Arbitrarily Loss-Tolerant Einstein-Podolsky-Rosen Steering Allowing a Demonstration over 1 km of Optical Fiber with No Detection Loophole
2012; American Physical Society; Volume: 2; Issue: 3 Linguagem: Inglês
10.1103/physrevx.2.031003
ISSN2160-3308
AutoresAdam Bennet, David A. Evans, D. J. Saunders, Cyril Branciard, Eric G. Cavalcanti, Howard M. Wiseman, Geoff J. Pryde,
Tópico(s)Orbital Angular Momentum in Optics
ResumoDemonstrating nonclassical effects over longer and longer distances is essential for both quantum technology and fundamental science. The main challenge is loss of photons during propagation, because considering only those cases where photons are detected opens a "detection loophole" in security whenever parties or devices are untrusted. Einstein-Podolsky-Rosen (EPR) steering is equivalent to an entanglement-verification task in which one party (device) is untrusted. We derive arbitrarily loss-tolerant tests, enabling us to perform a detection-loophole-free demonstration of EPR-steering with parties separated by a coiled 1 km optical fiber, with a total loss of 8.9 dB (87%).
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