Articles tagged with Quantum Entanglement
A recent study published in PRX Quantum reveals that quantum machine learning algorithms are hindered by excessive entanglement, leading to a phenomenon known as barren plateaus. By limiting depth and connectivity, researchers propose a solution to avoid these regimes and successfully train quantum neural networks.
Researchers at University of Copenhagen have developed a new quantum circuit that can operate and measure all four qubits simultaneously. This breakthrough resolves a significant engineering headache in the development of large functional quantum computers.
Researchers at the University of Rochester have generated an incredibly large bandwidth using a thin-film nanophotonic device, overcoming limitations of existing devices. The breakthrough could advance metrology, sensing, and quantum networks.
The 'strange metal' state in high-temperature superconductors exhibits a linear function of temperature, suggesting the involvement of quantum entanglement. By suppressing charge density waves, researchers were able to restore this state, expanding its range and offering a promising new avenue for research.
Researchers from Nagoya University have found a dynamical one-parameter scaling for surface roughness and entanglement entropy in random quantum systems. This discovery has implications for understanding nonequilibrium physics and classifying universal phenomena.
Experts successfully connect quantum computers and sensors on a practical scale, enabling entanglement-based quantum communications. The team demonstrated scalability of entanglement-based protocols across three remote nodes using flexible grid bandwidth provisioning.
The Quantum Sensors project aims to create ultrasensitive gyroscopes and accelerometers using quantum states, enabling precise measurements for self-driving cars and spacecraft. This technology could capture information not provided by GPS, improving navigation and stability in various environments.
Researchers found that quantum mechanics' influence on particles affects light emission, demonstrating wavefunction collapse and altering interference patterns. The study sheds new light on the counter-intuitive phenomenon, revealing a direct connection between light emission and quantum entanglement.
A team of researchers at Bristol's Quantum Engineering and Technology Labs has developed a silicon photonic chip that can protect quantum bits from errors using photons. This breakthrough could lead to the creation of more powerful quantum computers by reducing the fragility of qubits.
Researchers at RIT have developed a new method for detecting superfluid motion that is minimally destructive, in situ, and in real-time. The technique uses laser light to detect the frequency of superfluid rotation, enabling scientists to study superfluids without disrupting their motion.
A team at TU Wien developed a new quantum transmission protocol using eight different paths for each photon, generating a record-breaking entanglement-based quantum key. This protocol is more robust against interference and allows for faster data transmission.
A new approach to generating quantum-entangled photon pairs uses nonlinear metasurfaces to enhance and tailor photon emissions. The researchers achieved a five-order-of-magnitude increase in the brightness of entangled photons, with a highly configurable platform that can control entanglement and direction.
Researchers investigate using classical thermal light sources for quantum applications, including teleportation and novel imaging. A new protocol is proposed to exploit the non-entangled yet non-classical state of two-photon OAM for high-dimensional image transmission.
The DTU researchers have developed a universal measurement-based optical quantum computer platform, enabling the execution of any arbitrary algorithm. The platform is scalable to thousands of qubits and can be connected directly to a future quantum Internet.
Researchers at Nagoya City University have detected strongly entangled pair of protons on a nanocrystalline silicon surface. This breakthrough could enable the creation of more qubits and ultra-fast processing for supercomputing applications, revolutionizing quantum computing.
Researchers at NIST have created a quantum crystal sensor that can measure electric fields with unprecedented sensitivity, potentially revolutionizing dark matter detection. By entangling the mechanical motion and electronic properties of tiny ions, the sensor can detect subtle vibrations caused by dark matter particles.
Researchers at Oak Ridge National Laboratory are advancing various technologies to minimize oil leaks, enable 3D printing in space, and increase fuel efficiency from ethanol. They have developed a quantum sensing system to detect pipeline leaks more quickly, built a thermal protection shield for a capsule launched into space, and creat...
A team of scientists proposes a way to control all properties of photonic qubits using modulated quantum metasurfaces. This technology could enable secure communication, sensing and imaging, as well as harnessing energy from photons.
The documentary highlights key sustainability topics, including reducing energy requirements for complex computations and minimizing quantum computing's own environmental impact. Industry leaders from global tech giants to start-ups assess the industry's potential to address global sustainability issues.
Researchers have discovered a quantum phase transition in a quasi-2D system consisting purely of spins, which has significant implications for spintronics and quantum computing. The study reveals unexpected manifestations of quantum phase transitions in pure spin systems.
Researchers at Aalto University have successfully created heavy fermions in graphene, a non-radioactive alternative to rare-earth compounds. This discovery could pave the way for sustainable exploitation of heavy fermion physics in quantum technologies.
By briefly delocalizing particles over exponentially larger distances, researchers can harness the quantum nature of nanoparticles. This technique also enables highly sensitive instruments to determine forces such as gravity with high precision.
Research from Washington University in St. Louis has found an efficient two-bit quantum logic gate that uses a new form of light, increasing efficiency by orders of magnitude. The discovery was made possible by the unique features of measurement and the existence of photonic dimers.
Researchers at NUST MISIS and other institutions have experimentally proved the existence of a new type of quasiparticle - doublon topological excitations - in qubit chains. This discovery could be a step towards disorder-robust quantum metamaterials.
Researchers have developed a more efficient method for measuring entanglement in quantum simulators, allowing for new insights into the structure of the quantum state. The new protocol uses insights from quantum field theory to perform tomography with significantly fewer measurements.
Scientists at the University of Innsbruck built a compact ion trap quantum computer with up to 50 individually controllable quantum bits. The device, funded by various organizations, aims to demonstrate the feasibility of quantum computing in data centers.
Researchers developed a new hybrid computing approach, combining reliability of classical computers with strength of quantum systems. This method enables near-term applications and discoveries in fields like carbon dioxide removal and pharmaceutical design.
University of Queensland researchers have created a quantum microscope that can see biological structures impossible to detect with traditional light-based microscopes. The device uses quantum entanglement to provide 35% improved clarity without destroying cells, enabling minute biological structure observation.
Physicists propose an experiment using entangled quantum systems in free fall to detect movements and test if gravity is a quantum phenomenon. The system can also be used to detect space debris, tectonic movements, and burglars, with potential applications for early earthquake warnings and movement sensors.
Researchers at ETH Zurich have developed a new approach to prove the robustness conditions of certain quantum-based machine learning models, guaranteeing reliable results. The team's work explores protection against errors and hackers, paving the way for more accurate and trustworthy quantum machine learning applications.
Researchers at Heriot-Watt University have demonstrated the first quantum-secure conversation between four parties simultaneously, using Quantum Key Distribution and multi-party entanglement to share keys securely. This breakthrough has potential to drastically reduce resource costs for conference calls in quantum networks.
Researchers created an atom chip interferometer that can detect quantum gravity effects by studying interference patterns between atoms. The device has the potential to prove whether gravity is a quantum phenomenon.
Researchers developed a method to enhance collection efficiency of single QDs using 3D printed micro-lenses, achieving intensity enhancements up to 2.1 and 26% in fibre-coupling validation. A standalone fibre-coupled device was also realised, opening the route to stable stand-alone devices.
Researchers achieved scalable, telecom-heralded matter-matter entanglement between two remote, multimode and solid-state quantum memories, stored in different labs separated by 10 meters. This landmark experiment paves the way for long-distance quantum communication and operation of quantum repeaters.
Researchers at USTC develop a multiplexed quantum repeater using absorptive quantum memories, achieving high-fidelity entanglement swapping and accelerating entanglement distribution. This breakthrough provides a feasible roadmap for practical quantum repeaters and high-speed quantum networks.
Researchers experimentally show that quantum methods have an advantage over classical counterparts in sensor classification, reducing errors by a small margin. The discovery opens up possibilities for real-world applications such as biomedical imaging and autonomous driving.
Researchers have discovered a new mechanism in magnetic compounds that couples multiple topological bands, significantly enhancing the effects of quantum phenomena. The coupling leads to an anomalous Hall effect, where spontaneous symmetry breaking causes a transverse acceleration of electron currents.
Researchers at Delft University of Technology intercept a chat between two atoms, demonstrating perfect superposition and entangled quantum states. This breakthrough has significant implications for research on quantum bits and may lead to new experimental possibilities.
The team achieved the first experimental demonstration of quantum information masking, a new protocol for transferring quantum information between multiple carriers. The fidelity of the entangled state was 97.7%, enabling secure transmission of simple images for three-party quantum secret sharing.
Experimental results provide hard evidence for spin-charge separation in electrons, a long-theorized concept by Philip Anderson. The study confirms the presence of spinons, which are thought to be composed of two particles: one bearing negative charge and another containing spin.
A new theorem limits the use of quantum machine learning to learn processes like black holes, highlighting its fundamental limits. However, most physical processes are structured enough that they don't resemble random ones, making the impact less severe.
Researchers at Aalto University have successfully evaded the uncertainty principle by measuring the position and momentum of vibrating drumheads. This experiment allows for the characterization of extremely weak forces and provides evidence of quantum entanglement in macroscopic objects.
Researchers at NIST successfully entangled two small aluminum drums, measuring the subtle statistical relationships between their motions. They analyzed radar-like signals to verify the fragile entanglement, demonstrating a new capability in large-scale quantum networks.
Researchers have successfully demonstrated direct observation and measurement of quantum entanglement at a macroscopic scale using vibrating membranes. This breakthrough enables the extension of measurements to larger systems, with potential implications for quantum computing and fundamental physics research.
Researchers at the University of Basel have proposed a new scheme for measuring magnetic or electric fields using quantum steering, which enhances measurement precision. By analyzing entangled particle states, scientists can make more accurate predictions about possible measurement results.
Researchers used broadband electron spin resonance spectroscopy to study the properties of spins in a triangular lattice compound. They found that magnetic moments do not arrange themselves in an up-down pattern, contradicting the existence of quantum spin liquids.
Researchers from QuTech in the Netherlands have established the first multi-node quantum network, connecting three quantum processors and achieving proof-of-principle demonstration of key quantum network protocols. The breakthrough enables the creation of a scalable quantum network that can distribute quantum information over large dis...
Scientists quantify space-time nonseparability of electromagnetic pulses using quantum state tomography and calculate fidelity, concurrence, and entanglement. They propose novel concepts for measuring space-time entanglement in structured light, opening new avenues for ultrahigh-capacity communication and high-security encryption.
Archana Kamal, a physics professor at UMass Lowell, has received over $1 million in funding from the NSF and Air Force for her research on quantum information processing. Her project aims to develop self-correcting qubits using quantum reservoir engineering to address decoherence issues.
Harvard University researchers have extended the lifespan of a dipolar molecule, enabling stable qubits for quantum computing and simulation applications. The new method allows for controlled individual atom interactions, granting scientists a key resource for molecule-based quantum information processing.
Researchers have revealed conditions for robust entangled states transport in photonic topological insulators. They identify physical mechanisms and thresholds for maximizing entanglement while preserving topological protection.
A new type of bi-molecule formed from two nitric oxide molecules has been discovered, enabling researchers to study chemical reactions at low temperatures and investigate intermolecular interactions at large distances. The bi-molecule could have multiple technological applications in quantum optics and computing.
A team of researchers from University of Warsaw and China found quantum states that can only be distinguished using complex numbers, proving their importance in quantum mechanics. Complex numbers were initially considered purely mathematical but have been shown to play a fundamental role in the theory.
The research team applied filter functions and optimal quantum control theories to detect known signals from background noise in quantum bit (qubit) sensors. They obtained analytical insight into the optimal control protocol when background noise is white, similar to classical matched filtering scheme.
Researchers from QuTech at Delft University of Technology successfully demonstrated the control and coupling of four-qubit gates in a two-dimensional array of germanium-based semiconductor qubits. This achievement marks an important step toward dense, extended, two-dimensional semiconductor qubit grids.
Researchers at Chalmers University of Technology have developed a novel thermometer to measure temperatures during quantum calculations with extremely high accuracy. The breakthrough provides a benchmarking tool for quantum computing and opens up experiments in quantum thermodynamics.
Researchers have developed a method to create arbitrary dimensional quantum-like classical light directly from a laser, enabling the control of high-dimensional classically entangled states. This breakthrough opens up new possibilities for applications in quantum metrology, error correction, and optical communication.
Researchers have made a breakthrough in developing passive quantum error correction, which could enable the creation of fault-tolerant quantum computers. The technology has the potential to revolutionize various fields, including artificial intelligence, materials science, and biochemical engineering.
Researchers successfully transferred entangled qubit states through a communication cable, paving the way for future quantum networks. The team achieved entanglement amplification via the cable, using superconducting qubits, and demonstrated a system that can send entangled quantum states with minimal loss of information.
Researchers developed a new quantum theory that resolves the Gibbs paradox, a 150-year-old thermodynamic thought experiment. The study shows that even an 'ignorant' experimenter can extract work from a mixing process in a quantum system.