Multipartite Entanglement Verification: Difference between revisions

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==Further Information==
==Further Information==
This protocol was first introduced in Multipartite Entanglement Verification Resistant against Dishonest Parties, ''Anna Pappa et al.'', in which the authors present a version of the protocol where <math>\forall i, \theta_i \in\{0,1\}</math> called the XY protocol. It appeared that this XY version is no longer secure when a certain photon loss rate is tolerated. This is why in Experimental verification of multipartite entanglement in quantum networks, ''W. McCutcheon, A. Pappa et al.'', the authors present the current version of the protocol and they experimentally perform the verification protocol with <math>n=4</math> parties and photonic GHZ states.
This protocol was first introduced in Multipartite Entanglement Verification Resistant against Dishonest Parties, ''Anna Pappa et al.'', in which the authors present an ''XY version'' of the protocol where <math>\forall i, \theta_i \in\{0,1\}</math>. It means that each party applies an X or a Z gate on its qubit before measuring in the computational basis. It appeared that when a 50% qubit loss rate is tolerated, there exists a cheating strategy allowing a dishonest party to convince the verifier that the state shared was a GHZ state even when it is not. This is why in Experimental verification of multipartite entanglement in quantum networks, ''W. McCutcheon, A. Pappa et al.'', the authors present the current version of the protocol which is loss tolerant. They also present an experimental realization of the verification protocol with <math>n=4</math> parties and photonic GHZ states.


In Anonymity for practical quantum networks, ''Anupama Unnikrishnan et al.'', Authors use this verification protocol as a subroutine allowing to be certain to have a GHZ state shared among the parties when they perform an anonymous transmission protocol.
In Anonymity for practical quantum networks, ''Anupama Unnikrishnan et al.'', Authors use this verification protocol as a subroutine allowing the parties to be certain to have a GHZ state shared when they perform an anonymous transmission protocol.


== References ==  
== References ==  
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