Quantum information articles from across Nature Portfolio

Contextuality is a fundamental resource for quantum information processing, underpinning quantum entanglement. Here, the authors experimentally demonstrate the asymmetrical relationship between contextuality and entanglement using polarization-entangled photons, revealing the noninjective nature of their mapping and advancing methods to explore quantum properties.

Experimental demonstration of quantum error-correcting codes combined with error detection and post-selection applied to a trapped-ion quantum processor shows improvements in logical error rates ranging from 11× to 800× compared with several physical circuit baselines.

Researchers realize a fermionic Laughlin state on a digital quantum processor and verify its key topological signatures, opening a route to simulating strongly correlated topological quantum matter on digital hardware.

Estimating nonlinear functions of quantum states is essential for quantum information processing but often computationally expensive. The quantum state function framework estimates a degree-n polynomial of a quantum state with \({{{\mathcal{O}}}}(n/{\varepsilon }^{2})\) copies without purified query access, enabling practical entropy, fidelity, and eigenvalue estimation.

Electrical engineering research at Daegu Gyeongbuk Institute of Science and Technology (DGIST) integrates physical AI, human digital twin and quantum sensing with advanced semiconductor fabrication and quantum-dot optoelectronics, translating innovation in nanoscale materials into scalable sensing and imaging technologies for next-generation intelligent systems.

The tech giant says it will make ‘topological’ quantum computers that can be scaled up faster than competing technologies.

Mobile quantum bits, which can be shuttled to where they are needed in a circuit, have been used to perform a quantum process called state teleportation.

Specialized quantum memories will be required to achieve quantum speedups for data-intensive problems. Now, a proof-of-principle demonstration of such a quantum memory has been performed with a superconducting processor.

Quantum machines are making inroads into biology but have no ‘advantage’ over classical machines yet.

Two analyses suggest that quantum computers could crack ubiquitous security keys and cryptocurrencies before the decade is over.