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| Open AccessUniversality in long-distance geometry and quantum complexity
Many different homogeneous metrics on Lie groups, which may have markedly different short-distance properties, are shown to exhibit nearly identical distance functions at long distances, suggesting a large universality class of definitions of quantum complexity.
- Adam R. Brown
- , Michael H. Freedman
- & Leonard Susskind
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Article
| Open AccessAccommodating unobservability to control flight attitude with optic flow
Attitude can be extracted from optic flow when combined with a motion model that relates attitude to acceleration direction, which leads to stable flight attitude control with slight oscillations due to unobservable conditions.
- Guido C. H. E. de Croon
- , Julien J. G. Dupeyroux
- & Franck Ruffier
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Article |
Mechanical integrated circuit materials
A mechanical integrated circuit material based on Boolean mathematics and reconfigurable electrical circuits is created to demonstrate scalable information processing in synthetic, engineered soft matter.
- Charles El Helou
- , Benjamin Grossmann
- & Ryan L. Harne
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Article
| Open AccessQuantum computational advantage with a programmable photonic processor
Gaussian boson sampling is performed on 216 squeezed modes entangled with three-dimensional connectivity
5 , using Borealis, registering events with up to 219 photons and a mean photon number of 125.- Lars S. Madsen
- , Fabian Laudenbach
- & Jonathan Lavoie
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Article |
A system hierarchy for brain-inspired computing
The concept of neuromorphic completeness and a system hierarchy for neuromorphic computing are presented, which could improve programming-language portability, hardware completeness and compilation feasibility of brain-inspired computing systems
- Youhui Zhang
- , Peng Qu
- & Luping Shi
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Letter |
Experimentally generated randomness certified by the impossibility of superluminal signals
1,024 random bits that are uniformly distributed to within 10−12 and unpredictable assuming the impossibility of superluminal communication are generated and certified using a loophole-free Bell test.
- Peter Bierhorst
- , Emanuel Knill
- & Lynden K. Shalm
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Letter |
Image reconstruction by domain-transform manifold learning
Image reconstruction is reformulated using a data-driven, supervised machine learning framework that allows a mapping between sensor and image domains to emerge from even noisy and undersampled data, improving accuracy and reducing image artefacts.
- Bo Zhu
- , Jeremiah Z. Liu
- & Matthew S. Rosen
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Review Article |
Roads towards fault-tolerant universal quantum computation
The leading proposals for converting noise-resilient quantum devices from memories to processors are compared, paying attention to the relative resource demands of each.
- Earl T. Campbell
- , Barbara M. Terhal
- & Christophe Vuillot
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Letter |
Neuromorphic computing with nanoscale spintronic oscillators
Spoken-digit recognition using a nanoscale spintronic oscillator that mimics the behaviour of neurons demonstrates the potential of such oscillators for realizing large-scale neural networks in future hardware.
- Jacob Torrejon
- , Mathieu Riou
- & Julie Grollier
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Review Article |
Certified randomness in quantum physics
Quantum technology enables new methods for generating of randomness with minimal assumptions, certified by the violation of a Bell inequality, which opens up new theoretical and experimental research directions and leads to new challenges.
- Antonio Acín
- & Lluis Masanes
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Letter |
Exponential protection of zero modes in Majorana islands
The splitting of zero-energy Majorana modes in a tunnel-coupled InAs nanowire with epitaxial aluminium is exponentially suppressed as the wire length is increased, resulting in protection of these modes; this result helps to establish the robust presence of Majorana modes and quantifies exponential protection in nanowire devices.
- S. M. Albrecht
- , A. P. Higginbotham
- & C. M. Marcus
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Article |
Contextuality supplies the ‘magic’ for quantum computation
Quantum computing promises advantages over classical computing for certain problems; now ‘quantum contextuality’ — a generalization of the concept of quantum non-locality — is shown to be a critical resource that gives the most promising class of quantum computers their power.
- Mark Howard
- , Joel Wallman
- & Joseph Emerson
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Letter |
An exactly solvable model for quantum communications
An exactly solvable information-theoretical model of communications with a fully quantum electromagnetic field yields explicit expressions for all point-to-point capacities—the maximum possible rates of data transmission—of noisy quantum channels, with implications for quantum key distribution and fibre-optic communications.
- Graeme Smith
- & John A. Smolin
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News & Views |
An entangled walk of photons
By harnessing the quantum nature of light and guiding the light through a network of circuits integrated in a glass chip, it is possible to mimic fundamental particles undergoing a quantum walk.
- Jonathan C. F. Matthews
- & Mark G. Thompson
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Article |
Experimental demonstration of topological error correction
Fault-tolerant manipulation of quantum bits is demonstrated experimentally on an eight-photon cluster state using topological error correction.
- Xing-Can Yao
- , Tian-Xiong Wang
- & Jian-Wei Pan
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News & Views |
Entanglement as elbow grease
Quantum correlations have long been recognized as an informational resource for quantum communication and computation. It now seems that they can also do physical work. See Letter p.61
- Patrick Hayden
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News |
First sale for quantum computing
But critics say that D-Wave's system is still something of a black box.
- Zeeya Merali
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News |
Quantum computers move a step closer
Successes at entangling three-circuit systems brighten the prospects for solid-state quantum computing.
- Eugenie Samuel Reich
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News & Views |
The fragility of interdependency
A study of failures in interconnected networks highlights the vulnerability of tightly coupled infrastructures and shows the need to consider mutually dependent network properties in designing resilient systems.
- Alessandro Vespignani
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Letter |
Quantum simulation of the Dirac equation
The Dirac equation successfully merges quantum mechanics with special relativity. It predicts some peculiar effects such as 'Zitterbewegung', an unexpected quivering motion of a free relativistic quantum particle. This and other predicted phenomena are key fundamental examples for understanding relativistic quantum effects, but are difficult to observe in real particles. Here, using a single trapped ion set to behave as a free relativistic quantum particle, a quantum simulation of the one-dimensional Dirac equation is demonstrated.
- R. Gerritsma
- , G. Kirchmair
- & C. F. Roos