improves GHZ protection by +2.99%, significantly exceeding IBM's +0.6% enhancement.
Scaling confirmed with 100% consistency across all measurements from 3 to 7 qubits.

Abstract

Version 3. 1: Extended cross-platform validation of structural coherence protection in GHZ entangled states. KEY FINDINGS: - GHZ states show 2. 4-13. 8× slower decay (IBM Heron) and +5-9% fidelity advantage (IonQ Forte) vs product states- Structural protection is GHZ-specific: W-states (-12%) and Cluster states (-38%) underperform product states on IonQ- Non-Markovian memory (N1) detected in trapped ions: Dynamical decoupling with Z-pulses improves GHZ protection by +2. 99%, 5× stronger than IBM's +0. 6%- Scaling confirmed from 3 to 7 qubits with 100% consistency across all measurements PLATFORMS: - IBM Heron: ibmₜorino (r1), ibmfez (r2), ibmboston (r3) - IonQ Forte 1 (trapped ions, 36 qubits) EXPERIMENT DATES: January 15-18, 2026TOTAL INVESTMENT: ~2, 350 USD (IBM + AWS/IonQ) This version extends v2. 1 (DOI: 10. 5281/zenodo. 18284373) with IonQ cross-platform validation, entanglement-type dependence analysis, and non-Markovian memory detection via dynamical decoupling.

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