Articles tagged with Quantum States
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.
A new mathematical theory developed by scientists at Rice University and Oxford University can predict the nature of motions in complex quantum systems. The theory applies to any sufficiently complex quantum system and may give insights into building better quantum computers, designing solar cells, or improving battery performance.
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.
Researchers from University of the Witwatersrand developed a new approach to studying complex light in complex systems. They found distortion-free forms of structured light that emerge undistorted from noisy channels, unlike other forms of structured light which become unrecognizable. This breakthrough has the potential to pave the wa...
Researchers from Nanjing University have proposed the first scheme to practically generate N-photon states deterministically using a lithium-niobate-on-insulator platform. The scheme involves deterministic parametric down-conversion and demonstrates feasibility for generating multiphoton qubit states.
Scientists develop eigenmodes of structured light that remain undistorted even in turbulent channels, enabling robust transmission through noisy media. This breakthrough paves the way for future work in quantum light communication and imaging through complex systems.
Researchers have devised a new mechanism to generate high-energy 'quantum light', which could reveal new properties of matter at the atomic scale. The theory predicts a way to control the quantum nature of light using correlated emitters with a strong laser.
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...
The team isolated pairs of atoms within a 3D optical lattice to measure the strength of their mutual interaction. They confirmed a longstanding prediction that the p-wave force between particles reached its maximum theoretical limit.
KAUST researchers have designed and built novel organic scintillator materials for detecting X-rays at low doses, overcoming stability issues with existing ceramic or perovskite materials. The new approach uses heavy atoms to improve X-ray absorption capability and exciton utilization efficiency.
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.
A new method bridges the quantum and classical worlds, enabling interaction-free detection of microwave pulses with a superconducting circuit. This breakthrough demonstrates genuine quantum advantage using a simpler setup, with potential applications in quantum computing, optical imaging, and cryptographic key distribution.
Researchers at the University of Ottawa have developed a new technique to differentiate the mirror images of a chiral molecule, a problem that was believed to be unsolvable for nearly 20 years. The team used linear polarized helical light beams to enhance sensitivity and observed differential absorption in achiral molecules.
Researchers from Okinawa Institute of Science and Technology (OIST) have developed a machine learning-based method to discover non-intuitive pulse sequences that can cool mechanical objects to ultracold temperatures faster than traditional methods. This breakthrough showcases the utility of artificial intelligence in quantum technologies.
Researchers at the University of Science and Technology of China have developed a method to store high-dimensional orbital angular momentum quantum states for an extended period. The team used a guiding magnetic field combined with clock state preparation to achieve a storage time of up to 400μs, surpassing previous records.
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.
Physicists at the University of Basel have experimentally demonstrated a negative correlation between the spins of paired electrons from a superconductor. The researchers used spin filters made of nanomagnets and quantum dots to achieve this, as reported in the scientific journal Nature.
Researchers at the University of Queensland have confirmed black hole quantum properties, including superposition and wildly different masses simultaneously. The study reinforces early theories by Jacob Bekenstein, postulating that black holes can only have specific mass values within certain bands or ratios.
Physicists have observed novel quantum effects in a topological insulator at room temperature, opening up new possibilities for efficient quantum technologies. This breakthrough uses bismuth-based topological materials to bypass the need for ultra-low temperatures.
Researchers at the University of Tokyo have identified possible solutions to limitations of qubits for quantum computing. They successfully controlled temperature and movement of trapped electrons in a vacuum using hybrid quantum systems, paving the way for potential applications in quantum technology.
Australian researchers have engineered a quantum box for polaritons in a two-dimensional material, achieving large polariton densities and a partially 'coherent' quantum state. The novel technique allows researchers to access striking collective quantum phenomena and enable ultra-energy-efficient technologies.
Researchers from Huazhong University of Science and Technology developed a scalable metalens array for optical addressing, enabling compact focusing of individual addressing beams onto quantum particles. The design features a periodical metalens molecule with a 'Z' shape, allowing for arbitrary focused spot arrays and low crosstalk.
A multi-institutional team has developed an efficient method for measuring high-dimensional qudits, which are more resistant to noise and can carry more information than qubits. The technique uses phase modulators and pulse shapers to characterize qudit entanglement with unprecedented precision.
Researchers at the University of Colorado Boulder have discovered a novel phenomenon in a type of quantum material that can change its electrical properties under specific conditions. The material, known as Mn3Si2Te6, exhibits colossal magnetoresistance when exposed to certain magnetic fields, allowing it to behave like a metal wire.
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 at NICT have developed a new systematic method to identify the optimal quantum operation sequence, enabling efficient task execution and contributing to improving quantum computer performance and reducing environmental impact. The method uses GRAPE algorithm to analyze all possible sequences of elementary quantum operations.
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.
Researchers at the Max Planck Institute have successfully generated up to 14 entangled photons using a single atom, enabling efficient creation of quantum computer building blocks. This breakthrough could facilitate scalable measurement-based quantum computing and enable secure data transmission over greater distances.
Researchers from the University of Pennsylvania establish a relationship between topology and entanglement, tying two major principles in physics together. The connection reveals that the genus of the Fermi surface is closely related to a measure of quantum entanglement called mutual information.
Physicists have created a way to simulate quantum entanglement between interacting particles using neural networks and fictitious 'ghost' electrons. This approach enables accurate predictions of molecule behavior, which could lead to breakthroughs in pharmaceutical development and material design.
Researchers have discovered nickel oxide superconductors with the presence of charge density waves (CDWs), which accompany superconductivity. This discovery reveals that nickelates are capable of forming correlated states, hosting a variety of quantum phases, including superconductivity.
Researchers successfully manipulated energy levels in tungsten diselenide to induce luminescence, a breakthrough for controlling matter through light fields. The discovery could enhance optical properties of organic semiconductors, leading to innovative LED and solar cell applications.
The researchers improved the coherence time of a previously developed quantum membrane dramatically, expanding its usability for various purposes. With a coherence time of one hundred milliseconds, the membrane can store sensitive quantum information for further processing in a quantum computer or network.
Rice University engineers have developed a novel approach to manipulating the magnetic and electronic properties of 2D materials by stressing them with contoured substrates. The technique, inspired by recent discoveries in twisted 2D materials, allows for unprecedented control over quantum effects.
Researchers at ETH Zurich successfully demonstrated a protocol for gentle, controlled measurement of mechanical quantum states in hybrid qubit-resonator devices. This breakthrough enables applications such as quantum error correction and more, paving the way for advanced technological innovations.
Researchers have created a giant magnetochiral anisotropy effect in topological insulator nanowires, allowing for highly controllable current rectification. This discovery opens the pathway for technological applications and demonstrates a significant step towards achieving topological qubits.
Researchers at TU Wien and Hiroshima University have corrected a long-standing flaw in the double-slit experiment, proving that individual particles can move along multiple paths at once. By detecting a single neutron, they were able to determine its presence on each path with high accuracy.
Researchers use computational detective work to verify the existence of a 3D quantum spin liquid in cerium zirconium pyrochlore, overcoming decades-long challenge. The material exhibits fractionalized spin excitations, where electrons do not arrange their spins in relation to neighbors.
A Harvard-led team created a new method for processing quantum information that allows for the dynamic change of atoms' layout during computation, expanding capabilities and enabling self-correction of errors. This approach uses entanglement to connect atoms remotely and can process exponentially large amounts of information.
Researchers at Swansea University developed a new method to stop molecular rotation using ultra-low energy, which governs surface chemistry processes. They achieved this by manipulating the quantum state of a molecule just before collision with a surface.
Researchers at University of Innsbruck and ETH Zurich propose a new concept for a high-precision quantum sensor using microcavities and levitated nanoparticles. By exploiting fast unstable dynamics, they demonstrate mechanical squeezing reducing motional fluctuations below zero-point motion.
A POSTECH research team has developed a platform that can control and measure the properties of solid materials with light. This breakthrough enables the manipulation of quantum states in solids, which can be effectively used in quantum systems.
A team of US and Chinese researchers has directly measured how individual electronic quantum states in a kagome magnet respond to external magnetic fields, shifting energy in an unusual manner. They found that Dirac fermions exhibit momentum-dependent shifts under the applied field.
Researchers at Rice University have developed a new type of electronics using undulating graphene, which creates mini channels that produce detectable magnetic fields. This technology has the potential to facilitate nanoscale optical devices and valleytronics applications, such as converging lenses and collimators.
Physicists at ETH Zurich demonstrate that vacuum fluctuations can cause a breakdown of topological protection in the integer quantum Hall effect. Exposing a quantum Hall system to strongly enhanced quantum vacuum fluctuations of a tight cavity provides a novel route to modify quantum states.