Articles tagged with Quantum Correlation
Researchers at Goethe University used X-ray radiation to determine the spatial structure of formic acid, finding that its atoms oscillate slightly back and forth. This 'quantum trembling' causes the molecule to lose its symmetry and become effectively three-dimensional at almost every moment.
Giant superatoms combine two quantum-mechanical constructs to suppress decoherence and create entanglement, opening opportunities for scalable and reliable quantum systems. This breakthrough enables quantum information to be protected, controlled, and distributed in new ways.
Researchers at Princeton University developed a diamond-based quantum sensor that uncovers rich new information about magnetic phenomena at the atomic scale. The technique provides key insight into materials like graphene and superconductors.
The study reveals significant lattice-driven CDW fluctuations in KV₃Sb₅ at temperatures far exceeding its CDW transition, providing new insights into underlying mechanisms. The research team observed in-plane band folding and lattice distortions at temperatures up to 150 K.
A team of researchers from University of Toronto Engineering has discovered hidden multi-dimensional modulation side channels in existing quantum protocols. These side channels arise in quantum sources and can introduce vulnerabilities to secure communication, potentially compromising the security of quantum key distribution.
Researchers have created quantum holograms using metasurfaces and nonlinear crystals, enabling precise control over entangled information. The technology holds promise for practical applications in quantum communication and anti-counterfeiting, with potential to increase information capacity and reduce system size.
Researchers at Osaka Metropolitan University developed new formulas to calculate key quantum informative quantities, including entanglement entropy and mutual information. These simplified expressions offer fresh perspectives into quantum behaviors in materials with different physical characteristics.
Physicists at the University of Cologne have successfully observed Crossed Andreev Reflection in TI nanowires, a crucial step toward engineering Majorana-based qubits. This breakthrough enables reliable control over superconducting correlations in topological insulator nanowires.
The qHPC-GREEN project aims to model quantum mechanical systems relevant to environmental and energy challenges using a hybrid approach combining classical and quantum computing hardware. This will help understand biocatalysts, enabling the development of new industrial catalysts for more sustainable production processes.
The team used Frontier to conduct a 1,000-fold larger simulation than any previous one, calculating over 2 million correlated electrons. This achievement sets a new benchmark for exascale supercomputing and provides a blueprint for enhancing algorithms to tackle larger scientific problems.
Researchers at TU Wien have developed computer simulations to investigate the temporal development of quantum entanglement. They found that the 'birth time' of an electron flying away from an atom is related to the state of the remaining electron, demonstrating a quantum-physical superposition.
Researchers have successfully achieved spin squeezing in a more accessible way, enabling precise measurements with quantum-enhanced metrology. This breakthrough may lead to new portable sensors for biomedical imaging and atomic clocks.
Researchers have developed a chip-based quantum system that can detect unauthorized access in quantum communication, using entangled four-photon states. This technology has the potential to strengthen data security and protect sensitive information from cyber threats.
Researchers have discovered unusual transport phenomena in ultra-clean SrVO3 samples, contradicting long-standing scientific consensus. The study's findings challenge theoretical models of electron correlation effects and offer insights into the behavior of transparent metals.
Researchers observe superfluorescence effect for the first time and control collective state of dipole ensemble using new regulatory dimension. They demonstrate cooperative exciton-polariton condensation with enhanced coupling strength, enabling potential applications for ultra-narrow tunable lasers and optoelectronic devices.
Physicists have developed a method to make quantum signals accessible again by analyzing simultaneous changes in states of multiple sensors. This approach enables precise measurement of magnetic field variations and distance between sensors, outperforming entanglement-based methods.
Researchers at Rice University have discovered a new material that exhibits both quantum correlations and geometric frustration, resulting in a unique flat band structure. This finding provides empirical evidence of the effect in a 3D material and has implications for understanding exotic features in materials science.
Researchers have developed a new approach to monitor ultrafast charge motion in strongly correlated solids, demonstrating phase transitions within femtoseconds. The technique offers sub-cycle temporal resolution and opens up new avenues for investigating ultrafast phenomena in correlated materials.
Researchers have developed Coherent Two-Photon LIDAR, eliminating range limitations imposed by coherence time. This technique uses phase-dependent interference to measure distances beyond the coherence time of the light source.
Researchers at UEA have proposed a new method to investigate quantum-mechanical processes in molecules using quantum light. The study shows that phonon signatures can be detected in photon correlations, providing a toolbox for studying quantum sound interactions.
Researchers have generated nearly deterministic OAM-based entangled states using QDs, enabling hybrid entanglement states in high-dimensional Hilbert spaces. This breakthrough offers a bridge between photonic technologies for quantum advancements.
Researchers from Hiroshima University found that measurements shape observable reality, suggesting a context-dependent understanding of quantum superpositions. This approach resolves the paradox of conflicting results in quantum experiments and provides evidence against reducing reality to material building blocks.
Researchers have found that certain materials can exhibit D-wave effects, entangled with other quantum states, allowing for efficient coupling at higher temperatures. This breakthrough bridges condensed matter physics subfields and could enable practical applications of quantum computing.
The researchers observed a record-breaking violation of quantum nonlocality, with a ratio of 0.274 between the quantum and classical limits. This discovery demonstrates the potential for advancing quantum computation in various physical systems.
Researchers have discovered anomalous quantum oscillations in twisted double bilayer graphene, which exhibit periodic behavior with the inverse of magnetic field. The oscillations are tunable by electric field and qualitatively reproduce calculations based on a phenomenological model.
A Brazilian-Chinese research team has demonstrated the coexistence of non-locality and contextuality in a quantum system. The study paves the way for new quantum information processing and communication protocols by reconciling two fundamental principles of quantum theory that were thought to be mutually exclusive.
A new method to regulate singlet fission (SF) in chromophores enables the design of SF-based materials with enhanced energy conversion. Pressure-based control strategy opens doors to novel, tunable SF materials.
Researchers developed an efficient algorithm that combines classical and quantum correlation functions to improve super-resolution microscopy. The algorithm, called 'super deconvolution imaging,' results in increased spatial frequency content, reduced mean squared errors, and faster imaging speeds.
Researchers developed a technique to predict how quantum systems behave when connected to their environment, turning a problem into a solution. The approach combines techniques from quantum many-body physics and non-Hermitian quantum physics, providing a crucial tool for real-world applications of quantum technology.
Princeton researchers have achieved a major breakthrough by microscopically studying molecular gases at a level never before achieved. The team cooled molecules to ultracold temperatures, observed individual molecules with high spatial resolution, and detected subtle quantum correlations, opening up new avenues for many-body physics re...
Scientists successfully created a light source that produced two entangled light beams using rubidium atoms. The entanglement was achieved by adding new detection steps to measure the quantum correlations in the amplitudes and phases of the fields generated, enabling applications in quantum computing, encryption, and metrology.
ICFO researchers successfully demonstrate transport of two-photon quantum states through a phase-separated Anderson localization optical fiber, showing maintained spatial anti-correlation. The phase-separated fiber enables efficient transmission of quantum information via Corning's optical fiber.
Researchers from Rice University and European institutions developed a method to switch on and off topological states in a strongly correlated metal using magnetic fields. The strong electron interactions enable the material to be controlled, which could lead to new applications in sensor technology and electronics.
Researchers from Rice University and partners identified three promising candidate materials using a new framework that cross-references information in a database of known materials with theoretical calculations. The method could help explore strongly correlated topological matter, a large and largely uninvestigated landscape.
Researchers at Rice University have discovered a unique arrangement of atoms in iron-germanium crystals that leads to a collective dance of electrons. The phenomenon, known as a charge density wave, occurs when the material is cooled to a critically low temperature and exhibits standing waves of fluid electrons.
Researchers use lasers to cool atoms to absolute zero, revealing new phenomena in an unexplored realm of quantum magnetism. The creation of SU(N) matter opens a gateway to understanding the behavior of materials and potentially leading to novel properties.
A team of researchers used resonant inelastic X-ray scattering to study the behavior of electron spins in iron selenide, a material that exhibits directionally-dependent electronic behavior. They found that high-energy spin excitations are dispersive and undamped, indicating a well-defined energy-versus-momentum relationship.
In a recent study, Dalla Torre and his team ran a collaborative mathematical game on different technologies to evaluate the systems' ability to demonstrate quantum mechanical properties. The Quantinuum System Model H1-1 outperformed classical results by returning correct answers 97% of the time.
Researchers develop theory on exploiting space reflection and time reversal symmetries to control transport and correlations in quantum materials. The discovery may lead to the design of future quantum devices relying on strong correlations and exceptional points in oligomer chains.
The study introduces a versatile method to tune the interaction strength in 2D heterostructures by applying electrical fields. This allows for the exploration of wide parameter ranges and opens up new perspectives for quantum simulation.
Researchers at the University of Witwatersrand have developed a new approach to probing high-dimensional quantum states, reducing measurement time from decades to minutes. The method enables faster quantum computing and communication by determining key parameters such as dimensionality and purity of the quantum state.
Researchers have identified a new technique to test the quality of quantum correlations in large systems, reducing resource intensity and increasing noise resilience. By combining two processes, they enable efficient certification of correlations in complex systems.
Researchers have made a groundbreaking discovery about the role of heat in quantum impurity studies, extending our understanding of thermodynamics. The study reveals that two distinct experimental protocols probe the same information, providing new insights into quantum correlations.
Low-energy and high energy states in a layered superconducting material are found to be correlated. The study uses multidimensional spectroscopy to probe quantum coherence, producing coherent excitations lasting up to 500 femtoseconds.
Physicists from the University of Exeter have theoretically found a quantum system where time correlations survive for an infinitely long time, breaking the no-go theorem for genuine time crystals. The discovery could lead to the development of novel atomic clocks and shed light on condensed matter physics.
Scientists at UNIGE have entangled three pairs of photons to create a highly-correlated triangle, exhibiting strong quantum correlations. This discovery could lead to the development of new ultra-secure encryption keys and revive fundamental quantum physics research.
Researchers at CBPF and UFABC used quantum correlations to reverse thermodynamic arrow of time, allowing heat to flow from cold to hot without external energy. The experiment demonstrates a generalized form of the second law of thermodynamics, highlighting the role of quantum correlations in thermal transfer.
Researchers at NIST developed a quantum method to generate random numbers guaranteed by quantum mechanics. The new technique surpasses previous methods and enhances security in cryptographic systems. By analyzing correlations between distant photons, the researchers certified and quantified randomness available in the data.
A new method of securely communicating between multiple quantum devices has been developed, enabling a large-scale, un-hackable quantum network. The approach uses quantum laws to ensure security and can work for any device, regardless of manufacturer, bridging the gap between theory and practical implementation.
Researchers from the University of Innsbruck have established a new method to efficiently characterize large quantum states, enabling the development of large-scale quantum simulators. The new method requires significantly fewer measurements than current gold standard, opening up possibilities for complex quantum simulations.
Researchers at TU Wien and Heidelberg University have demonstrated how to test quantum field theories in a quantum simulator, using thousands of ultra cold atoms. This allows for unprecedented study of fundamental quantum processes and their correlations.
Researchers found nonlocal correlations in natural systems, which are incompatible with principles of information and energy transfer. The study proposes a new method to detect these correlations, shedding light on the fascinating problem of nonlocality in quantum many-body systems.
Researchers have created a quantum simulator that can simulate the dynamics of many electrons interacting with each other within one billionths of a second. This ultrafast quantum simulator will serve as a basic tool to investigate the origin of physical properties of matter, including magnetism and superconductivity.
Researchers successfully simulated the Unruh effect using an NMR quantum simulator, replicating theoretical predictions and creating new quantum correlations. The study paves the way for exploring accelerated systems in black hole physics, cosmology, and particle physics.
Scientists Kaspar Sakmann and Mark Kasevich developed a new method to calculate effects in ultra-cold atom clouds, which can only be explained by quantum correlations between many atoms. This breakthrough enables accurate descriptions of complex many-body systems, such as Bose-Einstein condensates and collisions between these states.
Researchers from the University of Vienna and Université Libre de Bruxelles have shown that in quantum mechanics, a single event can be both a cause and an effect of another one. This challenges our understanding of causality and has far-reaching implications for foundations of quantum mechanics, quantum gravity, and quantum computing.