Maximally genuine multipartite entangled mixed X-states of N-qubits
Loading...
Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Iop Publishing Ltd
Type
Article
Access right
Acesso aberto
Abstract
For every possible spectrum of 2(N)-dimensional density operators, we construct an N-qubit X-state of the same spectrum and maximal genuine multipartite (GM-) concurrence, hence characterizing a global unitary transformation that -constrained to output X-states-maximizes the GM-concurrence of an arbitrary input mixed state of N qubits. We also apply semidefinite programming methods to obtain N-qubit X-states with maximal GM-concurrence for a given purity and to provide an alternative proof of optimality of a recently proposed set of density matrices for the purpose, the so-called X-MEMS. Furthermore, we introduce a numerical strategy to tailor a quantum operation that converts between any two given density matrices using a relatively small number of Kraus operators. We apply our strategy to design short operator-sum representations for the transformation between any given N-qubit mixed state and a corresponding X-MEMS of the same purity.
Description
Keywords
Entanglement, Genuine multipartite concurrence, N-qubit X-states
Language
English
Citation
Journal Of Physics A-mathematical And Theoretical. Bristol: Iop Publishing Ltd, v. 48, n. 21, p. 1-21, 2015.
