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Physics
Scientists develop new model of electric double layer
Credit: CC0 Public Domain The new model takes into account a wide range of ion-electrode interactions and predicts the charge storage capacity of the device. The model’s theoretical predictions are consistent with the experimental results. Data on electric double layer (EDL) behavior can help develop more efficient supercapacitors for portable electronics and electric vehicles. The study was published in ChemPhysChem.…
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Physics
Scientists demonstrate advanced low-coherence BOCDR system using periodic pseudorandom modulation
This figure shows the results of distributed strain sensing over a length of approximately 100 m of optical fiber utilizing BOCDR with periodic pseudorandom modulation. The diagram above shows the structure of the sensing fiber, which includes two tightly wound 47-meter sections and a 10-centimeter taut section near the end. The middle plot shows the distributed Brillouin frequency shift along…
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Physics
A new device for analyzing partial coherence in integrated photonic networks
Generation of multimode partially coherent light by PCLA. Credit: Light: Science & Applications (2024). DOI: 10.1038/s41377-024-01622-y Anyone familiar with optical labs is familiar with the limits of optical coherence. Laser beams are highly coherent and produce well-defined interference patterns that are used in precision applications such as atomic manipulation and precision sensing. In contrast, light from a light source such…
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Physics
Research team succeeds in ultra-fast switching of tiny light source
Intense light pulses in the terahertz range separate the charged, emissive trions into individual electrons and neutral excitons. Credit: Giuseppe Meneghini Ultrathin materials consisting of just a few atomic layers hold promise for applications in electronics and quantum technology. An international team led by the Technical University of Dresden has made remarkable progress in experiments carried out at the Helmholtz…
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Physics
Reverse design approach improves performance and reliability of on-chip spectrometers
(a–c) Example of CSSS using a disordered photonic chip with brute force random selection of structural parameters. (d–g) Spectral reconstructions with four randomly designed spectrometers (S1–S4). Credit: Ang Li et al. In a study published in the journal Engineering, researchers from Nanjing Aerospace University and Zhejiang University pioneer a pioneering approach to on-chip computational spectrometer design that heralds a new…
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Physics
Collision of heavy ions could generate the world’s strongest electric field
Experiments are underway to recreate conditions at the core of neutron stars, such as those discovered by NASA’s Chandra X-ray Observatory and the European Southern Observatory’s Very Large Telescope in Chile. Credit: X-ray (NASA/CXC/ESO/F.Vogt et al). Optics (ESO/VLT/MUSE & NASA/STScI) The world’s strongest electromagnetic fields are also being used in laboratory experiments around the world gearing up to recreate a…
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Physics
Security protocol leverages quantum mechanics to protect data from attackers during cloud-based computing
Optical implementation. Credit: arXiv (2024). DOI: 10.48550/arxiv.2408.05629 Deep learning models are used in a variety of fields, from medical diagnostics to financial forecasting, but they are computationally intensive and require the use of powerful cloud-based servers. Reliance on cloud computing poses significant security risks, especially in sectors such as healthcare, where privacy concerns may make hospitals hesitant to use AI…
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Physics
Miniaturizing augmented reality displays into glasses to expand their uses
Graphical Abstract. Credit: ACS Photonics (2024). DOI: 10.1021/acsphotonics.4c00989 Augmented reality (AR) takes digital images and overlays them on real-world scenes. But AR isn’t just a way to play video games; it could transform surgery and self-driving cars. To make the technology easier to integrate into common personal devices, researchers report in ACS Photonics how they combine two optical technologies into…
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Physics
The research team is investigating the emergence of fluctuating hydrodynamics in chaotic quantum systems.
Fluorescence images of a quantum many-body system of cesium atoms in an optical lattice, with an initially ordered configuration (left) and a random configuration that evolves over time. By studying the growth of fluctuations in this system, we find indications that quantum many-body systems can be macroscopically described by a simple classical theory called fluctuational hydrodynamics (FHD). Courtesy of Julian…
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Physics
Controlling light while measuring trapped ion qubits
AQM characterization scheme. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-50864-2 Quantum information is fragile and often difficult to protect during experiments. Protecting qubits from accidental measurements is essential for performing controlled quantum operations, especially when protocols such as quantum error correction involve measurements or resets that corrupt the state of neighboring qubits. Current methods for protecting atomic qubits from disturbances waste…
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