Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.170402
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Funding
- National Research Foundation
- Ministry of Education, Singapore
- European Social Fund
- state budget of the Czech Republic (POST-UP) [CZ.1.07/2.3.00/30.0004]
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We report an experiment in which one determines, with least tomographic effort, whether an unknown two-photon polarization state is entangled or separable. The method measures whole families of optimal entanglement witnesses. We introduce adaptive measurement schemes that greatly speed up the entanglement detection. The experiments are performed on states of different ranks, and we find good agreement with results from computer simulations.
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