Results 51 to 60 of about 11,751,425 (374)
Strategies for achieving high key rates in satellite-based QKD
npj Quantum Information, 2021 Quantum key distribution (QKD) is a pioneering quantum technology on the brink of widespread deployment. Nevertheless, the distribution of secret keys beyond a few 100 km at practical rates remains a major challenge.
Sebastian Ecker +8 more
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Quantum data processing and error correction [PDF]
, 1996 This paper investigates properties of noisy quantum information channels. We define a new quantity called {\em coherent information} which measures the amount of quantum information conveyed in the noisy channel.
A. Wehrl +14 more
core +3 more sources
Quantum-enhanced radiometry via approximate quantum error correction
Nature Communications, 2022 Exotic quantum states can be advantageous for sensing, but are very fragile, so that some form of quantum error correction is needed. Here, the authors show how approximate QEC helps overcoming decoherence due to noise when measuring the excitation ...
W. Wang +14 more
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Quantum advantages for transportation tasks - projectiles, rockets and quantum backflow
npj Quantum Information, 2023 Consider a scenario where a quantum particle is initially prepared in some bounded region of space and left to propagate freely. After some time, we verify if the particle has reached some distant target region.
David Trillo +2 more
doaj +1 more source
Quantum Information Causality [PDF]
Physical Review Letters, 2013 How much information can a transmitted physical system fundamentally communicate? We introduce the principle of quantum information causality, which states the maximum amount of quantum information that a quantum system can communicate as a function of its dimension, independently of any previously shared quantum physical resources.
openaire +4 more sources
Quantum information to the home [PDF]
New Journal of Physics, 2011 A novel Raman-noise suppression scheme has enabled the first quantum key distribution (QKD) over a Gigabit-Ethernet PON carrying realistic data traffic. The DPSK-QKD system produced a sifted-key rate of 84kb/s with a Quantum-BER of 4%.
Choi, Iris +2 more
openaire +4 more sources
npj Quantum Information, 2023 Quantum entanglement between an interfering particle and a detector for acquiring the which-path information plays a central role for enforcing Bohr’s complementarity principle.
Xin-Jie Huang +14 more
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Partial quantum information [PDF]
Nature, 2005 Information--be it classical or quantum--is measured by the amount of communication needed to convey it. In the classical case, if the receiver has some prior information about the messages being conveyed, less communication is needed. Here we explore the concept of prior quantum information: given an unknown quantum state distributed over two systems,
Horodecki, M, Oppenheim, J, Winter, AJ
openaire +4 more sources
Information-Theoretic Meaning of Quantum Information Flow and Its Applications to Amplitude Amplification Algorithms [PDF]
, 2019 The advantages of quantum information processing are in many cases obtained as consequences of quantum interactions, especially for computational tasks where two-qubit interactions are essential.
Bae, Joonwoo, Roy, Sudipto Singha
core +1 more source
Distribution of high-dimensional entanglement via an intra-city free-space link
Nature Communications, 2017 Increasing the dimensionality of entangled states improves robustness and capacity of secure quantum communications, but it requires suitably modified setups.
Fabian Steinlechner +7 more
doaj +1 more source