Work

Geometric steering criterion for two-qubit states

Year: 2018

Type: article

Abstract: According to the geometric characterization of measurement assemblages and local hidden state (LHS) models, we propose a steering criterion which is both necessary and sufficient for two-qubit states under arbitrary measurement sets. A quantity is introduced to describe the required local resources to reconstruct a measurement assemblage for two-qubit states. We show that the quantity can be regarded as a quantification of steerability and be used to find out optimal LHS models. Finally we propose a method to generate unsteerable states, and construct some two-qubit states which are entangled but unsteerable under all projective measurements.

Source: Physical Review A

DOI: 10.1103/physreva.97.012130

Authors: Bai-Chu Yu, Zhih-Ahn Jia, Yu-Chun Wu, Guang-Can Guo

Institutions: University of Science and Technology of China, CAS Key Laboratory of Quantum Information, USTC

Language: English

Topic: Quantum Mechanics and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Award: G2111993882