González Guillén, Carlos E.2023-06-202023-06-202012-08-021050-294710.1103/PhysRevA.86.022304https://hdl.handle.net/20.500.14352/44446We 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.engjournal articlehttp://journals.aps.org/pra/abstract/10.1103/PhysRevA.86.022304open access51-73530.145Física matemáticaTeoría de los quanta2210.23 Teoría Cuántica