research
Quantum Estimation Loses the Preexisting Value
A no-go theorem says entangled probes, complete quantum states and unique measurement-independent quantity values cannot all coexist.
Summary
A no-go theorem says entangled probes, complete quantum states and unique measurement-independent quantity values cannot all coexist.
The authors generalize quantum parameter estimation beyond an assumed unknown classical parameter. Under standard entanglement and state-completeness assumptions, they show that a unique value existing before measurement is incompatible with the framework. The result is foundational analysis, not a claim that practical estimators stop working.
Why it matters
A no-go theorem says entangled probes, complete quantum states and unique measurement-independent quantity values cannot all coexist.
Limits and context
- The result is foundational analysis, not a claim that practical estimators stop working.
Key claims
A no-go theorem says entangled probes, complete quantum states and unique measurement-independent quantity values cannot all coexist.
Qualification: The result is foundational analysis, not a claim that practical estimators stop working.
Evidence: source-2026-10-23-017
Sources
- arXiv preprint 2610.31632, original v1arXiv · primary research
Corrections
No corrections have been recorded for this story.