title: Nonlocality tests enhanced by a third observer.
abstract: We consider Bell tests involving bipartite states shared between three parties. We show that the simple inclusion of a third part may greatly simplify the measurement scenario (in terms of the number of measurement settings per part) and allows the identification of previously unknown nonlocal resources.
authors.affiliation: Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543.
authors.forename: Daniel
authors.initials: D
authors.lastname: Cavalcanti
authors.forename: Rafael
authors.initials: R
authors.lastname: Rabelo
authors.forename: Valerio
authors.initials: V
authors.lastname: Scarani