5 papers
A family of separability criteria and lower bounds of concurrence
Xian Shi, Yashuai Sun
The problem on detecting the entanglement of a bipartite state is significant in quantum information theory. In this article, we apply the Ky Fan norm to the revised realignment ma…
Entanglement polygon inequalities for pure states in qudit systems
Xian Shi
Entanglement is one of the important resources in quantum tasks. Recently, Yang [arXiv:2205.08801] proposed an entanglement polygon inequalities (EPI) in terms of some e…
The entropy of quantum causal networks
Xian Shi, Lin Chen
Quantum networks play a key role in many scenarios of quantum information theory. Here we consider the quantum causal networks in the manner of entropy. First we present a revised…
An Extention of Entanglement Measures for Pure States
Xian Shi, Lin Chen
To quantify the entanglement is one of the most important topics in quantum entanglement theory. In [arXiv: 2006.12408], the authors proposed a method to build a measure from the o…
Monogamy relations for generalized W class states in terms of Tsallis entropy beyond qubits
Xian Shi
\indent In this article, we consider the monogamy relations for the generalized W class states. Here we first present an analytical formula on Tsallis- entanglement and Tsallis-…