Investigating a new approach of robustly self-testing two-qubit entangled states

Chan-Ching Lien^1,2*, Shin-Liang Chen^2,3,4

¹Department of Physics, National Cheng Kung University, Tainan, Taiwan
²Department of Physics, National Chung Hsing University, Taichung, Taiwan
³Physics Division, National Center for Theoretical Sciences, Taipei, Taiwan
⁴Center for Quantum Frontiers of Research & Technology (QFort), National Cheng Kung University, Tainan, Taiwan

* Presenter:Chan-Ching Lien, email:l28121040@gs.ncku.edu.tw

In a recent paper [Quantum 5, 552 (2021)], the authors proposed a framework for robustly selftesting steerable quantum assemblages. In this work, we apply their method to the scenario of self-testing two-qubit entangled quantum states. The new bounds on the fidelity with the reference states are compared with other methods.

Keywords: Quantum information theory, Nonlocality, Quantum correlations in quantum information, self-testing