Experimental demonstration of four-party quantum secret sharing
TLDR
This work presents an experimental demonstration of four-party quantum secret sharing via the resource ofFour-photon entanglement, a multiparty cryptographic task in which some secret information is split into several pieces which are distributed among the participants such that only an authorized set of participants can reconstruct the original secret.Abstract:
Secret sharing is a multiparty cryptographic task in which some secret information is split into several pieces which are distributed among the participants such that only an authorized set of participants can reconstruct the original secret. Similar to quantum key distribution, in quantum secret sharing, the secrecy of the shared information relies not on computational assumptions, but on laws of quantum physics. Here, we present an experimental demonstration of four-party quantum secret sharing via the resource of four-photon entanglement.read more
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Entanglement detection
Otfried Gühne,Géza Tóth +1 more
TL;DR: In this article, the basic elements of entanglement theory for two or more particles and verification procedures, such as Bell inequalities, entangle witnesses, and spin squeezing inequalities, are discussed.
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Controlling passively quenched single photon detectors by bright light
TL;DR: In this article, a single photon detector based on passively quenched avalanche photodiodes can be temporarily blinded by relatively bright light, of intensity less than 1nW. In this regime, all SPDs in the receiver Bob are uniformly blinded by continuous illumination coming from the eavesdropper Eve.
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Genuine multipartite Einstein-Podolsky-Rosen steering.
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Long-distance measurement-device-independent multiparty quantum communication.
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