High-precision quantum gates with diamond spin qubits

High-precision quantum gates with diamond spin qubits

QuTech researchers, collaborating with Fujitsu and Element Six, have achieved a significant quantum computing milestone by demonstrating diamond spin-based quantum gates with error rates below 0.1%—satisfying a critical threshold for quantum error correction and bringing us one step closer to scalable quantum computation.

Nonlinear superconducting resonator circuit for investigating dissipative phase transitions. Credit: Guillaume Beaulieu (EPFL)

Quantum Leap: New Phase Transitions Stabilize Computing

Researchers successfully observed “dissipative phase transitions” in quantum systems using a superconducting Kerr resonator at near-absolute zero temperatures, revealing phenomena like “squeezing,” metastability, and “critical slowing down” that could revolutionize quantum computing and sensing technologies through enhanced stability and precision.

QIA researchers create first Operating System for Quantum Networks

QNodeOS: Revolutionizing Quantum Networks

Researchers from the Quantum Internet Alliance have created QNodeOS, the first operating system for quantum networks, which abstracts hardware complexity to enable easier development of quantum networking applications across different hardware platforms, marking a crucial step toward making quantum internet technology accessible and practical.

In the new method, two boron nitride (n-BN) layers twisted with respect to each other create an electric field in a molybdenum diselenide semiconductor (MoSe2). A light beam (red) is used to study the properties of the electrons in the semiconductor. Credit: ETH Zurich

Harnessing Coulomb Interactions in Nanoscale Ferroelectric Moiré Structures

Researchers created a nanoscale ferroelectric moiré pattern using hexagonal boron nitride layers to generate a purely electrostatic potential that enhances Coulomb interactions in transition metal dichalcogenides, enabling optical detection of electron correlations and ordered states while opening pathways to explore exotic quantum phenomena like chiral layer-pseudospin liquids and kinetic magnetism.

Quantum Inspire 2.0 is live with updated software and hardware

Quantum Inspire 2.0 is live at QuTech

Quantum Inspire 2.0, Europe’s only freely accessible quantum cloud computer, now features an enhanced user interface, SDK integration, quantum-classical computing functionality, and two upgraded quantum processors—Starmon-7 and Spin2+—with improved qubit fidelity and performance, positioning the Netherlands at the forefront of quantum computing innovation.

Emergence of opposing arrows of time in open quantum systems

Time May Flow Both Ways: Quantum Physics Reveals New Truth

A groundbreaking study from the University of Surrey reveals that time at the quantum level may flow in both directions, as researchers discovered a mathematical “memory kernel” in open quantum systems that maintains time symmetry even when considering energy dissipation into the universe, challenging our conventional understanding of time’s unidirectional nature.

Anahita Khodadad Kashi and Prof. Dr. Michael Kues demonstrated for the first time entanglement-based quantum key distribution using the frequency degree of freedom to enable scalable quantum networks. Credit: Leibniz University Hannover

Light-Based Quantum Networks: A Breakthrough in Secure Data

Scientists at Leibniz University Hannover have developed a cost-effective quantum network security system using frequency-bin coding of light particles, which reduces complexity and equipment costs by 75% while enhancing security against quantum computer threats through a simplified single-detector design that enables dynamic, scalable quantum key distribution.

Quantum imaging protocol with photon pairs from a nonlinear metasurface.

Quantum Imaging Revolution: Metasurfaces Break Resolution Limits

Scientists at the ARC Centre of Excellence for Transformative Meta-Optical Systems have developed a groundbreaking quantum imaging technique using an ultra-thin nonlinear metasurface that generates spatially entangled photon pairs, eliminating the need for mechanical scanning and achieving resolution four orders of magnitude better than conventional systems, paving the way for compact quantum imaging applications in LiDAR, secure communication, and advanced sensing.

Quantum spin liquids (QSLs) are states of matter where spins remain entangled and fluctuate, never forming a traditional magnetic order. Credit: Yasuyuki Ishii from Shibaura Institute of Technology, Japan

New Dimensions in Quantum Spin Liquid

A team of researchers led by Professor Yasuyuki Ishii discovered that β’-EtMe3Sb[Pd(dmit)2]2, previously thought to be a two-dimensional quantum spin liquid, actually exhibits one-dimensional spin behavior, challenging conventional understanding and potentially impacting future quantum computing applications.

Professor Johannes Fink at the Institute of Science and Technology Austria (ISTA): A team of physicists from his group achieved a fully optical readout of superconducting qubits. Credit: © Nadine Poncioni | ISTA

Fiber Optics: The Missing Link in Quantum Computing’s Future

ISTA physicists have developed a breakthrough method to connect superconducting qubits using fiber optics instead of traditional electrical signals, significantly reducing cooling requirements and potentially enabling the scaling and networking of quantum computers by converting optical signals to microwave frequencies that qubits can process.

The two PSI physicists Andreas Läuchli (left) and Andreas Elben were involved in developing a new type of digital-analogue quantum simulator. Credit: © Paul Scherrer Institute PSI/Mahir Dzambegovic

Google’s Hybrid Digital-Analog Quantum Simulator Breaks New Ground

Researchers at Google and PSI have developed a revolutionary quantum simulator that combines digital precision with analog modeling capabilities, enabling unprecedented studies of complex physical phenomena through a versatile 69-qubit system that can both precisely control initial conditions and naturally simulate physical interactions, opening new possibilities in fields ranging from materials science to astrophysics.

Dougal Main and Beth Nichol working on the distributed quantum computer. Credit John Cairns

Breakthrough in Distributed Quantum Computing

Physicists achieved a quantum computing breakthrough by successfully connecting separate quantum processors through photonic links, enabling quantum teleportation of logical gates between modules and demonstrating the first distributed quantum computer system, which could potentially scale up without the limitations of cramming millions of qubits into a single device.

Emergence of a Second Law of Thermodynamics in Isolated Quantum Systems (Credit: TU Wien)

How Shannon Entropy Bridges Classical and Quantum Physics

Researchers resolved the apparent paradox between quantum mechanics and classical thermodynamics by demonstrating that while von Neumann entropy remains constant in quantum systems, Shannon entropy increases over time just as classical entropy does, thereby reconciling quantum theory with the second law of thermodynamics.

Ashish Moharana, PhD student in the research group of Professor Angela Wittmann, in front of the experimental setup. Credit: Shaktiranjan Mohanty

Electron Spin Control Through Chiral Molecules

Recent research at Johannes Gutenberg University Mainz has demonstrated that chiral molecules placed on gold surfaces can effectively control electron spin direction based on their handedness (left or right), offering a promising alternative to traditional magnetic methods for developing more efficient electronic devices.

Supramolecular dyads as photogenerated qubit candidates

Hydrogen Bonds Enable New Approach to Spin Qubit Assembly

Scientists have made a transformative discovery in quantum computing that challenges long-held assumptions about spin qubit assembly. The breakthrough research demonstrates that hydrogen bonds can effectively facilitate spin interactions between qubit components.

Quantum algorithms with a universal gate set.

Dynamic Quantum Error Correction Enables Real-Time Code Switching

Researchers have developed a groundbreaking method enabling quantum computers to switch between different error correction codes during computation, overcoming a fundamental limitation in quantum computing where no single code can efficiently perform all necessary operations while maintaining error protection.

SiGeSn/GeSn multi-quantum-well structure.

Group IV Laser Bridges Silicon-Photonics Gap

In a groundbreaking development published in Nature Communications, an international research team has created the first electrically pumped continuous-wave semiconductor laser compatible with silicon integration. The device, constructed from group IV elements using stacked layers of silicon-germanium-tin and germanium-tin, operates with minimal power requirements comparable to an LED.