Results 21 to 30 of about 362,057 (331)
npj Quantum Information, 2021 Finding the optimal attainable precisions in quantum multiparameter metrology is a non-trivial problem. One approach to tackling this problem involves the computation of bounds which impose limits on how accurately we can estimate certain physical ...
Lorcán O. Conlon +3 more
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Quantum broadcast communication [PDF]
, 2006 Broadcast encryption allows the sender to securely distribute his/her secret to a dynamically changing group of users over a broadcast channel. In this paper, we just consider a simple broadcast communication task in quantum scenario, which the central ...
Beige A +21 more
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Enhancing quantum teleportation efficacy with noiseless linear amplification
Nature Communications, 2023 Quantum teleportation constitutes a fundamental tool for various applications in quantum communication and computation. However, state-of-the-art continuous-variable quantum teleportation is restricted to moderate fidelities and short-distance ...
Jie Zhao +8 more
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Quantum optical waveform conversion [PDF]
, 2010 Currently proposed architectures for long-distance quantum communication rely on networks of quantum processors connected by optical communications channels [1,2].
A. P. Vandevender +3 more
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Discriminating mixed qubit states with collective measurements
Communications Physics, 2023 It is a central fact in quantum mechanics that non-orthogonal states cannot be distinguished perfectly. In general, the optimal measurement for distinguishing such states is a collective measurement.
Lorcán O. Conlon +3 more
doaj +1 more source
Quantum Forbidden-Interval Theorems for Stochastic Resonance [PDF]
, 2008 We extend the classical forbidden-interval theorems for a stochastic-resonance noise benefit in a nonlinear system to a quantum-optical communication model and a continuous-variable quantum key distribution model.
Bart Kosko +13 more
core +3 more sources
Substituting Quantum Entanglement for Communication [PDF]
, 1997 We show that quantum entanglement can be used as a substitute for communication when the goal is to compute a function whose input data is distributed among remote parties.
A. Einstein +6 more
core +2 more sources
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
, 2023 The second quantum revolution has been picking up momentum over the last decade. Quantum technologies are starting to attract more attention from governments, private companies, investors, and public. The ability to control individual quantum systems for the purpose of information processing and communication is no longer a theoretical dream, but is ...
Hajdušek, Michal, Van Meter, Rodney
openaire +2 more sources
Heliyon, 2021 We have experimentally created a robust, ultrabright and phase-stable polarization-entangled state close to maximally entangled Bell-state with %98-fidelity using the type-II spontaneous parametric down-conversion (SPDC) process in periodically-poled ...
Ali Motazedifard +3 more
doaj +1 more source