= Carl W. Helstrom
{c}
{wiki}
= Carl Helstrom
{c}
{synonym}
<Carl W. Helstrom> developed <quantum detection> and estimation methods for distinguishing signals and inferring parameters in optical systems. His work asks what information a <quantum measurement> can extract when the field itself <limits> accuracy. The <Helstrom-Holevo bound> expresses the minimum error <probability> for distinguishing two specified <quantum states>, connecting a statistical decision problem to an optimal <quantum measurement>.https://opg.optica.org/josa/abstract.cfm?uri=josa-60-2-233[Estimation of Object Parameters by a Quantum-Limited Optical System, 1970]{ref}
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