4 papers · 1 filter
Robust Quantum Extremal Numbers
Wanchen Zhang, Zicheng Han, Xiande Zhang
Absolutely maximally entangled states require every reduction of at most half of the parties to be maximally mixed, a condition that is both rigid and often impossible for qubit sy…
Automated Construction and Verification of Unextendible Product Bases
Zicheng Han, Wanchen Zhang, Fei Shi +1
Unextendible product bases (UPBs) are important structures in quantum information theory, with applications to completely entangled subspaces, bound entanglement, and local indisti…
Extremal Maximal Entanglement
Wanchen Zhang, Yu Ning, Fei Shi +1
A pure multipartite quantum state is called absolutely maximally entangled if all reductions of no more than half of the parties are maximally mixed. However, an -qubit absolute…
Almost all even-particle pure states are determined by their half-body marginals
Wanchen Zhang, Fei Shi, Xiande Zhang
Determining whether the original global state is uniquely determined by its local marginals is a prerequisite for some efficient tools for characterizing quantum states. This paper…