Articles tagged with Quantum States
Physicist Guido Pagano has won a prestigious CAREER award from the National Science Foundation (NSF) to study quantum entanglement and develop new error-correcting tools for quantum computation. He aims to understand how measurement affects entangled systems and create tools to correct errors caused by quantum decoherence.
A new graphene-based platform allows researchers to control the interaction strength between electrons and holes, enabling the formation of quantum condensates at room temperature. The platform's tunability enables testing of theoretical predictions about superconductivity and its potential for higher temperature limits.
Scientists from Tampere University and National Research Council of Canada develop a technique using two-photon N00N states to create entangled photon pairs with improved measurement precision. This allows for spatially structured quantum states of light that can go beyond classical limits in rotation estimation.
Physicists at Rice University have found telltale signs of antiferromagnetic spin fluctuations coupled to superconductivity in uranium ditelluride, a rare material promising fault-free quantum computing. The discovery upends the leading explanation of how this state of matter arises in the material.
A team of researchers demonstrates an adaptive optimization protocol that can engineer arbitrary high-dimensional quantum states, overcoming limitations due to noise and experimental imperfections. The protocol uses measured agreement between produced and target state to tune experimental parameters.
A team of researchers at Imperial College London has generated and observed non-Gaussian states of high-frequency sound waves comprising over a trillion atoms. This breakthrough makes important strides towards generating macroscopic quantum states that will enable future quantum internet components to be developed.
Scientists from TUM and Google Quantum AI used a highly controllable quantum processor to simulate exotic particles called anyons, which can emerge as collective excitations in two-dimensional systems. The study reveals the properties of these particles through braiding statistics, a key feature of topologically ordered states.
Researchers at Osaka City University developed a new quantum algorithm that calculates potential energy curves of molecules without controlled time evolutions. This addresses issues with conventional quantum phase estimation algorithms, enabling parallel processing and efficient full-CI calculations.
A new study shows that quantum systems can exist in a superposition of forward and backward time flows, blurring the traditional concept of time. This phenomenon has practical implications for quantum thermodynamics, potentially offering advantages in thermal machines and refrigerators.
Researchers created a new ultra-thin material with quantum properties emulating rare earth compounds. The material exhibits the Kondo effect, leading to macroscopically entangled state of matter producing heavy-fermion systems.
A new monitoring protocol preserves coherence in quantum Otto engines, leading to improved power output and reliability. The 'repeated contacts scheme' avoids measurement-induced quantum effects, making the engine more capable and dependable.
Researchers have successfully demonstrated laser emission from ultra-thin crystals consisting of three atomic layers, a breakthrough that could lead to miniaturized circuits and future quantum applications. The discovery showcases the potential of these materials as a platform for new nanolasers capable of operating at room temperature.
A new analytical technique combines quantum physics and molecular biology to track biomolecule changes in less than a trillionth of a second. By analyzing the collective movement of atoms, researchers were able to reduce 6000 dimensions to four and characterize conical intersections of quantum states in complex molecules.
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.
Assistant Professor Kang Hao Cheong and his team discovered that chaotic switching for quantum coin Parrondo's games has similar underlying ideas to encryption. They found that using pre-generated chaotic sequences enhances the work, making it easier to invert the encrypted message to obtain the original state.
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.
Boston College physicists uncover novel charge density waves and symmetry-broken phases in the topological kagome metal CsV3Sb5, leading to superconductivity at low temperatures. The study reveals a 'cascade' of correlated electron states driving electrical conduction and potential implications for unconventional electron pairing.
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 have discovered a new theory that explains the behavior of quantum systems with long-range interactions. The theory predicts that these systems will settle into meta-stable states rather than reaching equilibrium, leading to unique effects such as spiral arms in galaxies.
A new $2.7 million grant from the US Department of Energy will support a three-year research effort to identify and store quantum information in solids, enabling significant advancements in quantum computing. The project aims to build a database of viable qbits by analyzing defects in solids.
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.
Researchers have demonstrated cooling a large-scale object to nearly the motional quantum ground state, increasing sensitivity in detecting gravitational waves. The method achieved an average phonon occupation of 10.8, suppressing quantum back-action noise by 11 orders of magnitude.
Researchers at UChicago have successfully brought multiple molecules into a single quantum state, a major technological feat. This achievement has the potential to open new fields in quantum physics and chemistry, enabling innovative applications such as unhackable networks and earthquake sensors.
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 have successfully controlled quantum jumps in atomic nuclei using X-ray light, enabling ultra-precise atomic clocks and potentially powerful nuclear batteries. The technique requires precise control of high-energy X-ray pulses to manipulate quantum dynamics.
Scientists have found a way to characterize the degree of quantumness in physical systems, which is essential for understanding quantum computing and sensing advantages. By analyzing extrema states, researchers identified a mathematical representation called Majorana constellation, which covers more of the sphere as quantumness increases.
A Harvard team has successfully cooled a six-atom molecule to just above absolute zero using laser light, marking the first time such a complex molecule has been achieved. The breakthrough opens up new avenues of study in quantum simulation and computation, particle physics, and quantum chemistry.
Researchers have developed a new method to calculate the exact entanglement cost of a given quantum state, allowing for more precise measurement and application in various quantum research areas. This breakthrough resolves a longstanding investigation in entanglement theory, enabling efficient computation and broad applicability.
Researchers developed a scalable quantum state verification (QSV) method for entangled states using nonadaptive local measurements. The results demonstrate the efficiency and precision of QSV in characterizing quantum states, particularly for multipartite entangled states.
Researchers discovered a novel exciton state in magnetic van der Waals material NiPS3, which is intrinsically a quantum state arising from a transition between two energy states. This breakthrough has significant implications for the field of quantum information and computing.
Researchers at Columbia University have observed fractional quantum Hall states (FQHS) in a monolayer 2D semiconductor, demonstrating excellent intrinsic quality and establishing it as a unique test platform for studying FQHS. The study reveals unexpected behavior and suggests that 2D semiconductors are close-to-ideal platforms to furt...
Researchers at the Max Planck Institute for Nuclear Physics have successfully measured infinitesimal changes in mass of individual atoms for the first time, opening a new world for precision physics. The team discovered a previously unobserved quantum state in rhenium, which could be interesting for future atomic clocks.
Researchers at the University of Innsbruck propose a new measurement protocol to identify topological states in interacting systems. This method can extract topological invariants from statistical correlations of simple, local random measurements.
Researchers at the University of Basel developed a non-invasive technique to study individual molecules precisely. The new force spectroscopy method detects molecular vibrations without perturbing its quantum state.
Researchers propose updated equations that simplify calculations for distinguishing between two types of 'non-Gaussian curve' and genuinely quantum states. This approach could speed up advances in quantum communication and computation.
Researchers laser-cooled a 150-nanometer glass sphere containing 100 million atoms to its quantum ground state, revolutionizing the study of macro-quantum physics. This achievement enables unprecedented opportunities to test fundamental physics and probe the boundaries between classical and quantum mechanics.
Scientists have isolated and cooled a nanoparticle in a solid, achieving macroscopic quantum control for the first time. By removing thermal energy and isolating the particle from its environment, researchers successfully cooled the glass bead to ultra-cold temperatures near absolute zero.
A new device created by Aalto University and Lund University has set a new standard for measuring the tiniest energies in superconducting circuits. The calorimeter uses a strip of copper one thousand times thinner than a human hair to detect energy changes, providing essential insights into quantum thermodynamics.
A new protocol enables better measurement and comparison of multiple quantum states across devices and time, improving quantum information processing.
A team of researchers from Brown University and Dartmouth College will use a novel approach to study quantum materials and complex quantum states. They aim to design new materials whose properties depend on correlated quantum states, which could lead to error-tolerant quantum computers.
Researchers at OIST Graduate University have developed a new method to detect electrons' transitions to quantum states using image charge detection. This technique has the potential to create a ten-centimeter chip, reducing the size of current quantum computers and bringing them closer to practical use.
Researchers developed an all-fiber device to generate quantum states necessary for quantum key distribution, switching polarization 1 billion times a second. The device is self-compensating and stable, making it suitable for a global quantum network that could protect sensitive data.
Researchers from Carnegie Mellon University have controlled the lifetime of gold nanoclusters' quantum states, extending it by three magnitudes. This breakthrough could improve solar cell and photocatalysis technologies, allowing for more efficient energy harvesting.
Researchers at TU Wien and China's University of Science and Technology have developed a new method to identify topologically interesting quantum states in materials. By manipulating the geometry of atomic arrangements using light waves, they can reveal clear signatures indicating whether such states exist or not.
A team from INRS has successfully generated high-dimensional cluster states and implemented novel quantum operations, paving the way for one-way quantum computing. This breakthrough uses photons as a data medium, leveraging their unique properties to increase information storage capacity and boost computational power.
Bell nonlocality and EPR steering are characterized using strict definitions, establishing a foundation for defining metric functions of Bell locality and EPR steering. The study generalizes previous results and provides sufficient conditions for determining the quantum state's EPR steerability.
ETH Zurich researchers have demonstrated a novel quantum error correction technique that can monitor and correct errors in real-time. The technique, which uses trapped ions to encode quantum information, has been successfully tested with repeated measurements on the same system, exceeding previous experimental limits.
Researchers have isolated groups of a few atoms and precisely measured their multi-particle interactions within an atomic clock. The study reveals unexpected results when three or more atoms are together, including nonlinear shifts in the clock's frequency and long-lived entangled states.
A material called graphene nano-ribbons has different electronic properties depending on its shape and width, allowing for the creation of tailor-made semiconductors, metals or insulators. The ribbons form a chain of interlinked quantum states with adjustable electronic structure.
A new quantum secret-sharing scheme prevents eavesdropping in noisy environments, improving the fidelity of encrypted messages. The scheme exploits the properties of entangled particles to enhance secret transmission.
Researchers at the University of Oklahoma are developing quantum-enhanced plasmonic sensors that can detect biosamples, monitor atmospheric conditions, and analyze chemicals with enhanced sensitivity. The new technology has the potential to revolutionize fields like metrology and chemical detection.
Researchers developed machine learning software that allows computers to learn the quantum state of complex systems based on experimental observations. This approach enables faster tomography for quantum states and has implications for testing quantum computers with many qubits.
Researchers developed a novel verification method to prove large-scale entanglement with only a single measurement run, significantly reducing time and resources required. This breakthrough enables the reliable benchmarking of future quantum devices with unprecedented efficiency.
Researchers have used novel infrared laser techniques to study methane scattering on a nickel surface with full quantum-state resolution. This breakthrough allows for the observation of vibrational energy redistribution during surface scattering, which can be tested by state-of-the-art quantum theories.
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.
Ground-based measurements of quantum states sent by a laser aboard a satellite demonstrate the feasibility of a satellite-based quantum communication network. This breakthrough could enable an extremely secure way to encrypt data sent over long distances, potentially cutting development time in half.
Scientists have experimentally realized a stable exotic quantum state that resists mixing due to disorder, defying predictions of conventional quantum mechanics. The discovery could have implications for the development of robust quantum computers.
A research team at TU Wien developed a new method that combines strong measurements with weak measurements to reconstruct quantum states. This approach allows for higher precision and accuracy in determining the quantum state, reducing the need for post-processing.
Researchers developed a new framework for faster control of a quantum bit, accelerating switching with unprecedented speed. The technique enables less prone to errors in high-speed operation, paving the way for quantum applications like secure communications and simulation of complex systems.
Researchers at ANU and UQ have developed a cloning method that produces higher-quality quantum clones than existing methods, with a success rate of about 5%. This breakthrough could enable ultra-secure encryption over long distances, overcoming the limitations of current quantum communication systems.