Zobrazeno 1 - 10
of 165
pro vyhledávání: '"Horodecki, Karol"'
In this paper, we develop the resource theory of quantum secret key. Operating under the assumption that entangled states with zero distillable key do not exist, we define the key cost of a quantum state, and device. We study its properties through t
Externí odkaz:
http://arxiv.org/abs/2402.17007
As quantum theory allows for information processing and computing tasks that otherwise are not possible with classical systems, there is a need and use of quantum Internet beyond existing network systems. At the same time, the realization of a desira
Externí odkaz:
http://arxiv.org/abs/2308.12739
The usual figure of merit characterizing the performance of neural networks applied to problems in the quantum domain is their accuracy, being the probability of a correct answer on a previously unseen input. Here we append this parameter with the un
Externí odkaz:
http://arxiv.org/abs/2212.13564
Publikováno v:
npj Quantum Inf 9, 63 (2023)
The Kochen-Specker (KS) theorem is a corner-stone result in the foundations of quantum mechanics describing the fundamental difference between quantum theory and classical non-contextual theories. Recently specific substructures termed $01$-gadgets w
Externí odkaz:
http://arxiv.org/abs/2206.13139
Autor:
Horodecki, Karol, Pawela, Łukasz
Quantum key repeater is the backbone of the future Quantum Internet. It is an open problem for an arbitrary mixed bipartite state shared between stations of a quantum key repeater, how much of the key can be generated between its two end-nodes. We pl
Externí odkaz:
http://arxiv.org/abs/2206.00993
Autor:
Horodecki, Karol, Zhou, Jingfang, Stankiewicz, Maciej, Salazar, Roberto, Horodecki, Paweł, Raussendorf, Robert, Horodecki, Ryszard, Ramanathan, Ravishankar, Tyhurst, Emily
Publikováno v:
New J. Phys. 25 073003 (2023)
Quantum contextuality is one of the most recognized resources in quantum communication and computing scenarios. We provide a new quantifier of this resource, the rank of contextuality (RC). We define RC as the minimum number of non-contextual behavio
Externí odkaz:
http://arxiv.org/abs/2205.10307
Publikováno v:
Physical Review A, vol 105, issue 2, page 022604, February 2022
We provide several general upper bounds on the rate of a key secure against a quantum adversary in the device-independent conference key agreement (DI-CKA) scenario. They include bounds by reduced entanglement measures and those based on multipartite
Externí odkaz:
http://arxiv.org/abs/2111.02467
Publikováno v:
Entropy 2021, 23, 1182
We investigate whether the heart rate can be treated as a semi-random source with the aim of amplification by quantum devices. We use a semi-random source model called $\epsilon$-Santha-Vazirani source, which can be amplified via quantum protocols to
Externí odkaz:
http://arxiv.org/abs/2107.14630
Publikováno v:
Phys. Rev. A 104, 052422 (2021)
We quantify the consequences of a private key leakage and private randomness generated during quantum key distribution. We provide simple lower bounds on the one-way distillable key after the leakage has been detected. We also show that the distribut
Externí odkaz:
http://arxiv.org/abs/2107.10737
Publikováno v:
Physical Review Applied, vol 18, issue 5, page 054033, November 2022
In this work, we develop upper bounds for key rates for device-independent quantum key distribution (DI-QKD) protocols and devices. We study the reduced cc-squashed entanglement and show that it is a convex functional. As a result, we show that the c
Externí odkaz:
http://arxiv.org/abs/2107.06411