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of 9
pro vyhledávání: '"Trenyi, Róbert"'
We discuss efficient methods to optimize the metrological performance over local Hamiltonians in a bipartite quantum system. For a given quantum state, our methods find the best local Hamiltonian for which the state outperforms separable states the m
Externí odkaz:
http://arxiv.org/abs/2206.02820
Autor:
Trényi, Róbert, Lukács, Árpád, Horodecki, Paweł, Horodecki, Ryszard, Vértesi, Tamás, Tóth, Géza
Publikováno v:
New J. Phys. 26 023034 (2024)
We consider quantum metrology with several copies of bipartite and multipartite quantum states. We characterize the metrological usefulness by determining how much the state outperforms separable states. We identify a large class of entangled states
Externí odkaz:
http://arxiv.org/abs/2203.05538
Autor:
Trényi, Róbert, Curty, Marcos
Publikováno v:
New J. Phys. 23, 093005 (2021)
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 currently used in commercial applications. Surprisingly, however, it has b
Externí odkaz:
http://arxiv.org/abs/2101.07192
Publikováno v:
Phys. Rev. Lett. 125, 260510 (2020)
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 (COW) QKD has been introduced as a promising solution to overcome this l
Externí odkaz:
http://arxiv.org/abs/2006.16891
Autor:
Trényi, Róbert, Lütkenhaus, Norbert
Publikováno v:
Phys. Rev. A 101, 012325 (2020)
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 B 122, 96 (2016)] proposed a protocol to beat a repeaterless bound us
Externí odkaz:
http://arxiv.org/abs/1910.10962
Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution
Publikováno v:
New J. Phys. 21, 113052 (2019)
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 et al. in [Nature Communications 6, 10171 (2015)], which can beat this
Externí odkaz:
http://arxiv.org/abs/1908.04539
Akademický článek
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Autor:
Trenyi, Róbert
Publikováno v:
Investigo. Repositorio Institucional de la Universidade de Vigo
Universidade de Vigo (UVigo)
Universidade de Vigo (UVigo)
The main goal of this research project is to explore novel potential applications of quantum cryptography that can go beyond the application of quantum key distribution and that can outperform current classical solutions. In this framework, the idea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::109330460379acc751543cdea13f15ac
http://hdl.handle.net/11093/2272
http://hdl.handle.net/11093/2272
Akademický článek
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