2016
DOI: 10.1038/ncomms13523
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Abstract: The quantum internet holds promise for achieving quantum communication—such as quantum teleportation and quantum key distribution (QKD)—freely between any clients all over the globe, as well as for the simulation of the evolution of quantum many-body systems. The most primitive function of the quantum internet is to provide quantum entanglement or a secret key to two points efficiently, by using intermediate nodes connected by optical channels with each other. Here we derive a fundamental rate-loss trade-off f… Show more

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Cited by 82 publications
(111 citation statements)
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References 54 publications
(187 reference statements)
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“…This allows us to formally identify two sufficient properties that, if satisfied by a given pair E,  ( ), lead to a new instance of equation (2). We then show that those two properties also allow us to generalise the result of [24] on quantum networks to different entanglement measures: E R when the channels in the network are Choi-simulable, or E max . The first case is particularly interesting, because equation (2) is often known to be tighter when stated in terms of E R , rather than in terms of E sq .…”
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confidence: 90%
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“…This allows us to formally identify two sufficient properties that, if satisfied by a given pair E,  ( ), lead to a new instance of equation (2). We then show that those two properties also allow us to generalise the result of [24] on quantum networks to different entanglement measures: E R when the channels in the network are Choi-simulable, or E max . The first case is particularly interesting, because equation (2) is often known to be tighter when stated in terms of E R , rather than in terms of E sq .…”
mentioning
confidence: 90%
“…In section 3 we formally identify sufficient properties that, if satisfied by a pair E,  ( ), lead to an upper bound on the capacity of the channel as in equation (2). Furthermore, along the lines of [24], we show how the same properties are also sufficient to obtain an upper bound on the number of ebits (or pbits) generated through a quantum network. Our main result is presented in section 4, where we derive a similar versatile upper bound, in which different entanglement measures are applied to the channels of the network depending on their Choi-simulability.…”
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confidence: 99%
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“…Recall that QKDs are expected to be secure against ultimately powerful Eve. In the literature 52 , the optimum communication rate is derived in terms of the trace distance criterion, however, as the author described, QKDs have been estimating the best performance under the worst scenarios, therefore the next direction of researches of the quantum network should be the derivations of the best performance under the worst scenarios.…”
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confidence: 99%