Quantum Measurement
Articles tagged with Quantum Measurement
Researchers measure energy below a zeptojoule–enough for a red blood cell to move a nanometer
Scientists have successfully measured incredibly small amounts of energy using a novel calorimeter technique, achieving a world-first in sensitivity. The breakthrough could pave the way for counting individual photons and detecting elusive dark-matter axions in space.
Breakthrough in magnon research paves the way for mini quantum computers
Physicists at the University of Vienna have successfully extended the lifetime of magnons, tiny waves in magnetization, to a hundredfold, paving the way for mini quantum computers. The discovery reveals that materials science is key to further progress, rather than fundamental physics.
Quantum materials: Volkswagen Foundation provides €2 million for Eckhardt Endowed Professorship at Goethe University
Researchers at Goethe University Frankfurt are exploring modern quantum materials, which exhibit fascinating phenomena in response to external stimuli. Olena Fedchenko investigates electronic structure and properties of these materials using various photon sources.
Multitasking quantum sensors can measure several properties at once
Researchers at MIT have developed a way to measure multiple physical quantities with solid-state quantum sensors, exploiting entanglement to overcome signal mixing. This approach enables deeper understanding of the behavior of atoms and electrons in materials and living systems, such as cancer cells.
Does gravity follow the rules of quantum mechanics?
A team of researchers led by Kazuhiro Yamamoto has proposed a method to create a momentum-squeezed state in movable mirrors, which significantly broadens the quantum superposition of a mirror's position. This approach can amplify the signal of quantum entanglement generated by gravity, making it easier to detect.
Precision boost for quantum sensor technology
Researchers at the University of Würzburg have directly measured the 'waiting time' in a two-dimensional material, which lasts exactly 24 billionths of a second. This knowledge increases the accuracy of atomic sensors and paves the way for future medical diagnostics.
Experimental evidence shows how photons spread across multiple paths in an interferometer
Researchers at Hiroshima University have developed a new experimental method to demonstrate the physical delocalization of individual photons in an interferometer. The study challenges traditional interpretations of quantum mechanics and has significant implications for high-tech sensors and our understanding of reality.
Quantum-inspired laser system delivers distance measurements with sub-millimetre accuracy
A new laser range-finding technique inspired by quantum physics has been demonstrated with sub-millimetre accuracy in real-world environments. The system suppresses noise from sunlight and atmospheric conditions, enabling applications in autonomous vehicles, surveying, and space exploration.
Targeted shaking stabilizes exotic quantum states
Researchers discovered that carefully designed random pulses can drastically slow down unwanted heating in superconducting quantum computers, enabling complex quantum simulations. The study confirmed exotic quantum states of matter using a 78-qubit processor and explored new states of matter beyond classical computer capabilities.
$9M for exploring the fundamental limits of entangled quantum sensor networks
Researchers aim to harness entanglement for high-precision networking, improving measurement sensitivity and resolving finer details. The five-year effort seeks to establish ways to maintain entanglement over time, paving the way for a future quantum internet.
The quantum trembling: Why there are no truly flat molecules
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’ unlock a new toolbox for quantum computers
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.
Rolling out the carpet for Spin Qubits with new chip architecture
Researchers developed a new chip architecture called QARPET, which allows for the characterization of hundreds of qubits under the same operating conditions. The platform features a tiled approach to qubit measurement, making it efficient and scalable.
A new way to decipher quantum systems
A team from UNIGE developed a new approach to characterise quantum states without direct measurements, using transport measurements based on particle flow. This method opens up possibilities for open quantum devices and sensors in various fields, including healthcare and geophysics.
We have no idea what most of the universe is made of, but scientists are closer than ever to finding out
Researchers at Texas A&M University are building highly sensitive detectors to explore dark matter and energy. The team's work builds on previous breakthroughs in detecting low-mass particles, and they aim to find ways to amplify signals that were previously buried in noise.
Naval aviator turned NPS doctoral student earns national recognition for applied quantum research
A NPS doctoral student has been recognized for his groundbreaking research on quantum sensing, aiming to detect minuscule changes in mass from afar. The project involves building an atomic fountain, which will enable sensitivity to gravity nine decimal places of precision.
Diamond defects, now in pairs, reveal hidden fluctuations in the quantum world
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.
Reading a quantum clock costs more energy than running it, study finds
A new study by the University of Oxford finds that the energy cost of reading a quantum clock far outweighs the cost of running it, with implications for future quantum technologies. The researchers discovered that the act of measurement itself is a significant source of entropy in quantum timekeeping.
Miniscule wave machine opens big scientific doors
University of Queensland researchers have developed a microscopic 'ocean' on a silicon chip, allowing for the study of wave dynamics at an unprecedented scale. The device, made with superfluid helium, enables the observation of striking phenomena, including waves that lean backward and shock fronts.
Proven quantum advantage: Researchers cut the time for a learning task from 20 million years to 15 minutes
A new paper in Science reports proven quantum advantage, where entangled light lets researchers learn a system's noise with very few measurements. The experiment cuts the number of measurements needed by an enormous factor, from 20 million years to just 15 minutes.
Scientists sidestep Heisenberg uncertainty principle in precision sensing experiment
Researchers at the University of Sydney have developed a new strategy to precisely measure position and momentum simultaneously, sacrificing some global information for finer detail. This breakthrough could enable ultra-precise quantum sensors for navigation, medicine, astronomy, and fundamental physics applications.
New quantum sensors can withstand extreme pressure
Researchers at Washington University in St. Louis have created quantum sensors that can measure stress and magnetism in materials under pressure exceeding 30,000 times the atmospheric pressure. These breakthrough sensors offer a new frontier for studying high-pressure phenomena in fields like astronomy, geology, and superconductivity.
Measuring the quantum W state
Kyoto University researchers successfully developed an entangled measurement method for the W state, enabling efficient identification of entangled states. The team used a photonic quantum circuit and demonstrated its feasibility with three-photon W states.
Artificial intelligence helps boost LIGO
Researchers developed a new AI method called Deep Loop Shaping to quiet unwanted noise in LIGO's detectors, achieving 30-100 times better performance than traditional methods. This technology will help improve LIGO's ability to detect bigger black holes and build next-generation gravitational-wave detectors.
Quantum researchers observe real-time switching of the magnet in the heart of a single atom
Researchers from Delft University of Technology have successfully measured the nuclear spin of an on-surface atom in real time, achieving 'single-shot readout'. This breakthrough enables control over the magnetic nucleus and opens up possibilities for quantum sensing at the atomic scale.
Solved: 90-year-old mystery in quantum physics
Researchers at the University of Vermont found an exact solution to a model that behaves as a damped quantum harmonic oscillator. This discovery has significant implications for ultra-precision sensor technologies and the measurement of quantum distances.
New breakthrough method to protect quantum spins from noise
Researchers have discovered a simple way to protect atoms from losing information by shining a single laser beam on them, reducing spin relaxation rates. The technique uses light to subtly shift atomic energy levels, aligning spins and keeping them in sync even as they collide with each other or surroundings.
Magically reducing errors in quantum computers
Researchers from The University of Osaka develop a method to prepare high-fidelity 'magic states' for use in quantum computers with less overhead and unprecedented accuracy. This breakthrough aims to overcome the significant obstacle of noise in quantum systems, which can ruin computer setups.
New quantum navigation device uses atoms to measure acceleration in 3D
Physicists at the University of Colorado Boulder have developed a new type of atom interferometer that can measure acceleration in three dimensions. The device, which employs six lasers and artificial intelligence, has the potential to revolutionize navigation technology by providing accurate measurements in complex environments.
New biosensor solves old quantum riddle
Researchers create new quantum biosensor using diamond nanoparticles and specially engineered shell, outperforming previous attempts. The breakthrough sheds light on a longstanding mystery in quantum materials and shows up to fourfold improvements in spin coherence.
MIT engineers advance toward a fault-tolerant quantum computer
Researchers achieved a type of coupling between artificial atoms and photons that could enable readout and processing of quantum information in a few nanoseconds. This breakthrough demonstrates the fundamental physics behind nonlinear light-matter coupling, a crucial step toward realizing fault-tolerant quantum computing.
Overcoming the quantum sensing barrier
Researchers have demonstrated a new quantum sensing technique that surpasses conventional methods by counteracting the limitation of decoherence. The study's coherence-stabilized protocol allows for improved sensitivity and detection of subtle signals, with up to 1.65 times better efficacy per measurement.
Quantum cooling engine fueled by quantum measurements
Researchers developed a quantum cooling engine that manipulates energy flow without feedback control, relying solely on quantum measurements. The engine successfully reversed heat flow, with entanglement found to influence the energy exchange between the working substance and measurement apparatus.
Scientists discover pioneering technique to accelerate accurate quantum measurements
Researchers at the University of Bristol have discovered a novel way to accelerate accurate quantum measurements by trading space for time using additional qubits. This method enables faster and more confident measurements without sacrificing accuracy, with potential applications in leading quantum hardware platforms.
‘Cosmic radio’ could find dark matter in 15 years
Researchers at King's College London and Harvard University develop a detector that can identify axions, leading potential candidates for dark matter. The Axion Quasiparticle (AQ) technology has the potential to discover dark matter in five years with further development.
CCNY physicists uncover electronic interactions mediated via spin waves
Researchers at CCNY have made a groundbreaking discovery of electronic interactions mediated via spin waves in 2D magnets. The interaction between excitons is controlled externally using a magnetic field, enabling the development of novel quantum transducers and advanced technologies.
Deep in the Mediterranean, in search of quantum gravity
A study published in JCAP has established upper limits on the strength of quantum gravity effects on neutrino oscillations, providing valuable insights into the long-sought theory. The results show no signs of decoherence, a phenomenon that could be a key indicator of quantum gravity's presence.
Advancing antiferromagnetic spintronics for next-gen memory and computing
Researchers at UC Riverside will explore how antiferromagnetic spintronics can improve memory density and computing speed. The project aims to develop ultrafast spin-based technology using special antiferromagnets with potential applications in advanced memory and computing.
Twisting atomically thin materials could advance quantum computers
Scientists at the University of Rochester have discovered a way to create artificial atoms within twisted monolayers of molybdenum diselenide, retaining information when activated by light. This breakthrough could lead to new types of quantum devices, such as memory or nodes in a quantum network.
Quantum-inspired cameras capture the start of life
Researchers at the University of Adelaide used quantum-sensitive cameras to image embryos, capturing biological processes in their natural state. The sensitive detection of photons allows for gentle illumination and minimizes damage from light, enabling researchers to study live cells and developing specimens.
Quantum interference in molecule-surface collisions
Researchers have developed a method to observe quantum interference in surface collisions of methane molecules, revealing clear patterns of wave-like behavior that amplify or cancel out different pathways. This discovery confirms the active role of quantum mechanics in controlling molecular interactions at surfaces.
Physicists uncover evidence of two arrows of time emerging from the quantum realm
Researchers at the University of Surrey discovered evidence of opposing arrows of time emerging from quantum systems. The study suggests that time's arrow may not be fixed, and instead could flow in both forward and backward directions due to processes taking place at the quantum level.
Last chance to get a hotel discount for the world’s largest physics meeting
Discounted hotel rates available at select hotels near the Anaheim Convention Center. The Global Physics Summit will feature nearly 14,000 individual presentations on new research in various fields.
A "nano-oscillator" has been created in Florence on the border between classical physics and quantum physics
Researchers at CNR-INO develop device to explore boundary between classical and quantum physics, enabling study of nanosystems in both regimes. The nano-oscillator traps glass spheres with specific frequencies, exhibiting counterintuitive quantum behaviors.
Fraunhofer IAF launches virtual application lab for quantum sensing
The virtual application laboratory provides comprehensive technical knowledge and interactive measurement scenarios for quantum sensors. Industry can interactively assess the potential of this technology for their needs, with expert knowledge available through accompanying resources.
Tiny compasses could improve navigation, brain imaging and more
Researchers have discovered a new way to measure magnetic field orientation using tiny atom-based compasses. The technology has the potential to create precise measurement devices for various applications, including navigation, brain imaging, and medical research.
Fox and rabbit in the quantum world
Quantum particles can behave like foxes and rabbits, with one attracting the other but also repelling it, leading to constant motion and formation of time crystals. This effect can be realized in open quantum systems using coupled atoms driven by laser light.
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors
Researchers used quantum squeezing to improve gas sensing performance of optical frequency comb lasers, doubling the speed of detectors. The technique allowed for more precise measurements with fewer errors, enabling faster detection of molecules like hydrogen sulfide.
U of T researchers develop tool to fast-track measurement of protein interactions for drug discovery
Researchers at U of T have created SIMPL2, a platform that simplifies detection and improves accuracy of protein-protein interactions. The tool enables the rapid identification of protein interactions, including weak ones, for targeted drug therapies.
Toward quantum for the real world: Photonic team in running for center-level funding
The University of Michigan's QuPID project seeks to develop robust quantum systems for applications like environmental monitoring, GPS navigation and semiconductor chip quality control. The team aims to create design kits for global adaptation and simplify instrumentation needed to manipulate light properties.
Overcoming one of the challenges of quantum mechanics: towards the control of chemical reactions
A team of international researchers successfully controlled the quantum states of matter at ultrafast time scales and its chemical properties with extreme precision using light in the extreme ultraviolet. The technique was demonstrated on helium atoms, enabling the enhancement of selected quantum processes while suppressing others.
Novel quantum materials in the spotlight
German physicist Christian Schneider has been awarded a European Research Council Consolidator Grant to study the optical properties of two-dimensional materials. His team plans to develop experimental set-ups to investigate the unique properties of these materials, which could lead to new applications in quantum technologies.
Wits researchers use laser beams to pioneer new quantum computing breakthrough
Physicists at the University of the Witwatersrand developed an innovative computing system harnessing laser beams and display technology to process multiple possibilities simultaneously. This approach could speed up complex calculations in fields like logistics and finance, with potential applications in quantum optimisation and machin...
New theory reveals the shape of a single photon
Researchers at the University of Birmingham have developed a new theory that explains how light and matter interact at the quantum level. The theory enables scientists to precisely define the shape of a single photon for the first time.
Viscous electronics: Fluid-like electrons are unlocking new tech possibilities
Researchers have discovered that electrons in certain quantum materials behave like a viscous fluid, allowing for the detection of terahertz waves. This breakthrough enables faster data transfer and advanced medical imaging technologies.
New quantum timekeeper packs several clocks into one
Researchers at the University of Colorado Boulder have developed a new quantum timekeeper that combines four different clocks into one, allowing for increased precision. The device uses entanglement to reduce uncertainty in its ticking, enabling it to beat benchmark standards for optical atomic clocks.
High-dimensional photonics accelerates quantum computing
A new study by Prof. Yaron Bromberg and Dr. Ohad Lib from the Hebrew University of Jerusalem has made significant progress in quantum computing through photonic-measurement-based quantum computation. They successfully generated cluster states with over nine qubits at a frequency of 100 Hz, overcoming scalability barriers.
'Squeezing' increased accuracy out of quantum measurements
Researchers at Tohoku University have successfully applied quantum squeezing to enhance the accuracy of measurements in complex quantum systems. By reducing uncertainty in one aspect while increasing it in another, they can measure variables like position and momentum with greater precision.
X-rays from atomic systems could reveal new clues about rival quantum theories
Physicists propose a refined way to test the validity of alternative quantum models, which offer a possible explanation for quantum-classical transition. The team found big differences with previous expectations for low-energy X-ray radiation, depending on atomic species and specific collapse model.