Results 41 to 50 of about 5,139,381 (338)
QUARC: Quantum Research Cubesat - A Constellation for Quantum Communication
Cryptogr., 2020 Quantum key distribution (QKD) offers future proof security based on fundamental laws of physics. Long-distance QKD spanning regions such as the United Kingdom (UK) may employ a constellation of satellites.
L. Mazzarella +9 more
semanticscholar +1 more source
Nature Communications, 2021 Operating donor-based quantum computers in silicon is hindered by the dependence of inter-qubit coupling on the precise donor position. Here, the authors show controlled rotation operation on exchange-coupled electron spins in the weak-exchange regime ...
Mateusz T. Ma̧dzik +8 more
doaj +1 more source
New lower bounds to the output entropy of multi-mode quantum Gaussian channels [PDF]
, 2019 We prove that quantum thermal Gaussian input states minimize the output entropy of the multi-mode quantum Gaussian attenuators and amplifiers that are entanglement breaking and of the multi-mode quantum Gaussian phase contravariant channels among all the
De Palma, Giacomo
core +2 more sources
Indefinite causal order enables perfect quantum communication with zero capacity channels [PDF]
New Journal of Physics, 2018 Quantum mechanics is compatible with scenarios where the relative order between two events can be indefinite. Here we show that two independent instances of a noisy process can behave as a perfect quantum communication channel when used in a coherent ...
G. Chiribella +8 more
semanticscholar +1 more source
Secure Quantum Communication Technologies and Systems: From Labs to Markets
, 2020 We provide a broad overview of current quantum communication by analyzing the recent discoveries on the topic and by identifying the potential bottlenecks requiring further investigation.
F. Cavaliere +4 more
semanticscholar +1 more source
On the equivalence between squeezing and entanglement potential for two-mode Gaussian states
Scientific Reports, 2023 The maximum amount of entanglement achievable under passive transformations by continuous-variable states is called the entanglement potential. Recent work has demonstrated that the entanglement potential is upper-bounded by a simple function of the ...
Bohan Li +5 more
doaj +1 more source
Optical quantum communication complexity in the simultaneous message passing model [PDF]
Phys. Rev. A 102, 062608 (2020), 2020 The communication cost of a classical protocol is typically measured in terms of the number of bits communicated for this determines the time required for communication during the protocol. Similarly, for quantum communication protocols, which use finite-dimensional quantum states, the communication cost is measured in terms of the number of qubits ...
arxiv +1 more source
Capacities of Quantum Amplifier Channels [PDF]
, 2017 Quantum amplifier channels are at the core of several physical processes. Not only do they model the optical process of spontaneous parametric down-conversion, but the transformation corresponding to an amplifier channel also describes the physics of the
Qi, Haoyu, Wilde, Mark M.
core +3 more sources
Experimental Quantum Switching for Exponentially Superior Quantum Communication Complexity. [PDF]
Physical Review Letters, 2018 Finding exponential separation between quantum and classical information tasks is like striking gold in quantum information research. Such an advantage is believed to hold for quantum computing but is proven for quantum communication complexity. Recently,
Kejin Wei +15 more
semanticscholar +1 more source
Optical designs for realization of a set of schemes for quantum cryptography [PDF]
Optical and Quantum Electronics 53 (2021) 206, 2020 Several quantum cryptographic schemes have been proposed and realized experimentally in the past. However, even with an advancement in quantum technology and escalated interest in the designing of direct secure quantum communication schemes there are not many experimental implementations of these cryptographic schemes. In this paper, we have provided a
arxiv +1 more source