Quantum Correlations: A Generalized Heisenberg Uncertainty Relation

13 June 1988

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 60 (24) , 2447-2449
https://doi.org/10.1103/physrevlett.60.2447

Abstract

A theoretical result for correlated quantum systems is presented which leads to a noise commutation relation and a generalized Heisenberg uncertainty relation. These relations imply an inherent and unavoidable extra noise in quantum measurements beyond that already included in the Heisenberg lower bound. These relations lead directly to model-independent lower bounds on inherent noise, useful in a variety of applications, including balanced homodyne detection and quantum optical linear amplifiers.

Keywords

This publication has 3 references indexed in Scilit:

Amplifiers, Attenuators, and Schrödinger's Cat^a
Annals of the New York Academy of Sciences, 1986
Preparation, measurement and information capacity of optical quantum states
Reviews of Modern Physics, 1986
On the Simultaneous Measurement of a Pair of Conjugate Observables
Bell System Technical Journal, 1965