title: Device-independent certification of entangled measurements.
abstract: We present a device-independent protocol to test if a given black-box measurement device is entangled, that is, has entangled eigenstates. Our scheme involves three parties and is inspired by entanglement swapping; the test uses the Clauser-Horne-Shimony-Holt Bell inequality, checked between each pair of parties. In the case where all particles are qubits, we characterize quantitatively the deviation of the measurement device from a perfect Bell-state measurement.
authors.affiliation: Centre for Quantum Technologies, National University of Singapore, Singapore.
authors.forename: Rafael
authors.initials: R
authors.lastname: Rabelo
authors.forename: Melvyn
authors.initials: M
authors.lastname: Ho
authors.forename: Daniel
authors.initials: D
authors.lastname: Cavalcanti
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brunner
authors.forename: Valerio
authors.initials: V
authors.lastname: Scarani