Search

MiS Preprint Repository

Delve into the future of research at MiS with our preprint repository. Our scientists are making groundbreaking discoveries and sharing their latest findings before they are published. Explore repository to stay up-to-date on the newest developments and breakthroughs.

MiS Preprint
16/2019

Comment on ``Optimal convex approximations of quantum states"

Xiao-Bin Liang, Bo Li and Shao-Ming Fei

Abstract

In a recent paper, Massimiliano F. Sacchi [Phys. Rev. A 96, 042325 (2017)] addressed the general problem of approximating an unavailable quantum state by the convex mixing of different available states. For the case of qubit mixed states, we show that the analytical solutions in some cases are invalid. In this comment, we present the complete analytical solutions for the optimal convex approximation. Our solutions can be viewed as the supplement to the results in [Phy. Rev. A 96, 042325(2017)]

Received:
Feb 11, 2019
Published:
Feb 14, 2019

Related publications

inJournal
2019 Repository Open Access
Xiao-Bin Liang, Bo Li and Shao-Ming Fei

Comment on ''Optimal convex approximations of quantum states'' [Phys. Rev. A 96, 042325 (2017)]

In: Physical review / A, 99 (2019) 1, p. 016301