6759期

最新文章

• Entangling molecules with a tiny motor AI翻译
  作者：Beves, Jonathon
  作者单位：University of New South Wales Sydney
• Comparative connectomics of two distantly related nematode species reveals patterns of nervous system evolution AI翻译
  作者：Cook, Steven J.; Kalinski, Cristine A.; Loer, Curtis M.; Memar, Nadin; Majeed, Maryam; Stephen, Sarah Rebecca; Bumbarger, Daniel J.; Riebesell, Metta; Conradt, Barbara; Schnabel, Ralf; Sommer, Ralf J.; Hobert, Oliver
  作者单位：Columbia University; Howard Hughes Medical Institute; University of San Diego; Braunschweig University of Technology; University of Munich; Allen Institute for Brain Science; Institute for Basic Science - Korea (IBS); University of London; University College London
  摘要：Understanding the evolution of the bilaterian brain requires a detailed exploration of the precise nature of cellular and subcellular differences between related species. We undertook an electron micrographic reconstruction of the brain of the predatory nematode Pristionchus pacificus and compared the results with the brain of Caenorhabditis elegans, which diverged at least 100 million years ago. We revealed changes in neuronal cell death, neuronal cell position, axodendritic projection patter...
• Experiencing the Arctic AI翻译
  作者：Herndon, Jaime
• Negative capacitance overcomes Schottky-gate limits in GaN high-electron-mobility transistors AI翻译
  作者：Khan, Asir Intisar; Kim, Jeong-Kyu; Sikder, Urmita; Das, Koushik; Rodriguez, Thomas; Soman, Rohith; Chowdhury, Srabanti; Salahuddin, Sayeef
  作者单位：University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Stanford University; Stanford University; University of California System; University of California Berkeley
  摘要：For high-electron-mobility transistors based on two-dimensional electron gas (2DEG) within a quantum well-such as those based on AlGaN/GaN heterostructures-a Schottky gate is used to maximize the amount of charge that can be induced and thereby the current that can be achieved. However, the Schottky gate also leads to very high leakage current through the gate electrode. Adding a conventional dielectric layer between the nitride layers and gate metal can reduce leakage; but this comes at the p...
• High-field superconducting halo in UTe2 AI翻译
  作者：Lewin, Sylvia K.; Czajka, Peter; Frank, Corey E.; Saucedo Salas, Gicela; Noe II, G. Timothy; Yoon, Hyeok; Eo, Yun Suk; Paglione, Johnpierre; Nevidomskyy, Andriy H.; Singleton, John; Butch, Nicholas P.
  作者单位：National Institute of Standards & Technology (NIST) - USA; University System of Maryland; University of Maryland College Park; United States Department of Energy (DOE); Los Alamos National Laboratory; Canadian Institute for Advanced Research (CIFAR); Rice University; Rice University; Rice University
  摘要：The heavy fermion material UTe2 is a candidate topological superconductor that exhibits multiple magnetic field-induced superconducting phases. One such phase exists only at fields greater than 40 tesla, a considerable scale given its critical temperature of only 2 K. Here, we extend measurements of this state with fields outside of the bc crystallographic plane and reveal its core structure: The superconducting phase wraps around the b axis in a halo-like fashion and appears to be stabilized ...
• Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator AI翻译
  作者：Chen, Cheng; Emperauger, Gabriel; Bornet, Guillaume; Caleca, Filippo; Gely, Bastien; Bintz, Marcus; Chatterjee, Shubhayu; Liu, Vincent; Barredo, Daniel; Yao, Norman Y.; Lahaye, Thierry; Mezzacapo, Fabio; Roscilde, Tommaso; Browaeys, Antoine
  作者单位：Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); Institut Polytechnique de Paris; Ecole Polytechnique; Universite Paris Cite; Ecole Normale Superieure de Lyon (ENS de LYON); Centre National de la Recherche Scientifique (CNRS); Harvard University; Carnegie Mellon University; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN)
  摘要：The nature and spectrum of elementary excitations are defining features of a many-body system. In this study, we used a Rydberg quantum simulator to demonstrate a form of spectroscopy, called quench spectroscopy, that probes these low-energy excitations. We illustrated the method on a two-dimensional simulation of the spin-1/2 dipolar XY model. Through microscopic measurements of the spatial spin correlation dynamics following a quench, we extracted the dispersion relation of the elementary ex...
• Safeguarding US-China climate cooperation AI翻译
  作者：Dai, Fan
  作者单位：Harvard University; Harvard University
• Governing novel climate interventions in rapidly changing oceans AI翻译
  作者：Morrison, Tiffany H.; Pecl, Gretta; Nash, Kirsty L.; Hughes, Terry; Cohen, Philippa J.; Layton, Cayne; Brown, Katrina; Lovelock, Catherine E.; Lemos, Maria Carmen; Adger, W. Neil; Lawless, Sarah; Muir, Bob; Gurney, Georgina G.; Mcleod, Elizabeth; Mills, Katherine E.; Fairweather-Morrison, Imani; Phillips, Michael; Sullivan, Andrew; Hilmi, Nathalie; Holmes-McHugh, Lucy; Pradhan, Sisir; Streit, Robert; Niles, Navam; Ogier, Emily
  作者单位：University of Melbourne; James Cook University; Wageningen University & Research; University of Tasmania; CGIAR; Worldfish; University of Tasmania; University of Exeter; University of Queensland; University of Michigan System; University of Michigan; Australian Institute of Marine Science; James Cook University; University of Tasmania; Nature Conservancy; Gulf of Maine Research Institute; University of Waterloo
  摘要：Marine systems are rapidly changing in response to global heating. The scale and intensity of change are triggering a host of novel interventions to sustain oceans and ocean-dependent societies. However, the pace of new interventions is outstripping capacity to prevent unintended consequences because governance systems to ensure responsible transformation of marine systems are not yet in place. Responsible transformation entails transitioning marine systems to sustainable, equitable, and adapt...
• The mind of a predatory worm AI翻译
  作者：Ahmed, Maria; Hiesinger, P. Robin
  作者单位：Free University of Berlin
• Acoustic wave modulation of gap plasmon cavities AI翻译
  作者：Selvin, Skyler P.; Esfandyarpour, Majid; Ji, Anqi; Lee, Yan Joe; Yule, Colin; Song, Jung-Hwan; Taghinejad, Mohammad; Brongersma, Mark L.
  作者单位：Stanford University; Stanford University; Stanford University; Stanford University
  摘要：The important role of metallic nanostructures in nanophotonics will expand if ways to electrically manipulate their optical resonances at high speed can be identified. We capitalized on electrically driven surface acoustic waves and the extreme light concentration afforded by gap plasmons to achieve this goal. We placed gold nanoparticles in a particle-on-mirror configuration with a few-nanometer-thick, compressible polymer spacer. Surface acoustic waves were then used to tune light scattering...