31 citations · 89 across the 5 of their papers we have counts for
5 papers
Activation of metrologically useful genuine multipartite entanglement
Róbert Trényi, Árpád Lukács, Paweł Horodecki +3
We consider quantum metrology with several copies of bipartite and multipartite quantum states. We characterize the metrological usefulness by determining how much the state outper…
Zero-error attack against coherent-one-way quantum key distribution
Róbert Trényi, Marcos Curty
Coherent-one-way (COW) quantum key distribution (QKD) held the promise of distributing secret keys over long distances with a simple experimental setup. Indeed, this scheme is curr…
Upper security bounds for coherent-one-way quantum key distribution
Javier González-Payo, Róbert Trényi, Weilong Wang +1
The performance of quantum key distribution (QKD) is severely limited by multi-photon pulses emitted by laser sources due to the photon-number splitting attack. Coherent-one-way (C…
Beating direct transmission bounds for quantum key distribution with a multiple quantum memory station
Róbert Trényi, Norbert Lütkenhaus
Overcoming repeaterless bounds for the secret key rate capacity of quantum key distribution protocols is still a challenge with current technology. D. Luong et al. [Applied Physics…
Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution
Róbert Trényi, Koji Azuma, Marcos Curty
Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quantum key distribution. In this paper, we focus on the protocol proposed by Azuma e…