RT Journal Article T1 Multipartite maximally entangled states in symmetric scenarios A1 González Guillén, Carlos E. AB We consider the class of (N + 1)-partite states suitable for protocols where there is a powerful party, the authority, and the other N parties play the same role, namely, the state of their system lies in the symmetric Hilbert space. We show that, within this scenario, there is a “maximally entangled state” that can be transform by a local operations and classical communication protocol into any other state. In addition, we show how to use the protocol efficiently, including the construction of the state, and discuss security issues for possible applications to cryptographic protocols. As an immediate consequence we recover a sequential protocol that implements the 1-to-N symmetric cloning. PB American Physical Society SN 1050-2947 YR 2012 FD 2012-08-02 LK https://hdl.handle.net/20.500.14352/44446 UL https://hdl.handle.net/20.500.14352/44446 LA eng NO Comunidad de Madrid NO Ministerio de Ciencia e Innovación (MICINN) NO Unión Europea. FP7 DS Docta Complutense RD 27 abr 2024