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February 13, 2026Open Access

Observer Quality as a Resource Constraint in Quantum Darwinism: Optimal Decoding, ε-Approximate Spectrum Broadcast Structure, and a Central-Spin Worked Example

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AWAlia Wu

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Overview

Explores observer quality's impact on quantum pointer values in quantum systems, suggesting new implications for decoding methods.

Key Points

  • The aim is to examine how observer quality affects the ability to infer classical pointer values in quantum systems.
  • Introduces an observer quality parameterization for Quantum Darwinism analysis.
  • Develops an optimal sample-complexity characterization for measurement fragments.
  • Establishes a data-processing theorem for the impact of calibration noise.
  • Proposes ε-robustness for approximate-SBS states with error control.
  • Findings reveal a discrepancy between collective and product-measurement decoding performance.
  • Characterization of observer parameters in a central-spin pure-dephasing model provides explicit formulas for control variables.
  • Three dynamical results show varying efficiencies based on observer revision topologies and coherence fractions.

Cite This Study

Alia Wu (2026) studied this question.

synapsesocial.com/papers/698ebf6985a1ff6a93016e63https://doi.org/10.5281/zenodo.18609555
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Also Consider

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  1. 1A Functional Criterion for Observer-Systems in the Quantum Measurement Problem2026
  2. 2The Theory of Observerhood in Quantum Measurement: A Trial Formulation of Basis Selection Based on Informational-Geometric Consistency2025
  3. 3The Theory of Observerhood in Quantum Measurement: A Trial Formulation of Basis Selection Based on Informational-Geometric Consistency2025
  4. 4Functional Information in Quantum Darwinism: An Operational Measure of Objectivity2025
  5. 5Observer Access as a Boundary Condition: A Foundational Test of the Born Rule2026