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29 March 2024
 
  » arxiv » quant-ph/0112154

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Conservation laws, uncertainty relations, and quantum limits of measurements
Masanao Ozawa ;
Date 24 Dec 2001
Journal Phys. Rev. Lett. 88, 050402(1--4) (2002).
Subject quant-ph
AffiliationTohoku University
AbstractThe uncertainty relation between the noise operator and the conserved quantity leads to a bound for the accuracy of general measurements. The bound extends the assertion by Wigner, Araki, and Yanase that conservation laws limit the accuracy of ``repeatable’’, or ``nondisturbing’’, measurements to general measurements, and improves the one previously obtained by Yanase for spin measurements. The bound also sets an obstacle to making a small quantum computer.
Source arXiv, quant-ph/0112154
Other source [GID 1022960] pmid11863707
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