We present a resource-performance tradeoff of an all-optical quantum repeater that uses photon sources, linear optics, photon detectors, and classical feedforward at each repeater node, but no quantum memories. We show that the quantum-secure key rate has the form R(eta) = D eta(s) bits per mode, where I) is the end-to-end channel's transmissivity, and the constants D and s are functions of various device inefficiencies and the resource constraint, such as the number of available photon sources at each repeater node. Even with lossy devices, we show that it is possible to attain s < 1, and in turn outperform the maximum key rate attainable without quantum repeaters, R-direct(eta) = log2(1-eta)approximate to(1/ln 2)eta bits per mode for eta ...
The distribution of quantum states over long distances is limited by photon loss. Straightforward am...
Decoherence is detrimental to quantum key distribution (QKD) over large distances. One of the propos...
The optimal performance of a communication network is limited not only by the quality of point-to-po...
Despite the tremendous progress of quantum cryptography, efficient quantum communication over long d...
Quantum communications capacity using direct transmission over length-L optical fiber scales as R∼e-...
Quantum key distribution allows for the generation of a secret key between distant parties connected...
The derivation of ultimate limits to communication over certain quantum repeater networks have provi...
Major obstacles against efficient long-distance quantum communication are photon losses during trans...
Entangled photons can be used to create a truly secure communication link between two parties. Howev...
Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quant...
In quantum mechanics, a fundamental law prevents quantum communications to simultaneously achieve hi...
We present an efficient architecture for quantum repeaters based on single-photon sources in combina...
Quantum communication enables the implementation of tasks that are unachievable with classical resou...
The problem of distributing a secret key by quantum channels is one of the preeminent problems in qu...
We analyze various prominent quantum repeater protocols in the context of long-distance quantum key ...
The distribution of quantum states over long distances is limited by photon loss. Straightforward am...
Decoherence is detrimental to quantum key distribution (QKD) over large distances. One of the propos...
The optimal performance of a communication network is limited not only by the quality of point-to-po...
Despite the tremendous progress of quantum cryptography, efficient quantum communication over long d...
Quantum communications capacity using direct transmission over length-L optical fiber scales as R∼e-...
Quantum key distribution allows for the generation of a secret key between distant parties connected...
The derivation of ultimate limits to communication over certain quantum repeater networks have provi...
Major obstacles against efficient long-distance quantum communication are photon losses during trans...
Entangled photons can be used to create a truly secure communication link between two parties. Howev...
Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quant...
In quantum mechanics, a fundamental law prevents quantum communications to simultaneously achieve hi...
We present an efficient architecture for quantum repeaters based on single-photon sources in combina...
Quantum communication enables the implementation of tasks that are unachievable with classical resou...
The problem of distributing a secret key by quantum channels is one of the preeminent problems in qu...
We analyze various prominent quantum repeater protocols in the context of long-distance quantum key ...
The distribution of quantum states over long distances is limited by photon loss. Straightforward am...
Decoherence is detrimental to quantum key distribution (QKD) over large distances. One of the propos...
The optimal performance of a communication network is limited not only by the quality of point-to-po...