7 citations · 7 across the 2 of their papers we have counts for
4 papers
Universal Sums of Triangular Numbers and Squares
Zichen Yang
In this paper, we study universal sums of triangular numbers and squares. Specifically, we prove that a sum of triangular numbers and squares is universal if and only if it represe…
On finiteness theorems for sums of generalized polygonal numbers
Ben Kane, Zichen Yang
In this paper, we consider mixed sums of generalized polygonal numbers. Specifically, we obtain a finiteness condition for universality of such sums; this means that it suffices to…
Tighter monogamy and polygamy relations of quantum entanglement in multi-qubit systems
Wen-Wen Liu, Zi-Feng Yang, Shao-Ming Fei
We investigate the monogamy relations related to the concurrence, the entanglement of formation, convex-roof extended negativity, Tsallis-q entanglement and R'enyi-α entanglement,…
Approximate quantum state reconstruction without a quantum channel
Zichen Yang, Ze-Yang Fan, Liang-Zhu Mu +1
We investigate the optimal quantum state reconstruction from cloud to many spatially separated users by measure-broadcast-prepare scheme without the availability of quantum channel…