Results 41 to 50 of about 49,915 (309)
Coherent control of a donor-molecule electron spin qubit in silicon
Nature Communications, 2021 Multi-donor molecules in Si provide a promising qubit platform, offering advantages over single donor qubits in terms of performance and fabrication. Here, the authors report a single qubit gate and long coherence times in a P donor molecule qubit in ...
Lukas Fricke +8 more
doaj +1 more source
Surpassing the no-cloning limit with a heralded hybrid linear amplifier for coherent states
Nature Communications, 2016 Cloning an unknown quantum state is challenging and the limit on the quality of clones is set by the no-cloning theorem. Here, the authors demonstrated the surpassing of such a limit using an effective quantum cloner based on a hybrid probabilistic ...
Jing Yan Haw +8 more
doaj +1 more source
QUANTUM HOLONOMIES FOR QUANTUM COMPUTING [PDF]
International Journal of Modern Physics B, 2001 Holonomic Quantum Computation (HQC) is an all-geometrical approach to quantum information processing. In the HQC strategy information is encoded in degenerate eigen-spaces of a parametric family of Hamiltonians. The computational network of unitary quantum gates is realized by driving adiabatically the Hamiltonian parameters along loops in a control ...
Pachos, Jiannis, Zanardi, Paolo
openaire +3 more sources
, 1997 We describe how physics of computation determines computational complexity. In particular we show how quantum phenomena lead to qualitatively new modes of computation. An ideal quantum computer would allow to face certain tasks out of reach of classical computers, the factorization problem being the most striking example.
Barenco, A, Huelga, S, Ekert, A
openaire +4 more sources
Extending Quantum Error Correction: New Continuous Measurement Protocols and Improved Fault-Tolerant Overhead [PDF]
, 2004 Quantum mechanical applications range from quantum computers to quantum key distribution to teleportation. In these applications, quantum error correction is extremely important for protecting quantum states against decoherence.
Ahn, Charlene Sonja
core +1 more source
Quantum computers, quantum computing, and quantum thermodynamics
Frontiers in Quantum Science and TechnologyQuantum thermodynamics aims to extend standard thermodynamics and non-equilibrium statistical physics to systems with sizes well below the thermodynamic limit. It is a rapidly evolving research field that promises to change our understanding of the foundations of physics, while enabling the discovery of novel thermodynamic techniques and applications ...
Fabrizio Cleri, Fabrizio Cleri
openaire +4 more sources
Investigations in Quantum Computing: Causality and Graph Isomorphism [PDF]
, 2004 In this thesis I explore two different types of limits on the time complexity of quantum computation---that is, limits on how much time is required to perform a given class of quantum operations on a quantum system. Upper limits can be found by explicit
Beckman, David Eugene
core +1 more source
Quantum Information and Computation [PDF]
, 2023 Quantum technology can break through the bottleneck of traditional information technology by ensuring information security, speeding up computation, improving measurement accuracy, and providing revolutionary solutions to some issues of economic and ...
Ming Li, Shunlong Luo, Shao-Ming Fei
core +1 more source
Programmable quantum circuits in a large-scale photonic waveguide array
npj Quantum InformationOver the past decade, integrated quantum photonic technologies have shown great potential as a platform for studying quantum phenomena and realizing large-scale quantum information processing.
Yang Yang +6 more
doaj +1 more source
Experimental noiseless linear amplification using weak measurements
New Journal of Physics, 2016 The viability of quantum communication schemes rely on sending quantum states of light over long distances. However, transmission loss can degrade the signal strength, adding noise.
Joseph Ho +3 more
doaj +1 more source