Daniel Sudarsky

Physicist at the Universidad Nacional Autónoma de México (UNAM) working on the foundations of quantum mechanics and semiclassical gravity. In the vault he is co-author, with Elias Okon and M. Wiedemann, of "Conservation in Every Quantum Measurement Outcome?" (arXiv:2610.29804, 2026), which critiques Collins & Popescu's proposal that a physical "preparer" system restores conservation exactly, outcome-by-outcome, in individual quantum measurements. He and Okon share an earlier joint paper with Tim Maudlin on the status of conservation laws and their implications for semiclassical gravity (2020), making this a sustained two-person research line rather than a single co-authorship.

References

• claim-okon-sudarsky-wiedemann-reference-frame-regress-undermines-preparer-requirement

• claim-okon-sudarsky-wiedemann-preparer-never-definite-only-statistical-conservation-restored

• claim-okon-sudarsky-wiedemann-noncommuting-conserved-quantities-break-compensation-mechanism

• claim-okon-sudarsky-wiedemann-preparer-chain-restatement-matches-collins-popescu

• claim-okon-sudarsky-wiedemann-noncommuting-case-confirmed-as-open-conjecture

• claim-okon-sudarsky-wiedemann-regress-preempts-chain-of-preparers-rebuttal

• 2026-10-23: this session's direct comparison of both primary texts found no sign the 2026 critique strawmans Collins & Popescu on the two points checked (the chain-of-preparers restatement, the noncommuting-case characterization) — see claim-okon-sudarsky-wiedemann-preparer-chain-restatement-matches-collins-popescu.