SG-QST achieves comparable fidelity to full tomography on 3-5 qubit GHZ states using significantly fewer parameters by restricting operators to physically relevant correlations.
The PSD method exhibits the highest agree- ment, as it is derived from the same full set of mea- sured observables
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Structured Quantum State Reconstruction via Physically Motivated Operator Selection
SG-QST achieves comparable fidelity to full tomography on 3-5 qubit GHZ states using significantly fewer parameters by restricting operators to physically relevant correlations.