Position Measurements Obeying Momentum Conservation

P Busch; Leon Loveridge

doi:10.1103/PhysRevLett.106.110406

Position Measurements Obeying Momentum Conservation

P Busch, Leon Loveridge

Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

We present a hitherto unknown fundamental limitation to a basic measurement: that of the position of a quantum object when the total momentum of the object and apparatus is conserved. This result extends the famous Wigner-Araki-Yanase theorem, and shows that accurate position measurements are only practically feasible if there is a large momentum uncertainty in the apparatus.

Original language	English
Article number	110406
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review Letters
Volume	106
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.106.110406
Publication status	Published - 18 Mar 2011

Keywords

Mathematical Physics

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10.1103/PhysRevLett.106.110406

http://prl.aps.org/abstract/PRL/v106/i11/e110406

Cite this

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Position Measurements Obeying Momentum Conservation

Abstract

Keywords

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