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Proposal for Implementing Device-Independent Quantum Key Distribution Based on a Heralded Qubit Amplifier

par Gisin, Nicolas;Pironio, Stefano ;Sangouard, Nicolas
Référence Physical review letters, 105, page (070501)
Publication Publié, 2010

Article révisé par les pairs

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Résumé :

In device-independent quantum key distribution (DIQKD), the violation of a Bell inequality is exploited to establish a shared key that is secure independently of the internal workings of the QKD devices. An experimental implementation of DIQKD, however, is still awaited, since hitherto all optical Bell tests are subject to the detection loophole, making the protocol unsecured. In particular, photon losses in the quantum channel represent a fundamental limitation for DIQKD. Here we introduce a heralded qubit amplifier based on single-photon sources and linear optics that provides a realistic solution to overcome the problem of channel losses in Bell tests. © 2010 The American Physical Society.