4 papers · 1 filter
The boundary of Kirkwood-Dirac quasiprobability
Lijun Liu, Shuming Cheng
The Kirkwood-Dirac (KD) quasiprobability describes measurement statistics of joint quantum observables, and has generated great interest as prominent indicators of non-classical fe…
The polygon relation and subadditivity of entropic measures for discrete and continuous multipartite entanglement
Lijun Liu, Xiaozhen Ge, Shuming Cheng
In a recent work [Ge {\it et al.}, arXiv: 2312. 17496 (2023)], we have derived the polygon relation of bipartite entanglement measures that is useful to reveal the entanglement pro…
Faithful geometric measures for genuine tripartite entanglement
Xiaozhen Ge, Lijun Liu, Yong Wang +4
We present a faithful geometric picture for genuine tripartite entanglement of discrete, continuous, and hybrid quantum systems. We first find that the triangle relation $\mathcal{…
Efficient factored gradient descent algorithm for quantum state tomography
Yong Wang, Lijun Liu, Shuming Cheng +2
Reconstructing the state of quantum many-body systems is of fundamental importance in quantum information tasks, but extremely challenging due to the curse of dimensionality. In th…