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Anti-symmetrization reveals hidden entanglement
2009
New Journal of Physics
Two-photon anti-bunching at a beamsplitter is only possible if the photons are entangled in a specific state, anti-symmetric in the spatial modes. Thus, observation of anti-bunching is an indication of entanglement in a degree of freedom which might not be easily accessible in an experiment. We experimentally demonstrate this concept in the case of the interference of two frequency entangled photons with continuous frequency detunings. The principle of anti-symmetrisation of the spatial part of
doi:10.1088/1367-2630/11/10/103052
fatcat:bjrzpvyxqvea5fbvrjk2lt55n4