Articles tagged with Quantum States
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Physicists at the University of Cologne have discovered that magnetic elementary excitations in BaCo2V2O8 crystals are bound by both attractive and repulsive interactions. The study found that repulsively bound states, which were unexpected due to their lower stability, can exist in these materials.
A team of scientists led by Qimiao Si predicts the existence of flat electronic bands at the Fermi level, which could enhance electron interactions and create new quantum phases. These bands have the potential to enable new applications in quantum bits, qubits, and spintronics.
Researchers at Columbia University have successfully created a unique quantum state of matter called a Bose-Einstein Condensate (BEC) out of molecules. The breakthrough, achieved by cooling sodium-cesium molecules to just five nanoKelvin, has the potential to advance powerful quantum simulations and unlock new areas of research.
Researchers demonstrate a way to describe spin-boson systems and efficiently configure quantum devices in a desired state. Non-Gaussian states are used to retain powerful mathematical machinery while describing diverse quantum states.
Researchers at Harvard University have successfully demonstrated the first metro-area quantum computer network in Boston, using existing telecommunication fiber to send hacker-proof information via photons. The breakthrough overcomes signal loss issues, enabling the creation of a secure quantum internet.
Researchers developed a probabilistic approach to generate optimal sequences for execution on quantum computers, reducing search time by several orders of magnitude. The new method enables efficient searches within classical computational resources, contributing to the realization of the quantum Internet and improved performance.
Researchers at the University of Melbourne and Manchester have invented a breakthrough technique for manufacturing highly purified silicon, making it ideal for creating powerful quantum computers. The new technique uses qubits of phosphorous atoms implanted into crystals of pure stable silicon, extending the duration of notoriously fra...
Researchers have proposed a theoretical idea and made experiments to overcome noise limitations in quantum teleportation, enabling high-quality transfer of qubit states. Hybrid entanglement between different physical degrees of freedom allows for beneficial noise effects.
Physicists have achieved a breakthrough by exciting thorium atomic nuclei with lasers for the first time, enabling precise tracking of their return to original energy states. This discovery has far-reaching implications for precision measurement techniques, including nuclear clocks and fundamental questions in physics.
Researchers at The University of Manchester have successfully achieved robust superconductivity in high magnetic fields using a newly created one-dimensional system. This breakthrough holds profound potential for advancements in quantum technologies, particularly in the quantum Hall regime.
A team of researchers created a single negatively charged lead-vacancy center in diamond, which emits photons with specific frequencies not influenced by the crystal's vibrational energy. This characteristic makes the PbV center a promising building block for large-scale quantum networks.
Researchers at Rice University and the University of Illinois Urbana-Champaign have found that chemical reactions can scramble quantum information, similar to black holes. This discovery could lead to new methods for controlling molecular behavior and improving the reliability of quantum computers.
Researchers found a way to use heat to toggle a crystal between two electronic phases, storing qubits in topologically protected states that could reduce decoherence-related errors. The discovery may lead to the creation of flash-like memory capable of storing quantum bits of information.
A team of scientists has discovered dual topological phases in an intrinsic monolayer crystal, revealing new rule-bending properties in a quantum material. The discovery introduces a novel effect, known as the dual topological insulator or quantum spin Hall insulator, which exhibits zero electrical conductivity within its interior.
A new technique has been developed to cool quantum simulators, allowing for more stable experiments and better insights into quantum effects. By splitting a Bose-Einstein condensate in a specific way, researchers can reduce temperature fluctuations and enhance the performance of quantum simulators.
An international team has gained insights into special states of matter through experiments at BER II, finding a spin-nematic phase formed under extreme magnetic fields. The results suggest a condensate of bosonic Cooper pairs, analogous to superconductivity.
Researchers discovered charge fractionalisation in an iron-based metallic ferromagnet using laser ARPES spectroscopy, revealing collective excitations and quasiparticles. The study challenges fundamental quantum mechanics by showing electrons can behave as independent entities with fractionally charged pockets.
Researchers at Paderborn University have developed a new method for determining the characteristics of optical quantum states using photon detectors, enabling precise knowledge essential for quantum computing and information processing.
Physicists at the University of Southampton successfully detect weak gravitational pull on microscopic particles using a new technique. The experiment, published in Science Advances, could pave the way to finding the elusive quantum gravity theory.
Physicists at Princeton University have observed long-range quantum coherence effects due to Aharonov-Bohm interference in a bismuth bromide topological insulator-based device. This finding could lead to the development of spin-based electronics with higher energy efficiency and new platforms for quantum information science.
Researchers have discovered a new state of matter characterized by chiral currents, generated by cooperative electron movement. This phenomenon has implications for the development of new electronic devices and technologies, including optoelectronics and quantum technologies.
Physicists at the University of Colorado Boulder have discovered a way to create scenarios where information can remain stable in quantum computer chips, potentially leading to advances in quantum computing. The team's findings could also influence other fields, such as materials science and engineering.
Researchers at Rice University have developed a new experimental technique that preserves quantum coherence in ultracold molecules for a significantly longer time. By using a specific wavelength of light, the 'magic trap' delays the onset of decoherence, allowing scientists to study fundamental questions about interacting quantum matter.
Scientists from the Stiller Research Group have successfully cooled the temperature of a sound wave in an optical fiber to 74K (-194C), reducing phonon number by 75%. This achievement brings researchers closer to bridging the gap between classical and quantum mechanics.
Researchers at Paul Scherrer Institute created solid-state qubits from rare-earth ions in a crystal, showing that long coherences can exist in cluttered environments. The approach uses strongly interacting pairs of ions to form qubits, which are shielded from the environment and protected from decoherence.
Researchers have developed a method to quantify the spectral density of molecules in solvent, allowing for the design of molecules with specific quantum coherence properties. This breakthrough enables the mapping of decoherence pathways in molecules, connecting chemical structure to quantum decoherence.
ICFO researchers observed a light-induced increase and control of conductivity in graphite by manipulating its many-body state, showing signatures of superconductivity. The study uses attosecond soft-X-ray pulses to probe electronic dynamics, providing new insights into material properties and quantum states.
The research team created a mathematical model showing that no clock can have both infinite energy and perfect time resolution, setting limits to quantum computer capabilities. This realization impacts the speed and reliability of quantum computers, as current accuracy is limited by other factors.
Theoretical demonstration shows that an optical cavity can change the magnetic order of α-RuCl3 from a zigzag antiferromagnet to a ferromagnet solely by placing it into the cavity. The team's work circumvents practical problems associated with continuous laser driving.
Researchers found that tiny timing errors can significantly impact quantum algorithms, limiting the technology's potential. Despite promising applications in fields like pharmaceutical discovery and materials science, quantum computers' fragility hinders their scalability.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a system that uses atomic vacancies in silicon carbide to measure the stability and quality of acoustic resonators, which could improve communications and offer new control for quantum computing. The technique also allows for acoustically-c...
Researchers at IBS Center for Quantum Nanoscience created a novel electron-spin qubit platform assembled atom-by-atom on a surface, demonstrating ability to control multiple qubits. This breakthrough enables application of single-, two-, and three-qubit gates.
Researchers at Indian Institute of Science create SQ-CARS, a scalable platform for advanced quantum experiments with superconducting transmon qubits, reducing cost and size.
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.
A team of Cornell researchers has found a promising quantum state called a 'quantum spin-glass' while studying random algorithms for error correction in quantum computing. This discovery could lead to new strategies for protecting qubits from environmental noise and errors.
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.
A Princeton University-led team has captured the precise microscopic behavior of interacting electrons that give rise to insulating quantum phase in magic-angle twisted bilayer graphene. The study uses scanning tunneling microscopy and achieves pristine samples, allowing for high-resolution images of materials.
A team of researchers has discovered a way to harness random telegraph noises in semiconductors, generating high-amplitude signals and manifesting inherent quantum states. By introducing vanadium into tungsten diselenide, they created a device that can switch between two stable states using voltage polarity.
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.
A team of researchers at the University of Washington has discovered a way to imbue bulk graphite with physical properties similar to those of graphene, a single-layer sheet. This breakthrough could unlock new approaches for studying unusual and exotic states of matter and bring them into everyday life.
Researchers have successfully isolated individual color centers in hexagonal boron nitride (hBN) and achieved coherent control of an ultrabright single spin with high probability. This breakthrough enables optically controlled spins, opening up new possibilities for quantum information processing.
Researchers have discovered a new phase of matter called the chiral bose-liquid state, which has surprising characteristics, such as robust spin and long-range entanglement. This discovery opens up new possibilities for understanding the physical world and potentially leading to breakthroughs in quantum computing.
Scientists at the University of Tokyo develop a technique to create nano-sized quantum sensors on measurement targets, enabling high-resolution magnetic field imaging with applications in superconductors and electronic devices. The breakthrough uses boron vacancies or lattice defects in hexagonal boron nitride film, allowing for easy d...
Researchers have developed a new scheme for controlling qubits in multilevel systems, enabling high-fidelity gate operations and overcoming interference issues. The approach uses a shuttle state to achieve equivalent coupling between any two energy levels, allowing for efficient control of quantum states.
Researchers have experimentally demonstrated a new quantum information storage protocol to create complex entangled states like GHZ quantum states. They used nuclear spins surrounding a central ytterbium ion qubit to store and retrieve quantum information with enhanced resilience.
Researchers at UChicago found a surprising connection between photosynthesis and exciton condensates, a state that allows frictionless energy flow. The discovery could lead to more efficient materials and technologies, such as superconductors.
Researchers reconstructed the full state of a quantum liquid using ultracold atoms, offering insights into quantum systems' fluctuations and behavior. This breakthrough has promise for quantum computing, sensing technology, and better characterization of quantum systems.
The researchers developed a method to create ultracompact photonic crystal cavities that can generate entangled photons. The discovery is crucial for the development of quantum computing and sensing applications. By controlling the cavity's properties, they can efficiently convert pump power into coherent light.
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.
The team successfully entangled two qudits with unprecedented performance, enabling faster and more robust quantum computing. This breakthrough could lead to significant advancements in fields like chemistry and physics.
A team of researchers at Vienna University of Technology and Toho University in Japan investigated the electrical resistance of κ-(BEDT-TTF)2Cu2(CN)3 as a function of temperature and pressure. They found that the material exhibits properties similar to those of helium-3, contradicting the theory of a quantum spin liquid.
Researchers found that two outermost electrons from each nickel ion behaved differently, cancelling each other out in a phenomenon called a spin singlet. This led to the discovery of two families of propagating waves at dramatically different energies, contradicting expectations of local excitations.
Researchers at DTU found that conventional materials like silicon cannot prevent backscattering in photonic systems, despite attempts to create topological waveguides. The study suggests that new materials breaking time-reversal symmetry are needed to achieve protection against backscattering.
Researchers developed an all-optical quantum state sharing protocol that uses continuous variable systems to share secret information between multiple parties. The new method successfully implemented in a low-noise amplifier and demonstrated higher average fidelity than classical limits.
Researchers at TU Wien develop a quantum version of the third law of thermodynamics, finding that absolute zero is theoretically attainable but requires infinite energy, time, or complexity. This breakthrough reconciles quantum physics with thermodynamics, paving the way for the development of practical quantum computers.
Researchers predict that layered electronic 2D semiconductors can host a quantum phase of matter called the supersolid. A solid becomes 'super' when its quantum properties match those of superconductors, simultaneously having two orders: solid and super. The study reports the complete phase diagram of this system at low temperatures.
Researchers developed a new tool to disentangle electronic states in layered quantum materials, revealing surprising results that defy theoretical predictions. By analyzing vibrations and energy measurements, scientists can 'see' how electrons move through the layers.
Researchers develop new way to generate squeezing that overcomes fundamental quantum imprecision, enabling more precise atomic clocks and improved quantum sensors. The new approach leverages bosonic pair creation and enables entangled states with minimal fuss, reducing experimental challenges.
Researchers at Tokyo Institute of Technology have successfully created Sn-V centers with identical photon frequency and linewidth, marking a new phase in their use as quantum nodes. The breakthrough enables the formation of stable Sn-V centers suitable for creating remote entangled quantum states.
Researchers at Purdue University have developed heterostructures that support the prediction of counterpropagating charged edge modes at the v=2/3 fractional quantum Hall state. The team's experiment measured an electrical conductance equal to half the fundamental value of e^2/h, consistent with theoretical predictions.