4 papers
Detection of many-body entanglement partitions in a quantum computer
Albert Rico, Dmitry Grinko, Robin Krebs +1
We present a method to detect entanglement partitions of multipartite quantum systems, by exploiting their inherent symmetries. Structures like genuinely multipartite entanglement,…
Measuring multipartite entanglement efficiently by testing symmetries
Xiaoyu Liu, Jordi Tura, Albert Rico
Recently, a technique known as quantum symmetry test has gained increasing attention for detecting bipartite entanglement in pure quantum states. In this work we show that, beyond…
Quantum Advantage in Identifying the Parity of Permutations with Certainty
Arnau Diebra, Santiago Llorens, David González-Lociga +4
We establish a sharp quantum advantage in determining the parity (even/odd) of an unknown permutation applied to any number of particles. Classically, this is impossible…
State-witness contraction
Albert Rico
We construct both nonlinear and linear entanglement witnesses, by tensoring and partial tracing existing states and witnesses. We show that little shared quantum resources allow to…