Exact Solutions for Spin Conserving Models and the Wigner-Araki-Yanase Theorem
Summary
arXiv:2606.02861v1 Announce Type: new Abstract: The Wigner-Araki-Yanase (WAY) theorem is a well-known theorem regarding limitations of quantum measurement in the presence of additive conservation laws. Under the assumptions of the von Neumann measurement model, for which the system conserved quantity $L_{S}$ is bounded, given a conserved total additive system plus apparatus quantity $L_{SA}$, the measurement operator $E_{S}$ must commute with $L_{S}$. Prior proofs have exploited the properties of unitary evolution constrained by momentum conserving operations that tend to obscure the physical nature of the WAY theorem and as well lead to bounds on performance.
Why It Matters
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Key Facts
- SectorQuantum
- Market—
- ImpactLow (42/100)
- SignalResearch