Current Metrology News and Events

Current Metrology News and Events, Metrology News Articles.
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A benchmark for single-electron circuits
Manipulating individual electrons with the goal of employing quantum effects offers new possibilities in electronics. In order to gain new insights into the physical origin and into metrological aspects of the small, but inevitable fundamental uncertainties governed by the rules of quantum mechanics, scientists from the Physikalisch-Technische Bundesanstalt(PTB) and the University of Latvia have collaborated to develop a statistical testing methodology. Their results have been published in the journal Nature Communications. (2021-01-26)

Record-breaking laser link could help us test whether Einstein was right
Scientists from Australia have set a world record for the most stable transmission of a laser signal through the atmosphere. The team combined Aussie 'phase stabilisation' technology with advanced self-guiding optical terminals to 'effectively eliminate atmospheric turbulence,' an advance which could help test Einstein's theory of general relativity. (2021-01-22)

Scientists reach limit of multi-parameter quantum measurement with zero trade-off
Real-life applications like magnetometry or quantum gyroscope typically involve precise measurement on multiple parameters. How to achieve the ultimate precision limits simultaneously is a long sought-after grail in the field. (2021-01-04)

Experiments first verify distributed quantum phase estimation
Professor PAN Jianwei and his colleges from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) have achieved the experimental verification of distribution quantum phase estimation for the first time. This work was published on Nature Photonics. (2020-12-21)

Attosecond interferometry in time-energy domain
Analogous to the conventional spatial double-slit experiment, the time domain Young's experiment can be realized by using temporal slits for diffraction instead, and fringes in the energy domain are expected. As a time-energy domain interferometric device, the temporal Young's interferometer is anticipated to possess advantageous time resolving capability and holds the promise of tracking ultrafast processes. Scientists from China developed an all-optical attosecond few-slit interferometer and demonstrated its applications in time-energy domain high precision measurement (2020-11-24)

AI speeds up development of new high-entropy alloys
POSTECH's joint research team identifies a deep learning method for phase prediction of high-entropy alloys. (2020-11-11)

Graphene controls laser frequency combs in fiber
Tuning laser frequency combs electrically can enrich diversity of comb outputs and help to stabilize them actively. By using a graphene heterogeneous fiber microcavity, researchers recently achieve such electrically tunable laser microcombs in-situ. In this implementation, graphene heterostructure was utilized as saturable absorber, temperature controller and dynamic feedback receiver simultaneously. Hence, rich frequency combs with span over half an octave, repetition 10GHz~80GHz, and phase noise down to -130 dBc/Hz@10kHz are generated. (2020-11-11)

Signals from distant stars connect optical atomic clocks across Earth for the first time
Using radio telescopes observing distant stars, scientists have connected optical atomic clocks on different continents. The results were published in the scientific journal Nature Physics by an international collaboration between 33 astronomers and clock experts at the National Institute of Information and Communications Technology (NICT, Japan), the Istituto Nazionale di Ricerca Metrologica (INRIM, Italy), the Istituto Nazionale di Astrofisica (INAF, Italy), and the Bureau International des Poids et Mesures (BIPM, France). (2020-10-08)

Helium, a little atom for big physics
Helium is the simplest multi-body atom. Its energy levels can be calculated with extremely high precision only relying on a few fundamental physical constants and the quantum electrodynamics (QED) theory. This makes the helium atom a very good platform for testing QED and these constants. A review of recent studies of helium atom precision spectroscopy towards this direction is presented in the National Science Review. (2020-09-28)

A novel approach produces a completely new kind of dynamic light structure
In a paper published in Nature Communications, USC Viterbi School of Engineering researchers showed how combining twisted light and frequency combs together can produce an even more novel structure of light. (2020-08-24)

'Quantum negativity' can power ultra-precise measurements
Scientists have found that a physical property called 'quantum negativity' can be used to take more precise measurements of everything from molecular distances to gravitational waves. (2020-07-29)

USTC finds ultimate precision limit of multi-parameter quantum magnetometry
Researchers obtained the ultimate precision for the estimation of all three components of a magnetic field with entangled probe states under the parallel scheme. (2020-07-20)

On-chip spin-Hall nanograting for simultaneously detecting phase and polarization singularities
A plasmonic spin-Hall nanograting structure that simultaneously detects both the polarization and phase singularities of the incident beam is reported. The nanograting is symmetry-breaking with different periods for the upper and lower parts, which enables the unidirectional excitation of the SPP depending on the topological charge of the incident beam. Additionally, spin-Hall meta-slits are integrated onto the grating so that the structure has a chiral response for polarization detection. (2020-07-07)

Light from inside the tunnel
Steering and monitoring the light-driven motion of electrons inside matter on the time-scale of a single optical cycle is a key challenge in ultrafast light wave electronics and laser-based material processing. Physicists from the Max Born Institute in Berlin and the University of Rostock have now revealed a so-far overlooked nonlinear optical mechanism that emerges from the light-induced tunneling of electrons inside dielectrics. (2020-06-30)

Researchers employ antennas for angstrom displacement sensing
Micro -- nano Optics and Technology Research Group led by Prof. LU Yonghua and Prof. WANG Pei from University of Science and Technology of China realized nanometric displacement measurement through the interaction between the illumination optical field and the optical antennas. (2020-06-28)

Physicists create quantum-inspired optical sensor
Researchers from the MIPT, joined by a colleague from Argonne National Laboratory, U.S., have implemented an advanced quantum algorithm for measuring physical quantities using simple optical tools. Published in Scientific Reports, their study takes us a step closer to affordable linear optics-based sensors with high performance characteristics. Such tools are sought after in diverse research fields, from astronomy to biology. (2020-06-05)

Computational imaging benefits from untrained neural network
In a recent study, investigators from the Chinese Academy of Sciences described how they combined an untrained neural network and physics knowledge to eliminate the limitations of deep-learning-based CI methods. (2020-05-06)

Colliding solitons in optical microresonators
Solitons in optical microresonators are frequently used to generate frequency combs, which have found applications in sensing, telecommunication, and metrology. Now, scientists at EPFL have discovered a novel state of colliding solitons, which reveals interesting properties that can be used in both fundamental studies and practical applications. (2020-04-24)

Quantum entanglement offers unprecedented precision for GPS, imaging and beyond
UA engineers have demonstrated for the first time that it's possible to connect a network of sensors through quantum entanglement. The experiment opens a door to unprecedented levels of sensitivity in GPS navigation, medical imaging and astronomy. (2020-04-17)

New quantum technology could help diagnose and treat heart condition
The conductivity of living organs, such as the heart, could be imaged non-invasively using quantum technology developed by UCL researchers, which has the potential to revolutionise the diagnosis and treatment of atrial fibrillation. (2020-03-31)

USTC realizes the first quantum-entangling-measurements-enhanced quantum orienteering
Researchers enhanced the performance of quantum orienteering with entangling measurements via photonic quantum walks. (2020-02-25)

Moving precision communication, metrology, quantum applications from lab to chip
Photonic integration has focused on communications applications traditionally fabricated on silicon chips, because these are less expensive and more easily manufactured, and researchers are exploring promising new waveguide platforms that provide these same benefits for applications that operate in the ultraviolet to the infrared spectrum. These platforms enable a broader range of applications, such as spectroscopy for chemical sensing, precision metrology and computation. A paper in APL Photonics provides a perspective of the field. (2020-02-13)

Experimental measurement of the quantum geometric tensor using coupled qubits in diamond
Geometry and topology are fundamental concepts in matter science. In quantum mechanics, the geometry of quantum states is fully captured by the quantum geometric tensor. The complete quantum geometric tensor of a solid-state spin system is measured through coherent dynamical responses. (2020-02-10)

Counting photons is now routine enough to need standards
NIST has taken a step toward enabling universal standards for single-photon detectors (SPDs), which are becoming increasingly important in science and industry. (2019-12-20)

Laser-based prototype probes cold atom dynamics
In new work published in EPJ D, a team of physicists in France presents an innovative prototype for a new industrial laser system. Their design paves the way for the development of cold atom inertial sensors in space. (2019-12-16)

Quantum expander for gravitational-wave observatories
Gravitational-wave detectors use ultra-stable laser light stored in optical cavities to achieve the high sensitivity for detecting gravitational-wave signals from merging binary black holes and neutron stars. However, optical cavities limit the frequency range, over which the detector is sensitive to these signals. Now scientists from Germany and USA invented a new technique of quantum expansion, which would allow to increase the detector's sensitivity range, providing access to new physics of quantum state of matter. (2019-12-10)

A question of pressure
The Physikalisch-Technische Bundesanstalt (PTB) has implemented a novel pressure measurement method, as a byproduct of the work on the 'new' kelvin. As a primary method it only depends on natural constants. It offers unique possibilities to check the most accurate pressure gauges, for which PTB is known as the world leader, and to investigate helium - an important model system for the fundamentals of physics. (current issue of Nature Physics) (2019-12-02)

Light in a new light
In a paper published today in Nature's NPJ Quantum Information, Omar Magaña-Loaiza, assistant professor in the Louisiana State University Department of Physics & Astronomy, and his team of researchers describe a noteworthy step forward in the quantum manipulation and control of light. (2019-09-27)

Laser-based system detects fires even in dusty, harsh environments
Researchers have developed a new laser-based system that offers an efficient and low-cost way to detect fires in challenging environments such as industrial facilities or large construction sites. With further development, the system could eventually detect fires that are more than a kilometer away. (2019-09-25)

Spinning lightwaves on a one-way street
Researchers at Purdue University have created a quantum spin wave for light. This can be a carrier of information for future nanotechnologies but with a unique twist: they only flow in one direction. (2019-08-19)

Researchers teleport information within a diamond
Researchers from the Yokohama National University have teleported quantum information securely within the confines of a diamond. The study has big implications for quantum information technology -- the future of how sensitive information is shared and stored. The researchers published their results on June 28, 2019 in Communications Physics. (2019-06-28)

Secure quantum communications in the microwave range for the first time
Mikel Sanz, of the Physical Chemistry Department of UPV/EHU, leads the theoretical group for an experiment published by the prestigious magazine, Nature Communications. The experiment has managed to prepare a remote quantum state; i.e., absolutely secure communication was established with another, physically separated quantum computer for the first time in the microwave regime. This new technology may bring about a revolution in the next few years. (2019-06-19)

Original kilogram replaced -- new International System of Units (SI) entered into force
In addition to Ampere, Kelvin, Mol and Co., the kilogram also is now defined by a natural constant. In concrete terms, this means that the original kilogram, which has been the measure of all things for 130 years, has now served its purpose in Paris. This is made possible by the single crystals grown from the highly enriched isotopic silicon-28 at the Leibniz-Institut für Kristallzüchtung (IKZ). (2019-05-21)

New measurement device: Carbon dioxide as geothermometer
For the first time it is possible to measure, simultaneously and with extreme precision, four rare molecular variants of carbon dioxide (CO2) using a novel laser instrument. As a new type of geothermometer, the laser-spectroscopy-based measurement device is significant for scientific disciplines investigating, for example, climatic conditions in Earth's history. It was developed by a German-French research team with environmental physicists from Heidelberg University. (2019-05-20)

New 3-D printing approach makes cell-scale lattice structures
A new way of making scaffolding for biological cultures could make it possible to grow cells that are highly uniform in shape and size, and potentially with certain functions. The new approach uses an extremely fine-scale form of 3-D printing, using an electric field to draw fibers one-tenth the width of a human hair. (2019-03-26)

On-chip, electronically tunable frequency comb
Now, researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences and Stanford University have developed an integrated, on-chip frequency comb that is efficient, stable and highly controllable with microwaves. (2019-03-18)

Exploring the global landscape of quantum technology research
Leading quantum technology experts from around the world have explored their respective regional and national goals for the future of the field, in a new focus issue of Quantum Science and Technology. The first five articles in the collection, covering Australia, Japan, the United States, Canada and the European Union, are published today. They are written by the leading researchers involved in each country or region's initiative. (2019-02-22)

Diagnosing 'art acne' in Georgia O'Keeffe's paintings
A multidisciplinary team from Northwestern University and the Georgia O'Keeffe Museum in Santa Fe, New Mexico has diagnosed the strange paint disease causing Georgia O'Keeffe's paintings to deteriorate. The micron-sized protrusions are metal soaps, resulting from a chemical reaction between the metal ions and fatty acids commonly used as binder in paints. (2019-02-16)

NRL, AFRL develop direct-write quantum calligraphy in monolayer semiconductors
An interdisciplinary team of researchers at NRL and the Air Force Research Laboratory have developed a way to directly write quantum light sources, which emit a single photon of light at a time, into monolayer semiconductors. (2019-02-14)

When AI and optoelectronics meet: Researchers take control of light properties
Researchers from INRS and the University of Sussex customize the properties of broadband light sources using an AI algorithm and a photonic chip. (2018-11-20)

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