Articles tagged with Quantum Entanglement
Researchers from Leibniz University Hannover and PTB have successfully demonstrated the on-demand emission of electron pairs from a semiconductor quantum dot. The resulting electron pairs were found to be spatially separated with over 90% efficiency, a crucial step towards future applications such as quantum computing and cryptography.
Researchers sent twisted light beams across Vienna, encoding images and demonstrating increased data-carrying capacity. The technology could significantly increase data-rates in classical communication and make secret keys tougher to crack in quantum communication.
A team of researchers from Université de Genève and Hungarian Academy of Sciences disproves Asher Peres's conjecture that the weakest form of quantum entanglement can never result in the strongest manifestation of nonlocality. They find a counter-example using numerical algorithms, showing bound entanglement can violate Bell's inequality.
Researchers develop new approach to generate mixed-up photon pairs on a chip, exploiting micro-ring resonator technology. The device can directly generate orthogonal polarized photons at very low power, suitable for quantum protocols.
Researchers at EPFL propose a feasible experiment to show entanglement in the macroscopic realm, leveraging optomechanics and nanostructures. The experiment involves converting light into mechanical vibrations, which exhibit entangled behavior.
Researchers at Université de Genève have successfully teleported the quantum state of a photon to a crystal over 25 kilometers of optical fibre, surpassing their previous record of 6 kilometers. This experiment demonstrates that quantum state can exist independently of material composition.
Researchers at NIST and the University of Waterloo directly entangled three photons, a breakthrough in quantum information systems. The use of superfast single-photon detectors enabled stable and high-quality results, paving the way for applications in quantum computing and quantum communications.
A team led by Robert Boyd at the University of Rochester replicated a 2012 experiment that appeared to violate a fundamental law of quantum mechanics. By analyzing the data more subtly, they found that biased sampling was the cause of the anomaly, reaffirming the standard interpretation of quantum laws.
Physicists at NIST demonstrated a pas de deux of atomic ions that combines precise control with entangled states. The ion duet enables scalable simulation and computing, with potential applications in logic operations and precision measurement tools.
Physicists at UC Berkeley have demonstrated a way to follow the 'life history' of a quantum system, allowing for continuous error correction. This technology could enable steering quantum evolution and optimizing chemical reactions.
Researchers have discovered a way to control quantum dot triplets using electrical impulses, which could lead to faster quantum computers. The study shows that changing the coupling of three coherently coupled quantum dots can induce a phase transition between entangled and disentangled electron states.
Physicists Sergei Filippov and Mario Ziman have found a way to preserve quantum entanglement in particles passing through an amplifier and when transmitting signals over long distances. This breakthrough allows for more efficient quantum computing and secure communication channels.
Researchers at the University of Innsbruck have developed a platform to investigate quasiparticles and entanglement propagation in quantum many-body systems. They can precisely initialize, control, and measure the states and properties of quasiparticle excitations.
Researchers at Saarland University developed a new calibration technique called Ad-HOC that reduces the calibration error rate to below 0.1% and speeds up the process from six hours to five minutes.
Researchers at ICFO have designed classes of multipartite Bell inequalities to detect nonlocality in many-body quantum states. These inequalities can be verified experimentally by measuring total spin components, enabling the study of complex many-body systems.
Physicists in Innsbruck developed a new quantum error-correcting method and tested it experimentally. The topological code arranges qubits on a two-dimensional lattice to detect and correct general errors. This approach could lead to a robust quantum computer performing any number of operations without being impeded by errors.
Researchers at ICFO have demonstrated a nonlinear interferometer that can measure tiny magnetization with improved sensitivity. This breakthrough confirms theoretical predictions and paves the way for more accurate quantum measurements.
Physicists at the University of Toronto have made a breakthrough in ultra-precise measurement technologies using quantum mechanics. By employing entangled photons and multiple detectors, they were able to achieve resolutions unattainable by classical physics.
Researchers at the University of Pittsburgh have detected a fundamental particle of light-matter interaction in metals, known as an exciton. The discovery provides a microscopic quantum mechanical description of how light excites electrons in metals.
Researchers from NIST and University of Maryland's Joint Quantum Institute found that speeding up part of a light beam past the speed of light results in lost quantum data. The team explored what this means for quantum information transfer in quantum computers, suggesting that quantum noise and distortion set an information speed limit.
Researchers at Joint Quantum Institute investigate entangled beams in fast-light materials, where anomalous dispersion causes faster-than-light-like behavior. The findings reveal potential applications in ultrafast data processing and secure communication.
Researchers at Caltech found a way to sidestep quantum 'noise' that limits precision of ultrasensitive position measurements, enabling detection and avoidance of quantum fluctuations. The study provides a solution for rerouting some of the noise away from the measurement, allowing for increased sensitivity without compromising accuracy.
Researchers at University College London have identified a measurable quantity that labels distinct phases of quantum systems with boundary phase transitions. This discovery opens up new possibilities for studying phase transitions in quantum physics and may help determine new phases of matter.
Researchers from Universitat Autonoma de Barcelona have achieved a groundbreaking quantum entanglement with a minimum of 103 dimensions using only two particles. This breakthrough enables the creation of highly complex states that can facilitate experimental development of quantum computers and enhance cryptography security.
Physicists demonstrate distribution of three entangled photons at three different locations, proving quantum nonlocality and opening possibilities for multi-party quantum communication. The experiment overcomes the locality loophole, allowing for faster-than-light information transfer.
Researchers at the University of Toronto have successfully generated entangled photons using a combination of light-emitting diodes and superconductors. This breakthrough could lead to significant advancements in quantum computing, communication, and other fields.
Researchers have demonstrated a form of quantum cryptography that protects people doing business with others they may not trust. The protocol, known as 1-2 random oblivious transfer (ROT), allows two parties to securely exchange information without revealing their picks, making it ideal for secure identification and online transactions.
Researchers at USC have validated the quantum nature of D-Wave processors using elaborate tests on its functional qubits. The results consistently agree with quantum models but contradict classical models, indicating the presence of quantum effects.
Researchers at MIT have proposed an experiment using distant quasars to determine the settings of particle detectors, which could close the 'free will' loophole and provide evidence for quantum mechanics. This setup would utilize the oldest light in the universe to eliminate potential biases.
Professor Geoff Pryde from Griffith University's Centre for Quantum Dynamics has been recognized for his pioneering contributions to quantum information science, including the first entangling optical quantum computer logic gate and fundamental experimental studies of quantum entanglement.
Computer scientist Yi-Kai Liu has devised a method to create secure, one-shot memory units using quantum physics. The conjugate coding approach stores data in qubits, exploiting the lack of entanglement in certain physical systems to ensure security.
A new study by Julian Sonner suggests that creating two entangled quarks simultaneously gives rise to a wormhole connecting the pair. This finding bolsters the idea that quantum entanglement may play a key role in understanding gravity, potentially leading to a theory of quantum gravity.
Researchers at the University of Washington and Stony Brook University have discovered a potential link between quantum entanglement and wormholes. The study suggests that entangled particles may be connected by hypothetical features of space-time that could facilitate faster-than-light travel.
Researchers at NIST and the University of Copenhagen created an experiment where ions were linked to the outside world, resulting in a stable entangled state. This method could lead to new architectures for quantum computing that can tolerate noise and errors.
Scientists at the University of Copenhagen's Niels Bohr Institute have developed a method that harnesses decay to create entanglement between electrons in atomic systems. By controlling the interactions with their surroundings, researchers can precisely control the energy states of the electrons, leading to perfect entanglement.
Researchers at Vienna University of Technology develop a single-atom light switch that can redirect light between two fibre optic cables. The system utilizes a Rubidium atom to act as a switch, allowing for the manipulation of light and enabling quantum phenomena for information and communication technology.
French researchers' oil-bath experiments provide evidence of wave-particle duality on a macroscopic scale. However, the phenomenon fails to explain entanglement, a key aspect of quantum theory.
Researchers create novel concept using metamaterial to study quantum entanglement and complex relationships between photons. The system enables precise measurements without losing photons, providing a deeper understanding of the transition zone between classical and quantum physics.
Researchers at Princeton University discovered nearly straight paths in quantum control landscapes, allowing for more efficient manipulation of atoms and molecules. This breakthrough could lead to improved measurements and design of quantum systems, including quantum computers.
Physicists at NIST have successfully entangled a microscopic mechanical drum with electrical signals, confirming its potential as a quantum memory in future quantum computers. The experiment also marks the first-ever entanglement of a macroscopic oscillator, opening up new practical uses for the drum.
A UC Santa Barbara research team has demonstrated a nanomechanical transducer that provides strong and coherent coupling between microwave signals and optical photons. This breakthrough enables the translation of electrical quantum states to optical quantum states, paving the way for secure communication and quantum teleportation.
The University of Calgary has launched the Institute for Quantum Science and Technology (IQST), a unit dedicated to research, training, and outreach in quantum science. The IQST will focus on key research themes such as quantum optics, quantum information, and nanotechnology, with a goal of advancing transformative technology.
Researchers at UCL and University of Gdansk develop a new method to determine the amount of entanglement in one-dimensional quantum systems based solely on the area of the boundary between regions. This finding resolves a long-standing problem, showing that certain systems can be simulated easily using classical computers.
The proposed system combines ultracold trapped ions and fermionic atoms to emulate solid state physics, including the Peierls transition and phonon-mediated interactions. This hybrid system may simulate complex quantum systems beyond current computing power.
Researchers in Tokyo and Mainz have successfully teleported photonic qubits with extreme reliability using a hybrid technique. The accuracy of the transfer was 79-82 percent, surpassing previous experiments.
Physicists at ETH Zurich have successfully teleported information across a distance of six millimeters using a solid state system. This achievement demonstrates the potential for quantum communication and may lead to faster and more efficient quantum computing in the future.
Researchers at JILA have discovered that an atomic clock can mimic the behavior of complex quantum systems, including high-temperature superconductors. The study's findings suggest that atoms in the clock interact like those in magnetic materials, leading to correlations and entanglement.
Physicists at the University of Innsbruck have developed a new method to verify entanglement between several objects, using device-independent witnesses. This approach allows for high-confidence statements about entanglement with minimal assumptions.
The University of Toronto has awarded Michel Devoret and Robert Schoelkopf the John Stewart Bell Prize for their groundbreaking contributions to quantum mechanics. Their pioneering work in 'circuit quantum electrodynamics' has opened up new avenues for studying fundamental quantum physics.
Researchers from UNIGE have successfully entangled two optic fibers populated by 500 photons, surviving on a macroscopic level. The phenomenon demonstrates that larger elements can retain their quantum properties, despite interactions with the surrounding environment.
Dr. Immanuel Bloch will receive the 2013 Körber European Science Prize for his groundbreaking research on lattice-trapped ultracold atoms, enabling precise monitoring of solid structures and potential applications in superconductors and quantum information processing. The prize includes €750,000 to support his research activities.
Physicist Dr Nicolas Brunner and mathematician Professor Noah Linden discovered a connection between game theory and quantum physics, showing that quantum players can outperform classical players in certain games. This breakthrough opens new avenues for research and potential applications for quantum technologies.
Physicists at Innsbruck University develop new method to measure single photons, achieving a detection probability of 12%. The technique uses quantum logic spectroscopy and entangled ions to gain practical knowledge about single particles.
Researchers have achieved entanglement between light and an optical atomic coherence composed of interacting atoms in two different states, paving the way for functional multi-node quantum networks. The state-insensitive trap allowed the researchers to generate photons at a rate of 5,000 per second, enabling deterministic entanglement.
Researchers at Vienna University of Technology have demonstrated experimentally that ultra-thin glass fibers can store quantum information long enough to be used for entangling atoms hundreds of kilometers apart. This is a fundamental building block for a global fiber-based quantum communication network.
Researchers develop method to classify quantum entanglement states into geometric objects called polytopes, allowing for efficient prediction and characterization of entangled states. This breakthrough enables the development of novel quantum technologies with practical applications.
In large quantum systems, entanglement becomes ubiquitous above a threshold of about 200 particles, enabling super high-speed communications and quantum computing. The study provides parameters to harness this property.
Researchers at JQI establish a new record for heralding efficiency, detecting entangled photons with 84% accuracy. This achievement paves the way for tighter loopholes over quantum reality and potentially random number generation.
Researchers from the University of Vienna have closed a loophole for photons, providing definitive experimental proof that quantum particles can exhibit non-classical behavior. The study uses entangled photon pairs and advanced detection technology to rule out possible explanations for previous results.
Physicists at Georgia Tech studied how quantum information propagates through Bose-Einstein condensates, establishing the top speed for quantum computer communication. The research could address the decoherence problem and enable ultra-fast computing.