Harvard scientists have developed a groundbreaking photon router that creates an optical interface between light signals and superconducting microwave qubits, potentially solving a major quantum computing challenge by enabling different quantum systems to communicate efficiently without bulky wires, thus bringing distributed, fiber-optic-based quantum computers closer to reality.
Researchers have achieved a major quantum computing breakthrough by using a 56-qubit quantum computer to generate certifiably random numbers verified by classical supercomputers, marking a shift from theoretical quantum advantage to practical application with significant implications for cryptography, security, and fairness.
Princeton physicists accidentally discovered and directly visualized Hofstadter’s butterfly—a theoretical fractal pattern of electron energy levels predicted in 1976—using scanning tunneling microscopy on twisted bilayer graphene, revealing not only the long-sought fractal energy spectrum but also new quantum phenomena driven by electron interactions beyond Hofstadter’s original calculations.
D-Wave Quantum Inc. has achieved the world’s first demonstration of quantum computational supremacy on a useful real-world problem, using their Advantage2 prototype quantum annealer to perform complex magnetic materials simulations in minutes that would take a classical supercomputer nearly one million years and consume more than the world’s annual electricity.
Researchers at China’s USTC have developed Zuchongzhi-3, a groundbreaking 105-qubit quantum computer that processes calculations 10^15 times faster than the most powerful supercomputers and one million times faster than Google’s latest quantum systems, marking a significant advancement in quantum supremacy.
npj Quantum Information, Published online: 05 November 2024; doi:10.1038/s41534-024-00912-y Time-optimal control of a solid-state spin amidst dynamical quantum wind Time-optimal control holds promise across the full spectrum of quantum technologies, where the rapid generation of […]
npj Quantum Information, Published online: 02 November 2024; doi:10.1038/s41534-024-00910-0 Qubit teleportation between a memory-compatible photonic time-bin qubit and a solid-state quantum network node This paper reports on a quantum interface linking a diamond NV center […]
npj Quantum Information, Published online: 02 November 2024; doi:10.1038/s41534-024-00898-7 An architecture for two-qubit encoding in neutral ytterbium-171 atoms In this paper, researchers present an architecture for encoding two qubits within the optical “clock” transition and […]
A team of researchers from the Munich Quantum Valley, led by the Max Planck Institute of Quantum Optics in collaboration with the quantum computing start-up planqc, has succeeded in running a register of 1200 atoms continuously for over an hour.
npj Quantum Information, Published online: 31 October 2024; doi:10.1038/s41534-024-00878-x Gate-defined quantum dots are a promising candidate system for realizing scalable, coupled qubit systems and serving as a fundamental building block for quantum computers. However, present-day […]
Theorists at the Max Planck Institute of Quantum Optics have made a significant stride in the field of quantum computing. Their research addresses a long-standing question: can quantum computers really outperform classical computers in solving […]
Lower cooling requirements, longer operating times, lower error rates: Quantum computers based on spin photons and diamond promise significant advantages over competing quantum computing technologies. The consortium of the BMBF project SPINNING coordinated by Fraunhofer […]
npj Quantum Information, Published online: 26 October 2024; doi:10.1038/s41534-024-00904-y Robust projective measurements through measuring code-inspired observables Quantum measurements are ubiquitous in quantum information processing tasks, but errors can render their outputs unreliable. Here, researchers present […]
npj Quantum Information, Published online: 26 October 2024; doi:10.1038/s41534-024-00891-0 Extending radiowave frequency detection range with dressed states of solid-state spin ensembles Quantum sensors using solid-state spin defects excel in the detection of radiofrequency (RF) fields, […]
Scientists have used high-performance computing at large scales to analyze a quantum photonics experiment. In specific terms, this involved the tomographic reconstruction of experimental data from a quantum detector. Read More Quantum Computers News — […]
Flux attachment provides a powerful conceptual framework for understanding certain forms of topological order, including most notably the fractional quantum Hall effect. Despite its ubiquitous use as a theoretical tool, directly realizing flux attachment in […]
Hole-based spin qubits in strained planar germanium quantum wells have received considerable attention due to their favorable properties and remarkable experimental progress. The sizeable spin-orbit interaction in this structure allows for efficient qubit operations with […]
Predicting the behavior of many interacting quantum particles is a complicated process but is key to harness quantum computing for real-world applications. Researchers have developed a method for comparing quantum algorithms and identifying which quantum […]
A new study opens the door to cutting-edge solutions that could contribute to the realization of a system capable of processing quantum information in a simple yet powerful way. The work presents a method for manipulating the photonic states of light in a never-before-seen way, offering greater control over the evolution of photon propagation. This control makes it possible to improve the detection and number of photon coincidences, as well as the efficiency of the system.
A paper has solved a major hurdle facing researchers working with diamond by creating a novel way of bonding diamonds directly to materials that integrate easily with either quantum or conventional electronics. With this technique, […]
npj Quantum Information, Published online: 14 October 2024; doi:10.1038/s41534-024-00892-z Extending the computational reach of a superconducting qutrit processor Quantum computing with qudits is an emerging approach that exploits a larger, more connected computational space, providing […]
npj Quantum Information, Published online: 11 October 2024; doi:10.1038/s41534-024-00889-8 Pseudo twirling mitigation of coherent errors in non-Clifford gates The conventional circuit paradigm, utilizing a small set of gates to construct arbitrary quantum circuits, is hindered […]
Scientists have used light to visualize magnetic domains, and manipulated these regions using an electric field, in a quantum antiferromagnet. This method allows real-time observation of magnetic behaviors, paving the way for advancements in next-generation […]
Researchers have developed and demonstrated a technique that allows them to engineer a class of materials called layered hybrid perovskites (LHPs) down to the atomic level, which dictates precisely how the materials convert electrical charge […]
New Hub focussing on quantum sensing, imaging and timing to be launched as part of £160 million investment.
npj Quantum Information, Published online: 10 October 2024; doi:10.1038/s41534-024-00895-w Generalised Kochen–Specker theorem for finite non-deterministic outcome assignments The Kochen–Specker (KS) theorem is a cornerstone result in quantum foundations, establishing that quantum correlations in Hilbert spaces […]
A research team has devised a unique method to observe changes in materials at the atomic level. The technique opens new avenues for understanding and developing advanced materials for quantum computing and electronics.
Researchers have just described the existence of the paradoxical Mpemba effect within quantum systems. Initially investigating out of pure curiosity, the discovery has bridged the gap between Aristotle’s observations two millennia ago and modern-day understanding, and opened the door to a whole host of ‘cool’ — and ‘cooling’ — implications.
Unearthing new LEDs, solar cells, and photodetectors requires extensive knowledge surrounding the optical properties of materials. Calculating these takes time and resources. Yet researchers unveiled a new AI tool that can accurately, and crucially much faster than quantum simulations, for predicting optical properties.
How well can multiple incompatible observables be implemented by a single measurement? This is a fundamental problem in quantum mechanics with wide implications for the performance optimization of numerous tasks in quantum information science. While […]