Rotational invariance and spin measurements

The existence of additive conserved quantities implies, as is well known, unavoidable deviations from the ideal von Neumann scheme in the measurement of those observables which do not commute with the conserved quantities. We introduce a formal procedure which allows the derivation of a lower bound for the total squared norm of the non-ideal terms in the case of a measurement of a spin component for a quantum system of arbitrary spin.

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Year of publication:	1982
Authors:	Ghirardi, G.C. ; Rimini, A. ; Weber, T.
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 114.1982, 1, p. 241-244
Publisher:	Elsevier

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010584791