Correlated purification via bi-objective semidefinite programming restores N-representability to noisy 2-RDMs from fermionic shadow tomography and achieves chemical accuracy on hydrogen chain dissociation curves.
Piris, Global Natural Orbital Functional: Towards the Complete Description of the Electron Correlation, Phys
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Proves a general complexity bound: quantum systems solvable via size-independent level-p positivity have entanglement complexity scaling polynomially in p, linking RDM N-representability constraints to computational tractability.
A bi-objective SDP framework for constrained shadow tomography reconstructs N-representable 2-RDMs from noisy shadow data by balancing measurement fidelity with energy minimization for molecular quantum simulations.
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Entanglement Complexity in Many-body Systems from Positivity Scaling Laws
Proves a general complexity bound: quantum systems solvable via size-independent level-p positivity have entanglement complexity scaling polynomially in p, linking RDM N-representability constraints to computational tractability.
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Constrained Shadow Tomography for Molecular Simulation on Quantum Devices
A bi-objective SDP framework for constrained shadow tomography reconstructs N-representable 2-RDMs from noisy shadow data by balancing measurement fidelity with energy minimization for molecular quantum simulations.