The researchers demonstrated the first complete implementation of entanglement-based quantum key distribution using frequency-bin encoding on a silicon photonic chip, overcoming phase noise challenges to achieve stable transmission over 26 kilometers of fiber with a secure key rate of at least 4.5 bits per second.
Researchers have demonstrated that quantum information encoded in topological skyrmions remains resilient to environmental noise even as entanglement deteriorates, representing a breakthrough “digitization” approach that could revolutionize practical quantum technologies without requiring complex compensation strategies.
This research fully maps the statistical outcomes of quantum entanglement, enabling complete description of partially entangled states through mathematical transformation, establishing theoretical limits of quantum physics while opening new avenues for secure quantum testing, communications, and computing without requiring assumptions about device properties.
Researchers have successfully created quantum holograms using metasurfaces, enabling unprecedented control over entangled photon pairs where the polarization of one photon can selectively erase holographic content in its partner, demonstrating precise quantum control with applications in secure communication and anti-counterfeiting technology.
Researchers from Chinese universities have revolutionized quantum computing by developing metasurfaces that generate and manipulate entangled photons more efficiently than traditional methods, potentially enabling smaller quantum computers and robust quantum networks.
Researchers have achieved a breakthrough in quantum networking by creating a two-node system with multiple rare-earth ions per node that enables multiplexed entanglement distribution and multipartite state preparation, overcoming traditional single-qubit limitations and laying the groundwork for scalable quantum networks with applications in computing, communication, and sensing.
Researchers developed and experimentally validated a neural network-based protocol that can efficiently measure quantum entanglement in large systems (up to 100 qubits) using only local measurements, while also predicting future entanglement dynamics beyond the measurement window.
A QuTech research team demonstrated initialization, readout, and universal control of four qubits created from eight germanium quantum dots, achieving quantum information transfer with 75% Bell state fidelity and establishing a versatile platform for quantum computing advancement.
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.
Scientists at Oak Ridge National Laboratory successfully transmitted entangled quantum signals without interruption over a commercial fiber-optic network using automatic polarization compensation, marking a crucial advance toward practical quantum internet development.
Researchers have developed a groundbreaking universal model that uses quantum entanglement to explain how particles emerge from high-energy proton collisions, successfully matching experimental data from the HERA accelerator and potentially transforming our understanding of nuclear physics through future testing at facilities like the Electron-Ion Collider.
This research explores how atoms interact through light exchange to enhance quantum entanglement, focusing on a novel approach using multi-level atomic systems.
Scientists have introduced a new EACC scheme capable of correcting a fixed number of erasures/errors. It can be adjusted to the available amount of entanglement and sends classical information over a quantum channel.
Northwestern University researchers discovered that quantum networks can be maintained by adding just the square root number of new connections relative to total users after each communication event, offering a surprisingly efficient solution to the challenge of quantum links disappearing once used.
Researchers have developed a simulation algorithm for distillation circuits with per-gate complexity of O(1) , drastically faster than O(N) Clifford simulators or O(2N) wavefunction simulators over N qubits.
This work represents the embodiment of the long-sought goal of bridging macroscopic and microscopic nonlinear and quantum optics,” says Schuck, who co-directs Columbia’s MS in Quantum Science and Technology. “It provides the foundation for scalable, highly efficient on-chip integrable devices such as tunable microscopic entangled-photon-pair generators.
Quantum entanglement is a remarkable phenomenon where two particles become interconnected, so that the state of one instantly affects the other, no matter how far apart they are. This unique property is a cornerstone of quantum computing and a range of advanced technological applications. While entanglement has been achieved with atoms, achieving it with complex molecules is a significant step forward because molecules offer additional structures and properties, such as vibration and rotation, that can be leveraged in advanced quantum applications.
Physicists at Osaka Metropolitan University developed simplified formulas to quantify quantum entanglement between selected atoms and their environment in strongly correlated electron systems, revealing unexpected quantum interaction patterns that could advance quantum technologies.
Trapped ions have previously only been entangled in one and the same laboratory. Now, teams have entangled two ions over a distance of 230 meters. The nodes of this network were housed in two labs at the Campus Technik to the west of Innsbruck, Austria. The experiment shows that trapped ions are a promising platform for future quantum networks that span cities and eventually continents.
In a new breakthrough, researchers have solved a problem that has caused quantum researchers headaches for years. The researchers can now control two quantum light sources rather than one. Trivial as it may seem to those uninitiated in quantum, this colossal breakthrough allows researchers to create a phenomenon known as quantum mechanical entanglement. This in turn, opens new doors for companies and others to exploit the technology commercially.
When two microscopic systems are entangled, their properties are linked to each other irrespective of the physical distance between the two. Manipulating this uniquely quantum phenomenon is what allows for quantum cryptography, communication, and computation. While parallels have been drawn between quantum entanglement and the classical physics of heat, new research demonstrates the limits of this comparison. Entanglement is even richer than we have given it credit for.
Researchers have demonstrated a way to entangle atoms to create a network of atomic clocks and accelerometers. The method has resulted in greater precision in measuring time and acceleration.
Researchers have successfully demonstrated the transport of two-photon quantum states of light through a phase-separated Anderson localization optical fiber.
Researchers from Paderborn and Ulm Universities have developed the first programmable optical quantum memory that can dynamically switch between storage, interference, and release modes, enabling the efficient particle-by-particle creation of entangled quantum states—a breakthrough that outperforms previous methods and brings practical quantum technology applications significantly closer to reality.
A new study describes how machine learning tools, run on classical computers, can be used to make predictions about quantum systems and thus help researchers solve some of the trickiest physics and chemistry problems.