检索结果-内蒙古大学图书馆

arXiv 2020年

作者： Hu, Pei-Jia Wang, Si-Xian Gao, Xiao-Hui Zhang, Yan-Yang Fang, Tie-Feng Guo, Ai-Min Sun, Qing-Feng Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and Electronics Central South University Changsha410083 China School of Physics and Electronic Engineering Guangzhou University Guangzhou510006 China School of Physical Science and Technology Lanzhou University Lanzhou730000 China International Center for Quantum Materials School of Physics Peking University Beijing100871 China Collaborative Innovation Center of Quantum Matter Beijing100871 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China

The chirality-induced spin selectivity (CISS), demonstrated in diverse chiral molecules by numerous experimental and theoretical groups, has been attracting extensive and ongoing interest in recent years. As the secondary structure of DNA, the charge transfer along DNA hairpins has been widely studied for more than two decades, finding that DNA hairpins exhibit spin-related effects as reported in recent experiments. Here, we propose a setup to demonstrate directly the CISS effect in DNA hairpins contacted by two nonmagnetic leads at both ends of the stem. Our results indicate that DNA hairpins present pronounced CISS effect and the spin polarization could be enhanced by using conducting molecules as the loop. In particular, DNA hairpins show several intriguing features, which are different from other chiral molecules. First, the local spin currents can flow circularly and assemble into a number of vortex clusters when the electron energy locates in the left/right electronic band of the stem. The chirality of vortex clusters in each band is the same and will be reversed by switching the electron energy from the left band to the right one, inducing the sign reversal of the spin polarization. Interestingly, the local spin currents can be greater than the corresponding spin component of the source-drain current. Second, both the conductance and the spin polarization can increase with molecular length as well as dephasing strength, contrary to the physical intuition that the transmission ability of molecular wires should be poorer when suffering from stronger scattering. Third, we unveil the optimal contact configuration of efficient electron transport and that of the CISS effect, which are distinct from each other and can be controlled by dephasing strength. The underlying physical mechanism is illustrated. Copyright © 2020, The Authors. All rights reserved.

关键词： Chirality

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Decays of Majorana or Andreev Oscillations Induced by Steplike Spin-Orbit Coupling

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Physical Review Letters 2019年第14期122卷 147701-147701页

作者： Zhan Cao Hao Zhang Hai-Feng Lü Wan-Xiu He Hai-Zhou Lu X. C. Xie Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen 518055 China School of Physics Southeast University Nanjing 211189 China Peng Cheng Laboratory Shenzhen 518055 China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen 518055 China State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China Beijing Academy of Quantum Information Sciences Beijing 100193 China School of Physics University of Electronic Science and Technology of China Chengdu 610054 China Center for Interdisciplinary Studies and Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Lanzhou 730000 China International Center for Quantum Materials School of Physics Peking University Beijing 100871 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China

The Majorana zero mode in the semiconductor-superconductor nanowire is one of the promising candidates for topological quantum computing. Recently, in islands of nanowires, subgap-state energies have been experimentally observed to oscillate as a function of the magnetic field, showing a signature of overlapped Majorana bound states. However, the oscillation amplitude either dies away after an overshoot or decays, sharply opposite to the theoretically predicted enhanced oscillations for Majorana bound states. We reveal that a steplike distribution of spin-orbit coupling in realistic devices can induce the decaying Majorana oscillations, resulting from the coupling-induced energy repulsion between the quasiparticle spectra on the two sides of the step. This steplike spin-orbit coupling can also lead to decaying oscillations in the spectrum of the Andreev bound states. For Coulomb-blockade peaks mediated by the Majorana bound states, the peak spacings have been predicted to correlate with peak heights by a π/2 phase shift, which was ambiguous in recent experiments and may be explained by the steplike spin-orbit coupling. Our work will inspire more works to reexamine effects of the nonuniform spin-orbit coupling, which is generally present in experimental devices.

关键词： Coulomb blockade Majorana fermions Quantum transport Spin-orbit coupling Topological phases of matter Topological superconductors

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Progress in nuclear astrophysics of east and southeast Asia

arXiv

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arXiv 2021年

作者： Aziz, Azni Abdul Ahmad, Nor Sofiah Ahn, S. Aoki, Wako Bhuyan, Muruthujaya Chen, Ke-Jung Guo, Gang Hahn, K.I. Kajino, Toshitaka Kassim, Hasan Abu Kim, D. Kubono, Shigeru Kusakabe, Motohiko Li, A. Li, Haining Li, Z.H. Liu, W.P. Liu, Z.W. Motobayashi, Tohru Pan, Kuo-Chuan Park, T.-S. Shi, Jian-Rong Tang, Xiaodong Wang, W. Wen, Liangjian Wu, Meng-Ru Yan, Hong-Liang Yusof, Norhasliza Department of Physics Kulliyyah of Science International Islamic University Malaysia Pahang Darul Makmur Kuantan25200 Malaysia Department of Physics University of Malaya Kuala Lumpur50603 Malaysia Daejeon34126 Korea Republic of National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Institute of Astronomy and Astrophysics Academia Sinica Taipei10617 Taiwan Institute of Physics Academia Sinica Taipei11529 Taiwan School of Mathematics and Physics China University of Geosciences Wuhan430074 China Department of Science Education Ewha Womans University Seoul03760 Korea Republic of Graduate School of Science The University of Tokyo Hongo Bunkyo-ku Tokyo11-0033 Japan School of Physics International Research Center for Big-Bang Cosmology and Element Genesis Beihang University Beijing100083 China Daejeon34126 Korea Republic of Center for Nuclear Study University of Tokyo 2-1 Hiroswa Wako Saitama 351-0198 Japan RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan Department of Astronomy Xiamen University XiamenFujian361005 China CAS Key Laboratory of Optical Astronomy National Astronomical Observatories Beijing100101 China China Institute of Atomic Energy Beijing102413 China Yunnan Observatories Chinese Academy of Sciences Kunming650216 China Department of Physics National Tsing Hua University Hsinchu30013 Taiwan Institute of Astronomy National Tsing Hua University Hsinchu30013 Taiwan Center for Informatics and Computation in Astronomy Hsinchu30013 Taiwan Center for informatics and Computation in Astronomy National Tsing Hua University Hsinchu30013 Taiwan School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou730000 China Joint department for nuclear physics Lanzhou University Institute of Modern Physics Chinese Academy of Sciences Lanzhou73000 China School of Physics and Te

Nuclear astrophysics is an interdisciplinary research field of nuclear physics and astrophysics, seeking for the answer to a question, how to understand the evolution of the Universe with the nuclear processes which we learn. We review the research activities of nuclear astrophysics in east and southeast Asia which includes astronomy, experimental and theoretical nuclear physics and astrophysics. Several hot topics such as the Li problems, critical nuclear reactions and properties in stars, properties of dense matter, r-process nucle-osynthesis and v-process nucleosynthesis are chosen and discussed in further details. Some future Asian facilities, together with physics perspectives, are introduced. Copyright © 2021, The Authors. All rights reserved.

关键词： Astrophysics

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Advancing the Landscape of Multimessenger science in the Next Decade

arXiv

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arXiv 2022年

作者： Engel, Kristi Lewis, Tiffany Muzio, Marco Stein Venters, Tonia M. Ahlers, Markus Albert, Andrea Allen, Alice Solares, Hugo Alberto Ayala Anandagoda, Samalka Andersen, Thomas Antier, Sarah Alvarez-Castillo, David Bar, Olaf Beznosko, Dmitri Bibrzyck, Lukasz Brazier, Adam Brisbois, Chad Brose, Robert Brown, Duncan A. Bulla, Mattia Burgess, J. Michael Burns, Eric Chirenti, Cecilia Ciprini, Stefano Clay, Roger Coughlin, Michael W. Cummings, Austin D'Elia, Valerio Dai, Shi Dietrich, Tim Di Lalla, Niccolò Dingus, Brenda Durocher, Mora Eser, Johannes Filipović, Miroslav D. Fleischhack, Henrike Foucart, Francois Frontczak, Michal Fryer, Christopher L. Gamble, Ronald S. Gasparrini, Dario Giardino, Marco Goodman, Jordan Harding, J. Patrick Hare, Jeremy Holley-Bockelmann, Kelly Homola, Piotr Hughes, Kaeli A. Humensky, Brian Inoue, Yoshiyuki Jaffe, Tess Kargaltsev, Oleg Kierans, Carolyn Kneller, James P. Leto, Cristina Lucarelli, Fabrizio Martínez-Huerta, Humberto Maselli, Alessandro Meli, Athina Meyers, Patrick Mueller, Guido Nasipak, Zachary Negro, Michela Nied'zwiecki, Michal Noble, Scott C. Omodei, Nicola Oslowski, Stefan Perri, Matteo Piekarczyk, Marcin Pittori, Carlotta Polenta, Gianluca Prechelt, Remy L. Principe, Giacomo Racusin, Judith Rzecki, Krzysztof Sambruna, Rita M. Schlieder, Joshua E. Shoemaker, David Smale, Alan So'snicki, Tomasz Stein, Robert Stuglik, Slawomir Teuben, Peter Thorpe, James Ira Verbiest, Joris P. Verrecchia, Franceso Vitale, Salvatore Wadiasingh, Zorawar Wibig, Tadeusz Willox, Elijah Wilson-Hodge, Colleen A. Wood, Joshua Yang, Hui Zhang, Haocheng Physics Division Los Alamos National Laboratory Los AlamosNM87545 United States University of Maryland College Park College ParkMD20742 United States NASA Goddard Space Flight Center GreenbeltMD20771 United States Department of Physics Pennsylvania State University State College PA16801 United States Astroparticle Physics Laboratory NASA Goddard Space Flight Center GreenbeltMD20771 United States Niels Bohr International Academy Blegdamsvej 17 Copenhagen2100 Denmark Department of Physics Pennsylvania State University State CollegePA16801 United States Clemson University Department of Physics & Astronomy ClemsonSC29634 United States ARTEMIS UMR 7250 UCA CNRS OCA Boulevard de l'Observatoire CS 34229 Cedex 04 Nice06304 France Institute of Nuclear Physics PAN Cracow31-342 Poland Cornell Center for Astrophysics and Planetary Science Department of Astronomy Cornell University IthacaNY14853 United States Dublin Institute for Advanced Studies Astronomy & Astrophysics Section 31 Fitzwilliam Place Dublin 2D02 XF86 Ireland Department of Physics Syracuse University SyracuseNY13244 United States The Oskar Klein Centre Department of Astronomy Stockholm University AlbaNova StockholmSE-106 91 Sweden Max-Planck Institut fur Extraterrestrische Physik Giessenbachstrasse 1 Garching85740 Germany Louisiana State University Baton RougeLA70803 United States Center for Research and Exploration in Space Science and Technology NASA Goddard Space Flight Center GreenbeltMD20771 United States Center for Mathematics Computation and Cognition UFABC Santo Andr'e SP 09210-580 Brazil Space Science Data Center Italian Space Agency via del Politecnico snc Roma00133 Italy INFN-Sezione di Roma Tor Vergataî Roma00133 Italy University of Minnesota MinneapolisMN55455 United States 1Western Sydney University Locked Bag 1797 PenrithNSW2751 Australia Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Str. 24/25 Potsdam14476 G

The last decade has brought about a profound transformation in multimessenger science. Ten years ago, facilities had been built or were under construction that would eventually discover the nature of objects in our universe could be detected through multiple messengers. Nonetheless, multimessenger science was hardly more than a dream. The rewards for our foresight were finally realized through IceCube's discovery of the diffuse astrophysical neutrino flux, the first observation of gravitational waves by LIGO, and the first joint detections in gravitational waves and photons and in neutrinos and photons. Today we live in the dawn of the multimessenger era. The successes of the multimessenger campaigns of the last decade have pushed multimessenger science to the forefront of priority science areas in both the particle physics and the astrophysics communities. Multimessenger science provides new methods of testing fundamental theories about the nature of matter and energy, particularly in conditions that are not reproducible on Earth. This white paper will present the science and facilities that will provide opportunities for the particle physics community renew its commitment and maintain its leadership in multimessenger science. Copyright © 2022, The Authors. All rights reserved.

关键词： Photons

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Electric field control of disorder-tunable superconductivity and the emergence of quantum metal at an oxide interface

arXiv

引用

arXiv 2020年

作者： Chen, Zheng Liu, Yuan Zhang, Hui Liu, Zhongran Tian, He Sun, Yanqiu Zhang, Meng Zhou, Yi Sun, Jirong Xie, Yanwu Interdisciplinary Center for Quantum Information Zhejiang Province Key Laboratory of Quantum Technology and Device Department of Physics Zhejiang University Hangzhou310027 China Fert Beijing Institute School of Microelectronics BDBC Beihang University Beijing100191 China Center of Electron Microscope State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou310027 China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing100190 China Songshan Lake Materials Laboratory Dongguan Guangdong523808 China Kavli Institute for Theoretical Sciences CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China

We report on an extraordinary field effect of the superconducting LaAlO3/KTaO3(111) interface with Tc ∼2 K. By applying a gate voltage (VG) across KTaO3, the interface can be continuously tuned from superconducting into insulating states, yielding a dome-shaped Tc-VGdependence. The electric gating has only a minor effect on carrier density as evidenced in the Hall-effect measurement, while it changes spatial profile of the carriers in the interface, hence the carrier's disorder level significantly. As temperature is decreased, the resistance saturates at lowest temperature in both superconducting and insulating sides, despite an initial dramatic dropping or increasing, which suggests an emergence of quantum metallic state associated with failed superconductor and/or fragile insulator. A VG-modulation of the magnetic-field-driven superconductor to insulator quantum phase transition reveals a non-universal criticality. Copyright © 2020, The Authors. All rights reserved.

关键词： Interface states

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Observation of two-dimensional superconductivity at the LaAlO3/KTaO3(110) heterointerface

arXiv

引用

arXiv 2020年

作者： Chen, Zheng Liu, Zhongran Sun, Yanqiu Chen, Xiaoxin Liu, Yuan Zhang, Hui Li, Hekang Zhang, Meng Hong, Siyuan Ren, Tianshuang Zhang, Chao Tian, He Zhou, Yi Sun, Jirong Xie, Yanwu Interdisciplinary Center for Quantum Information Zhejiang Province Key Laboratory of Quantum Technology and Device Department of Physics Zhejiang University Hangzhou310027 China Center of Electron Microscope State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou310027 China Beijing National Laboratory for Condensed Matter Physics & Institute of Physics Chinese Academy of Sciences Beijing100190 China Instrumentation and Service Center for Physical Sciences Westlake University Hangzhou310024 China Songshan Lake Materials Laboratory DongguanGuangdong523808 China Kavli Institute for Theoretical Sciences CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China

We report on the observation of a Tc ~0.9 K superconductivity at the interface between LaAlO3 film and the 5d transition-metal oxide KTaO3(110) single crystal. The interface shows a large anisotropy of the upper critical field, and its superconducting transition is consistent with a Berezinskii-Kosterlitz-Thouless transition. Both facts suggest that the superconductivity is two-dimensional (2D) in nature. The carrier density measured at 5 K is ~7 × 1013 cm-2. The superconducting layer thickness and coherence length are estimated to be ~8 and ~30 nm, respectively. Our result provides a new platform for the study of 2D superconductivity at oxide interfaces. Copyright © 2020, The Authors. All rights reserved.

关键词： Transition metals

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Exotic Cooper pairing in multiorbital models of Sr2RuO4

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Physical Review B 2019年第13期100卷 134506-134506页

作者： Wen Huang Yi Zhou Hong Yao Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen 518055 China Institute for Advanced Study Tsinghua University Beijing 100084 China Center for Quantum Computing Peng Cheng Laboratory Shenzhen 518005 China Beijing National Laboratory for Condensed Matter Physics & Institute of Physics Chinese Academy of Sciences Beijing 100190 China Kavli Institute for Theoretical Sciences & CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Low Dimensional Quantum Physics Tsinghua University Beijing 100084 China

The unconventional superconductivity in Sr2RuO4 continues to defy a unified interpretation. In this paper, we focus on some novel aspects of its superconducting pairing by exploiting the orbital degree of freedom in this material. The multiorbital nature, combined with the symmetry of the orbitals involved, leads to a plethora of exotic Cooper pairings not accessible in single-orbital systems. Essential physics is illustrated first using a two-orbital model with dxz and dyz orbitals. We classify the gap functions according to the underlying lattice symmetries, analyze the effective theories of a few representative pairings, and make connections to Sr2RuO4 in the course. In particular, we show how spin-orbit coupling may entangle spin-triplet and spin-singlet pairings. For completeness, the classification is generalized to the three-orbital model involving the dxy orbital as well. The orbital-basis approach distinguishes from the itinerant-band description for Sr2RuO4 and hence offers an alternative perspective to investigate its enigmatic superconducting state.

关键词： Pairing mechanisms Spin-singlet pairing Spin-triplet pairing Superconducting order parameter Superconductivity Topological materials Topological phases of matter Topological superconductors

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Multiple uncertainty relation for accelerated quantum information

arXiv

引用

arXiv 2020年

作者： Qian, Chen Wu, Ya-Dong Xiao, Yunlong Sanders, Barry C. Department of Modern Physics University of Science and Technology of China Hefei230026 China Shanghai Branch National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Shanghai201315 China Qici Quantum Information and Computation Initiative Department of Computer Science University of Hong Kong Pok Fu Lam Road Hong Kong Institute for Quantum Science and Technology University of Calgary CalgaryABT2N 1N4 Canada School of Physical and Mathematical Sciences Nanyang Technological University Singapore639673 Singapore Complexity Institute Nanyang Technological University Singapore639673 Singapore Department of Mathematics and Statistics University of Calgary CalgaryABT2N 1N4 Canada Shanghai Branch Cas Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai201315

The uncertainty principle, first introduced by Heisenberg in inertial frames, clearly distinguishes quantum theories from classical mechanics. In non-inertial frames, its information-theoretic expressions, namely entropic uncertainty relations, have been extensively studied through delocalized quantum fields. However, measurements are infeasible on a delocalized quantum field, as field ex-citations could be created anywhere in spacetime. Building on advances in quantum field theories and theoretical developments in quantum memories, we demonstrate the uncertainty principle in the presence of localized quantum fields inside cavities. Here bounds for entropic uncertainty relations in localized quantum fields are given in terms of the Holevo quantity, which immediately implies how acceleration of agents affects the monogamy of entanglement in tripartite systems. Copyright © 2020, The Authors. All rights reserved.

关键词： Quantum optics

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A study of Galactic Plane Planck Galactic Cold Clumps observed by SCOPE and the JCMT Plane Survey

arXiv

引用

arXiv 2024年

作者： Eden, D.J. Liu, Tie Moore, T.J.T. Di Francesco, J. Fuller, G. Kim, Kee-Tae Li, Di Liu, S.-Y. Plume, R. Tatematsu, Ken'ichi Thompson, M.A. Wu, Y. Bronfman, L. Butner, H.M. Currie, M.J. Garay, G. Goldsmith, P.F. Hirano, N. Johnstone, D. Juvela, M. Lai, S.-P. Lee, C.W. Mannfors, E.E. Olguin, F. Pattle, K. Park, Geumsook Polychroni, D. Rawlings, M. Rigby, A.J. Sanhueza, P. Traficante, A. Urquhart, J.S. Weferling, B. White, G.J. Yadav, R.K. Armagh Observatory and Planetarium College Hill ArmaghBT61 9DB United Kingdom Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Astrophysics Research Institute Liverpool John Moores University Liverpool Science Park iC2 146 Brownlow Hill. LiverpoolL3 5RF United Kingdom NRC Herzberg Astronomy and Astrophysics 5071 West Saanich Rd VictoriaBCV9E 2E7 Canada Department of Physics and Astronomy University of Victoria VictoriaBCV8W 2Y2 Canada Jodrell Bank Centre for Astrophysics School of Physics and Astronomy The University of Manchester Oxford Road ManchesterM13 9PL United Kingdom Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejon34055 Korea Republic of 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China Key Laboratory of Radio Astronomy Chinese Academy of Science Nanjing210008 China Academia Sinica Institute of Astronomy and Astrophysics 11F of AS/NTU Astronomy-Mathematics Building No.1 Sec. 4 Roosevelt Rd Taipei10617 Taiwan Department of Physics and Astronomy University of Calgary 2500 University Drive NW CalgaryABT2N 1N4 Canada Nobeyama Radio Observatory National Astronomical Observatory of Japan National Institutes of Natural Sciences Nobeyama Minamimaki Minamisaku Nagano384-1305 Japan Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan School of Physics and Astronomy University of Leeds LeedsLS2 9JT United Kingdom Department of Astronomy Peking University Beijing100871 China Astronomy Department Universidad de Chile Casilla 36-D Santiago Chile Department of Physics and Astronomy James Madison University MSC 4502 901 Carrier Drive HarrisonburgVA22807 United States RAL Space STFC Rutherford Appleton Laboratory Chilton Didcot OxfordshireOX11 0QX United Kingdom East Asian Observatory

We have investigated the physical properties of Planck Galactic Cold Clumps (PGCCs) located in the Galactic Plane, using the JCMT Plane Survey (JPS) and the SCUBA-2 Continuum Observations of Pre-protostellar Evolution (SCOPE) survey. By utilising a suite of molecular-line surveys, velocities and distances were assigned to the compact sources within the PGCCs, placing them in a Galactic context. The properties of these compact sources show no large-scale variations with Galactic environment. Investigating the star-forming content of the sample, we find that the luminosity-to-mass ratio (L/M) is an order of magnitude lower than in other Galactic studies, indicating that these objects are hosting lower levels of star formation. Finally, by comparing ATLASGAL sources that are associated or are not associated with PGCCs, we find that those associated with PGCCs are typically colder, denser, and have a lower L/M ratio, hinting that PGCCs are a distinct population of Galactic Plane sources. Copyright © 2024, The Authors. All rights reserved.

关键词： Stars

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Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI

arXiv

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arXiv 2023年

作者： Zsíros, Szanna Szalai, Tamás De Looze, Ilse Sarangi, Arkaprabha Shahbandeh, Melissa Fox, Ori D. Temim, Tea Milisavljevic, Dan Van Dyk, Schuyler D. Smith, Nathan Filippenko, Alexei V. Brink, Thomas G. Zheng, WeiKang Dessart, Luc Jencson, Jacob Johansson, Joel Pierel, Justin Rest, Armin Tinyanont, Samaporn Niculescu-Duvaz, Maria Barlow, M.J. Wesson, Roger Andrews, Jennifer Clayton, Geoff De, Kishalay Dwek, Eli Engesser, Michael Foley, Ryan J. Gezari, Suvi Gomez, Sebastian Gonzaga, Shireen Kasliwal, Mansi Lau, Ryan Marston, Anthony O’Steen, Richard Siebert, Matthew Skrutskie, Michael Strolger, Lou Wang, Qinan Williams, Brian Williams, Robert Xiao, Lin Department of Experimental Physics Institute of Physics University of Szeged Dóm tér 9 SzegedH-6720 Hungary HUN-REN–SZTE Stellar Astrophysics Research Group Szegedi út Kt. 766 BajaH-6500 Hungary Sterrenkundig Observatorium Ghent University Krijgslaan 281 – S9 Gent9000 Belgium DARK Niels Bohr Institute University of Copenhagen Jagtvej 128 Copenhagen2200 Denmark Department of Physics and Astronomy Johns Hopkins University BaltimoreMD21218 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Purdue University Department of Physics and Astronomy 525 Northwestern Ave West LafayetteIN47907 United States Integrative Data Science Initiative Purdue University West LafayetteIN47907 United States Caltech/IPAC Mailcode 100-22 PasadenaCA91125 United States Steward Observatory University of Arizona 933 N. Cherry St TucsonAZ85721 United States Department of Astronomy University of California BerkeleyCA94720-3411 United States Institut d’Astrophysique de Paris CNRS–Sorbonne Université 98 bis boulevard Arago ParisF-75014 France Oskar Klein Centre Department of Physics Stockholm University AlbaNova StockholmSE-10691 Sweden Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States National Astronomical Research Institute of Thailand 260 Moo 4 Donkaew Maerim Chiang Mai50180 Thailand Department of Physics & Astronomy University College London Gower St LondonWC1E 6BT United Kingdom School of Physics and Astronomy Cardiff University Queen’s Buildings The Parade CardiffCF24 3AA United Kingdom Gemini Observatory 670 N. Aohoku Place HiloHI96720 United States Physics & Astronomy Louisiana State University Baton RougeLA United States MIT-Kavli Institute for Astrophysics and Space Research 77 Massachusetts Ave. CambridgeMA02139 United States Observational Cos

We present mid-infrared (mid-IR) imaging of the Type IIL supernova (SN) 1980K with the James Webb Space Telescope (JWST) more than 40 yr post-explosion. SN 1980K, located in the nearby (D ≈ 7 Mpc) "SN factory" galaxy NGC 6946, was serendipitously captured in JWST/MIRI images taken of the field of SN 2004et in the same galaxy. SN 1980K serves as a promising candidate for studying the transitional phase between young SNe and older SN remnants and also provides a great opportunity to investigate its the close environment. SN 1980K can be identified as a clear and bright point source in all eight MIRI filters from F560W up to F2550W. We fit analytical dust models to the mid-IR spectral energy distribution that reveal a large amount (Md ≈ 0.002 M☉) of Si-dominated dust at Tdust ≈ 150 K (accompanied by a hotter dust/gas component), and also computed numerical SED dust models. Radiative transfer modeling of a late-time optical spectrum obtained recently with Keck discloses that an even larger (∼ 0.24 − 0.58 M☉) amount of dust is needed in order for selective extinction to explain the asymmetric line profile shapes observed in SN 1980K. As a conclusion, with JWST, we may see i) pre-existing circumstellar dust heated collisionally (or, partly radiatively), analogous to the equatorial ring of SN 1987A, or ii) the mid-IR component of the presumed newly-formed dust, accompanied by much more colder dust present in the ejecta (as suggested by the late-time the optical spectra). Copyright © 2023, The Authors. All rights reserved.

关键词： Supernovae

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