Device-independent certification of entangled measurements
Physical Review Letters, 2011•APS
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.
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.
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.
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