TY - JOUR
T1 - Separability of diagonal symmetric states: a quadratic conic optimization problem
JF - Quantum
Y1 - 2018
A1 - Tura, Jordi
A1 - Aloy, Albert
A1 - Quesada, Ruben
A1 - Lewenstein, Maciej
A1 - Sanpera, Anna
VL - 2
UR - https://quantum-journal.orghttps://quantum-journal.org/papers/q-2018-01-12-45/
JO - Quantum
ER -
TY - JOUR
T1 - Entanglement and nonlocality in diagonal symmetric states of
JF - Physical Review A
Y1 - 2017
A1 - Quesada, Ruben
A1 - Rana, Swapan
A1 - Sanpera, Anna
VL - 95
UR - http://link.aps.org/doi/10.1103/PhysRevA.95.042128http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.95.042128/fulltexthttp://link.aps.org/article/10.1103/PhysRevA.95.042128
JO - Phys. Rev. A
ER -
TY - JOUR
T1 - Best separable approximation of multipartite diagonal symmetric states
JF - Physical Review A
Y1 - 2014
A1 - Quesada, Ruben
A1 - Sanpera, Anna
AB - The structural study of entanglement in multipartite systems is hindered by the lack of necessary and sufficient operational criteria able to discriminate among the various entanglement properties of a given mixed state. Here, we pursue a different route to the study of multipartite entanglement based on the closeness of a multipartite state to the set of separable ones. In particular, we analyze multipartite diagonal symmetric N-qubit states and provide the analytical expression for their best separable approximation (BSA, [Phys. Rev. Lett. 80, 2261 (1998)]), that is, their unique convex decomposition into a separable part and an entangled part, with maximal weight of the separable part.
VL - 89
IS - 5
JO - Phys. Rev. A
ER -
TY - JOUR
T1 - Bound entanglement in the Jaynes–Cummings model
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
Y1 - 2013
A1 - Quesada, Nicolás
A1 - Sanpera, Anna
VL - 46
IS - 22
JO - J. Phys. B: At. Mol. Opt. Phys.
ER -