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The latest news in physics, materials science, quantum physics, optics and photonics, superconductivity science and technology. Updated Daily.

 
 
1. A molecular fingerprint beyond the Nyquist frequency00:08[-/+]
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Ultrashort pulses play a significant role in spectroscopic applications. Their broad spectral bandwidth enables simultaneous characterization of the sample at various frequencies, eliminating the need for repeated measurements or laser tuning. Moreover, their extreme temporal confinement allows for temporal isolation of the sample's response from the main excitation pulse.

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2. Scientists tune the entanglement structure in an array of qubitsСр, 24 апр[-/+]
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Entanglement is a form of correlation between quantum objects, such as particles at the atomic scale. The laws of classical physics cannot explain this uniquely quantum phenomenon, yet it is one of the properties that explain the macroscopic behavior of quantum systems.

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3. A shade closer to more efficient organic photovoltaicsСр, 24 апр[-/+]
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Transparent solar cells will transform the look of infrastructure by enabling many more surfaces to become solar panels. Now, materials called non-fullerene acceptors that can intrinsically generate charges when exposed to sunlight could make semitransparent organic photovoltaics easier to produce, a KAUST-led international team shows.

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4. A novel universal light-based technique to control valley polarization in bulk materialsСр, 24 апр[-/+]
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Electrons inside solid materials can only take certain values of energy. The allowed energy ranges are called "bands," and the space between them, the forbidden energies, is known as "band gaps." Both of them together constitute the "band structure" of the material, which is a unique characteristic of each specific material.

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5. Lead-vacancy centers in diamond as building blocks for large-scale quantum networksСр, 24 апр[-/+]
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Much like how electric circuits use components to control electronic signals, quantum networks rely on special components and nodes to transfer quantum information between different points, forming the foundation for building quantum systems.

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6. Scientists develop novel one-dimensional superconductorСр, 24 апр[-/+]
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In a significant development in the field of superconductivity, researchers at The University of Manchester have successfully achieved robust superconductivity in high magnetic fields using a newly created one-dimensional (1D) system. This breakthrough offers a promising pathway to achieving superconductivity in the quantum Hall regime, a longstanding challenge in condensed matter physics.

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7. Making light 'feel' a magnetic field like an electron wouldСр, 24 апр[-/+]
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Unlike electrons, particles of light are uncharged, so they do not respond to magnetic fields. Despite this, researchers have now experimentally made light effectively "feel" a magnetic field within a complicated structure called a photonic crystal, which is made of silicon and glass.

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8. Light stands still in a deformed crystalСр, 24 апр[-/+]
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AMOLF researchers, in collaboration with Delft University of Technology, have succeeded in bringing light waves to a halt by deforming the two-dimensional photonic crystal that contains them. The researchers show that even a subtle deformation can have a substantial effect on photons in the crystal. This resembles the effect that a magnetic field has on electrons.

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9. Scientists at the MAJORANA Collaboration look for rule-violating electronsСр, 24 апр[-/+]
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In a new study published inNature Physics, scientists at the MAJORANA Collaboration have tested the stringency of charge conservation and Pauli's exclusion principles using underground detectors. Alessio Porcelli has published a News & Views piece on the research in the same journal.

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10. Tailoring electron vortex beams with customizable intensity patterns by electron diffraction holographyВт, 23 апр[-/+]
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A new research study from Opto-Electronic Advances discusses tailoring electron vortex beams with customizable intensity patterns by electron diffraction holography.

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11. How light can vaporize water without the need for heatВт, 23 апр[-/+]
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It's the most fundamental of processes—the evaporation of water from the surfaces of oceans and lakes, the burning off of fog in the morning sun, and the drying of briny ponds that leaves solid salt behind. Evaporation is all around us, and humans have been observing it and making use of it for as long as we have existed.

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12. Spintronics research shows material's magnetic properties can predict how a spin current changes with temperatureВт, 23 апр[-/+]
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Spintronics is a field garnering immense attention for its range of potential advantages for conventional electronics. These include reducing power consumption, high-speed operation, non-volatility, and the potential for new functionalities.

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13. CMS Collaboration observes new all-heavy quark structuresВт, 23 апр[-/+]
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For over a decade, the CMS Collaboration, a large team of researchers based at different institutes worldwide, has been analyzing data collected at the Compact Muon Solenoid, a general-purpose particle detector at CERN's Large Hadron Collider (LHC). This large-scale international scientific collaboration has been trying to observe various elusive physical phenomena, including exotic particles and dark matter candidates.

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14. The big quantum chill: Scientists modify common lab refrigerator to cool faster with less energyВт, 23 апр[-/+]
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By modifying a refrigerator commonly used in both research and industry, researchers at the National Institute of Standards and Technology (NIST) have drastically reduced the time and energy required to cool materials to within a few degrees above absolute zero.

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15. Novel method could explore gluon saturation at the future electron-ion colliderВт, 23 апр[-/+]
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The U.S. nuclear physics community is preparing to build the electron–ion collider (EIC), a flagship facility for probing the properties of matter and the strong nuclear force that holds matter together. The EIC will allow scientists to study how nucleons (protons and neutrons) arise from the complex interactions of quarks and gluons.

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16. Record electron temperatures for a small-scale, sheared-flow-stabilized Z-pinch fusion device achievedВт, 23 апр[-/+]
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In the nine decades since humans first produced fusion reactions, only a few fusion technologies have demonstrated the ability to make a thermal fusion plasma with electron temperatures hotter than 10 million degrees Celsius, roughly the temperature of the core of the sun. Zap Energy's unique approach, known as a sheared-flow-stabilized Z pinch, has now joined those rarefied ranks, far exceeding this plasma temperature milestone in a device that is a fraction of the scale of other fusion systems.

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17. Hunting for the elusive: IceCube observes seven potential tau neutrinosВт, 23 апр[-/+]
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Researchers at the IceCube Neutrino Observatory in Antarctica have found seven signals that could potentially indicate tau neutrinos—which are famously hard to detect—from astrophysical objects.

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18. Manipulating the geometry of the 'electron universe' in magnetsВт, 23 апр[-/+]
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Researchers at Tohoku University and the Japan Atomic Energy Agency have developed fundamental experiments and theories to manipulate the geometry of the "electron universe," which describes the structure of electronic quantum states in a manner mathematically similar to the actual universe, within a magnetic material under ambient conditions.

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19. Study shines light on properties and promise of hexagonal boron nitride, used in electronic and photonics technologiesВт, 23 апр[-/+]
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Single-photon emitters (SPEs) are akin to microscopic lightbulbs that emit only one photon (a quantum of light) at a time. These tiny structures hold immense importance for the development of quantum technology, particularly in applications such as secure communications and high-resolution imaging. However, many materials that contain SPEs are impractical for use in mass manufacturing due to their high cost and the difficulty of integrating them into complex devices.

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20. Tunable quantum anomalous Hall effects in van der Waals heterostructuresВт, 23 апр[-/+]
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The quantum anomalous Hall effect (QAHE) has unique advantages in topotronic applications, but realizing the QAHE with tunable magnetic and topological properties for building functional devices is still a key scientific challenge. Through first-principles calculations, researchers have predicted a candidate material that meets these requirements.

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21. Announcing the birth of QUIONE, a unique analog quantum processorПн, 22 апр[-/+]
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Quantum physics requires high-precision sensing techniques to delve deeper into the microscopic properties of materials. From the analog quantum processors that have emerged recently, quantum-gas microscopes have proven to be powerful tools for understanding quantum systems at the atomic level. These devices produce images of quantum gases with very high resolution: They allow individual atoms to be detected.

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22. New 2D material manipulates light with remarkable precision and minimal lossПн, 22 апр[-/+]
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Responding to the increasing demand for efficient, tunable optical materials capable of precise light modulation to create greater bandwidth in communication networks and advanced optical systems, a team of researchers at NYU Abu Dhabi's Photonics Research Lab (PRL) have developed a novel, two-dimensional (2D) material capable of manipulating light with exceptional precision and minimal loss.

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23. Realization of an ideal omnidirectional invisibility cloak in free spaceПн, 22 апр[-/+]
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A team led by Prof. Dexin Ye and Prof. Hongsheng Chen from Zhejiang University, and Prof. Yu Luo from Nanyang Technological University conducted research on the practical implementation of full-parameter transformation optical devices. Based on the linear transformation optics and the constitution theory of omnidirectionally matched transparent metamaterials, the research team designed and implemented a full-parameter omnidirectional invisibility cloak capable of concealing large-scale objects in free space.

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24. Steering toward quantum simulation at scaleПн, 22 апр[-/+]
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Researchers simulated a key quantum state at one of the largest scales reported, with support from the Quantum Computing User Program, or QCUP, at the Department of Energy's Oak Ridge National Laboratory.

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25. Superradiant atoms could push the boundaries of how precisely time can be measuredПн, 22 апр[-/+]
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Superradiant atoms can help us measure time more precisely than ever. In a recent study, researchers from the University of Copenhagen present a new method for measuring the time interval, the second, mitigating some of the limitations that today's most advanced atomic clocks encounter. The result could have broad implications in areas such as space travel, volcanic eruptions and GPS systems.

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26. Study shows ultra-thin two-dimensional materials can rotate the polarization of visible lightПн, 22 апр[-/+]
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It has been known for centuries that light exhibits wave-like behavior in certain situations. Some materials are able to rotate the polarization, i.e. the direction of oscillation, of the light wave when the light passes through the material. This property is utilized in a central component of optical communication networks known as an "optical isolator" or "optical diode." This component allows light to propagate in one direction but blocks all light in the other direction.

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27. Toward a unified theory for dynamics of glassy materialsПн, 22 апр[-/+]
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In the realm of disorder and amorphous systems, such as oxide glasses utilized in display technologies and the cryogenic preservation of biological materials, there exists a substantial body of contemporary scientific and technological exploration.

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28. Beta-decay measurements in mirror nuclei pin down the weak nuclear forceПн, 22 апр[-/+]
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The Standard Model of Particle Physics is scientists' best understanding of the forces that describe how subatomic particles interact. The Standard Model encompasses four forces: the strong nuclear force, the weak nuclear force, the electromagnetic force, and the gravitational force. All four forces govern the way our universe works. However, the weak nuclear force is exceptionally difficult to study as it is overshadowed by the much greater effects of the strong nuclear and electromagnetic forces.

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29. Bounding the amount of entanglement from witness operatorsПн, 22 апр[-/+]
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A team of researchers has proposed an approach to quantify entanglement using the standard entanglement witness procedure under three common experimental scenarios. Their work is published in Physical Review Letters.

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30. Springing simulations forward with quantum computingПн, 22 апр[-/+]
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Though "coupled oscillations" may not sound familiar, they are everywhere in nature. The term "coupled harmonic oscillators" describes interacting systems of masses and springs, but their utility in science and engineering does not end there. They describe mechanical systems like bridges, the bonds between atoms, and even gravitational tidal effects between the Earth and the moon. Understanding such problems allows us to probe a correspondingly huge range of systems from chemistry to engineering to materials science and beyond.

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