Results 31 to 40 of about 5,139,381 (338)
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
doaj +1 more source
Multiparameter Estimation with Two-Qubit Probes in Noisy Channels
Entropy, 2023 This work compares the performance of single- and two-qubit probes for estimating several phase rotations simultaneously under the action of different noisy channels.
Lorcán O. Conlon +2 more
doaj +1 more source
Equitable multiparty quantum communication without a trusted third party [PDF]
Phys. Rev. Applied 14, 064074 (2020), 2020 Multiparty quantum communication provides delightful applications including quantum cryptographic communication and quantum secret sharing. Measurement-Device-Independent (MDI) quantum communication based on the Greenberg-Horne-Zeilinger (GHZ) state measurement provides a practical way to implement multiparty quantum communication.
arxiv +1 more source
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
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
Secure Quantum Pattern Communication [PDF]
PRX Quantum 3, 010311 (2022), 2021 We propose a multi-mode modulation scheme for Continuous Variable (CV) quantum communications, which we call quantum pattern encoding. In this setting, classical information can be encoded into multi-mode patterns of discretely-modulated coherent states, which form instances of a communicable image space.
arxiv +1 more source
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
Machine learning for long-distance quantum communication [PDF]
PRX Quantum, 2019 Machine learning can help us in solving problems in the context big data analysis and classification, as well as in playing complex games such as Go.
J. Wallnöfer +3 more
semanticscholar +1 more source
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
core +2 more sources
End-to-end capacities of a quantum communication network [PDF]
Communications Physics, 2019 In quantum mechanics, a fundamental law prevents quantum communications to simultaneously achieve high rates and long distances. This limitation is well known for point-to-point protocols, where two parties are directly connected by a quantum channel ...
S. Pirandola
semanticscholar +1 more source