Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Optimal parameter estimation of a depolarizing channel

Ban, Masashi and Barnett, Stephen M. and Sasaki, Masahide (2002) Optimal parameter estimation of a depolarizing channel. Physical Review A, 66 (2). ISSN 1094-1622

[img]
Preview
Text (strathprints005853)
strathprints005853.pdf - Accepted Author Manuscript

Download (298kB) | Preview

Abstract

We investigate strategies for estimating a depolarizing channel for a finite dimensional system. Our analysis addresses the double optimization problem of selecting the best input probe state and the measurement strategy that minimizes the Bayes cost of a quadratic function. In the qubit case, we derive the Bayes optimal strategy for any finite number of input probe particles when bipartite entanglement can be formed in the probe particles.