55 citations · 406 across the 26 of their papers we have counts for
4 papers · 1 filter
Systematic generation of entanglement measures for pure states
Ayumu Sugita
We propose a method to generate entanglement measures systematically by using the irreducible decomposition of some copies of a state under the local unitary (LU) transformations.…
Borromean Entanglement Revisited
Ayumu Sugita
An interesting analogy between quantum entangled states and topological links was suggested by Aravind. In particular, he emphasized a connection between the Greenberger-Horne-Zeil…
Macroscopic entanglement of many-magnon states
Tomoyuki Morimae, Ayumu Sugita, Akira Shimizu
We study macroscopic entanglement of various pure states of a one-dimensional N-spin system with N>>1. Here, a quantum state is said to be macroscopically entangled if it is a supe…
Correlations of observables in chaotic states of macroscopic quantum systems
Ayumu Sugita, Akira Shimizu
We study correlations of observables in energy eigenstates of chaotic systems of a large size . We show that the bipartite entanglement of two subsystems is quite strong, wherea…