226 research outputs found
Quantum Group SU_{q}(2) and Pairing in Nuclei
A scheme for treating the pairing of nucleons in terms of generators of
Quantum Group SU_{q}(2) is presented. The possible applications to nucleon
pairs in a single orbit, multishell case, pairing vibrations and
superconducting nuclei are discussed. The formalism for performing BCS
calculations with q-deformed nucleon pairs is constructed and the role played
by deformation parameter q analyzed in the context of nucleons in a single
orbit and for Sn Isotopes.Comment: 6 Pages, No figures, To be published in Proceedings of International
Conference "Geometrical Aspects of Quantum Fields", Londrina PR, April 2000,
World Scientifi
Genuine Four Tangle for Four Qubit States
We report a four qubit polynomial invariant that quantifies genuine four-body
correlations. The four qubit invariants are obtained from transformation
properties of three qubit invariants under a local unitary on the fourth qubit.Comment: 03 pages, This short communication is a contribution to the
proceedings of QCMC 2012 held in Vienna, Austria, July 30th to August 3rd
201
Quantum coherences, K-way negativities and multipartite entanglement
A characterization of N-partite states, based on K-way (K = 2 to N)
negativities, is proposed. The K-way partial transpose with respect to a
subsystem is defined so as to shift the focus to K-way coherences instead of K
subsystems of the composite system. For an N-partite system the fraction of
K-way negativity, contributing to global negativity, is obtained. The
entanglement measures for a given state are identified as the partial
K-way negativities of the corresponding canonical state.Comment: 09 pages, revtex, new section adde
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