4 papers · 1 filter
Entangling power of symmetric multiqubit systems: a geometrical approach
Eduardo Serrano-Ensástiga, Diego Morachis Galindo, Jesús A. Maytorena +1
Unitary gates with high entangling capabilities are relevant for several quantum-enhanced technologies. For symmetric multiqubit systems, such as spin states or bosonic systems, th…
Nonequivalence between absolute separability and positive partial transposition in the symmetric subspace
Jonathan Louvet, Eduardo Serrano-Ensástiga, Thierry Bastin +1
The equivalence between absolutely separable states and absolutely positive partial transposed (PPT) states in general remains an open problem in quantum entanglement theory. In th…
Symmetric Multiqudit States: Stars, Entanglement, Rotosensors
Chryssomalis Chryssomalakos, Louis Hanotel, Edgar Guzmán-González +3
A constellation of Majorana stars represents an arbitrary pure quantum state of dimension or a permutation-symmetric state of a system consisting of qubits. We gene…
When geometric phases turn topological
Pedro Aguilar, Chryssomalis Chryssomalakos, Edgar Guzmán-González +2
Geometric phases, accumulated when a quantum system traces a cycle in quantum state space, do not depend on the parametrization of the cyclic path, but do depend on the path itself…