Estimating multiparamter simultaneously as precise as possible is an important goal of quantum metrology. As a first step to this end, here we give a condition determining whether two arbitrary parameters can be estimated simultaneously for a qubit in the mixed state. An application of this condition is shown.
CITATION STYLE
Yue, P., Ge, L., & Zheng, Q. (2016). Invertible condition of quantum Fisher information matrix for a mixed qubit. European Physical Journal D, 70(1). https://doi.org/10.1140/epjd/e2015-60460-5
Mendeley helps you to discover research relevant for your work.