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Demonstration of EPR steering using single-photon path entanglement and displacement-based detection



T Guerreiro, F. Monteiro, A Martin, J B. Brask, T Vertesi, Boris Korzh, Felix Bussieres, Varun Verma, Adriana Lita, Richard Mirin, Sae Woo Nam, Francesco Marsili, Matthew D. Shaw, Nicolas Gisin, Nicolas Brunner, Hugo Zbinden, Robert Thew


We demonstrate the violation of an EPR steering inequality developed for single photon path entanglement with displacement-based detection. We use a high-rate source of heralded single-photon path-entangled states, combined with high efficiency superconducting-based detectors, in a scheme that is free of any post-selection and thus immune to the detection loophole. This result conclusively demonstrates single-photon entanglement in a one-sided device-independent scenario and opens the way towards implementation of device-independent quantum technologies within the paradigm of path entanglement.
Physical Review Letters


single photonics, EPR steering, entanglement, SNSPDs


Guerreiro, T. , Monteiro, F. , Martin, A. , Brask, J. , Vertesi, T. , Korzh, B. , Bussieres, F. , Verma, V. , Lita, A. , Mirin, R. , Nam, S. , Marsili, F. , Shaw, M. , Gisin, N. , Brunner, N. , Zbinden, H. and Thew, R. (2016), Demonstration of EPR steering using single-photon path entanglement and displacement-based detection, Physical Review Letters, [online],, (Accessed June 14, 2024)


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Created August 11, 2016, Updated October 12, 2021