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arXiv 2023年

作者： Zhou, J.W. Dib, S. Wyrowski, F. Liu, T. Li, S.H. Sanhueza, P. Juvela, M. Xu, F.W. Liu, H.L. Baug, T. Peng, Y.P. Menten, K.M. Bronfman, L. Lee, C.W. Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 Bonn53121 Germany Max Planck Institute for Astronomy Königstuhl 17 Heidelberg69117 Germany Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Department of Physics University of Helsinki P.O.Box 64 FI-00014 Finland Kavli Institute for Astronomy and Astrophysics Peking University Haidian District Beijing100871 China Department of Astronomy School of Physics Peking University Beijing100871 China Department of Astronomy Yunnan University Kunming650091 China Department of Physics Faculty of Science Kunming University of Science and Technology Kunming650500 China National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Departamento de Astronomía Universidad de Chile Casilla 36-D Santiago Chile Satyendra Nath Bose National Centre for Basic Sciences BlockJD Sector-III Salt Lake Kolkata700 106 India Korea Astronomy and Space Science Institute 776 Daedeokdaero Yuseonggu Daejeon34055 Korea Republic of 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan

A total of 64 ATOMS sources at different evolutionary stages were selected to investigate the kinematics and dynamics of gas structures under feedback. We identified dense gas structures based on the integrated intensity map of H13CO+ J=1-0 emission, and then extracted the average spectra of all structures to investigate their velocity components and gas kinematics. For the scaling relations between velocity dispersion σ, effective radius R and column density N of all structures, σ − N ∗ R always has a stronger correlation compared to σ − N and σ − R. There are significant correlations between velocity dispersion and column density, which may imply that the velocity dispersion originates from gravitational collapse, also revealed by the velocity gradients. The measured velocity gradients for dense gas structures in early-stage sources and late-stage sources are comparable, indicating gravitational collapse through all evolutionary stages. Late-stage sources do not have large-scale hub-filament structures, but the embedded dense gas structures in late-stage sources show similar kinematic modes to those in early- and middle-stage sources. These results may be explained by the multi-scale hub-filament structures in the clouds. We quantitatively estimated the velocity dispersion generated by the outflows, inflows, ionized gas pressure and radiation pressure, and found that the ionized gas feedback is stronger than other feedback mechanisms. However, although feedback from Hii regions is the strongest, it does not significantly affect the physical properties of the embedded dense gas structures. Combining with the conclusions in Zhou et al. (2023a) on cloud-clump scales, we suggest that although feedback from cloud to core scales will break up the original cloud complex, the substructures of the original complex can be reorganized into new gravitationally governed configurations around new gravitational centers. This process is accompanied by structural destruction and g

关键词： Gases

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Excitation of absorbing exceptional points in the time domain

arXiv

引用

arXiv 2022年

作者： Farhi, Asaf Mekawy, Ahmed Alù, Andrea Stone, Douglas Department of Applied Physics Yale University New HavenCT06520 United States Yale Quantum Institute Yale University New HavenCT06520 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical Engineering City College of The City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10016 United States

We analyze the time-domain dynamics of resonators supporting exceptional points (EPs), at which both the eigenfrequencies and the eigenmodes associated with perfect capture of an input wave coalesce. We find that a time-domain signature of the EP is an expansion of the class of waveforms which can be perfectly captured. We show that such resonators have improved performance for storage or transduction of energy. They also can be used to convert between waveforms within this class. We analytically derive these features and demonstrate them for several examples of coupled optical resonator systems. Copyright © 2022, The Authors. All rights reserved.

关键词： Resonators

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The TESS-Keck Survey XX: 15 New TESS Planets and a Uniform RV Analysis of all Survey Targets

arXiv

引用

arXiv 2024年

作者： Polanski, Alex S. Lubin, Jack Beard, Corey Akana Murphy, Joseph M. Rubenzahl, Ryan Hill, Michelle L. Crossfield, Ian J.M. Chontos, Ashley Robertson, Paul Isaacson, Howard Kane, Stephen R. Ciardi, David R. Batalha, Natalie M. Dressing, Courtney Fulton, Benjamin Howard, Andrew W. Huber, Daniel Petigura, Erik A. Weiss, Lauren M. Angelo, Isabel Behmard, Aida Blunt, Sarah Brinkman, Casey L. Dai, Fei Dalba, Paul A. Fetherolf, Tara Giacalone, Steven Hirsch, Lea A. Holcomb, Rae Kosiarek, Molly R. Mayo, Andrew W. MacDougall, Mason G. Močnik, Teo Pidhorodetska, Daria Rice, Malena Rosenthal, Lee J. Scarsdale, Nicholas Turtelboom, Emma V. Tyler, Dakotah Van Zandt, Judah Yee, Samuel W. Coria, David R. Dulz, Shannon D. Hartman, Joel D. Householder, Aaron Lange, Sarah Langford, Andrew Louden, Emma M. Siegel, Jared C. Gilbert, Emily A. Gonzales, Erica J. Schlieder, Joshua E. Boyle, Andrew W. Christiansen, Jessie L. Clark, Catherine A. Fernandes, Rachel B. Lund, Michael B. Savel, Arjun B. Gill, Holden Beichman, Charles Matson, Rachel Matthews, Elisabeth C. Furlan, E. Howell, Steve B. Scott, Nicholas J. Everett, Mark E. Livingston, John H. Ershova, Irina O. Cheryasov, Dmitry V. Safonov, Boris Lillo-Box, Jorge Barrado, David Morales-Calderón, María Department of Physics and Astronomy University of Kansas LawrenceKS66045 United States Department of Physics and Astronomy University of California IrvineCA92697 United States Department of Physics & Astronomy University of California Los Angeles Los AngelesCA90095 United States Department of Astronomy and Astrophysics University of California Santa CruzCA95060 United States Department of Astronomy California Institute of Technology PasadenaCA91125 United States Department of Earth and Planetary Sciences University of California RiversideCA92521 United States Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08540 United States Institute for Astronomy University of Hawai‘i 2680 Woodlawn Drive HonoluluHI96822 United States Department of Astronomy University of California Berkeley BerkeleyCA94720 United States Centre for Astrophysics University of Southern Queensland ToowoombaQLD Australia NASA Exoplanet Science Institute Caltech-IPAC 1200 E. California Blvd. PasadenaCA91125 United States School of Physics University of Sydney NSW2006 Australia Department of Physics and Astronomy University of Notre Dame Notre DameIN46556 United States Department of Physics and Astronomy University of California Los AngelesCA90095 United States Mani L. Bhaumik Institute for Theoretical Physics University of California Los AngelesCA90095 United States Department of Astrophysics American Museum of Natural History 200 Central Park West ManhattanNY10024 United States CIERA Northwestern University EvanstonIL60201 United States Institute for Astronomy University of Hawai’i HonoluluHI96822 United States Division of Geological and Planetary Science California Institute of Technology PasadenaCA91125 United States NASA Sagan Fellow Department of Physics California State University San MarcosCA92096 United States University of Toronto Mississauga 3359 Mississauga Road MississaugaONL5L 1C6 Canada Department

The Transiting Exoplanet Survey Satellite (TESS) has discovered hundreds of new worlds, with TESS planet candidates now outnumbering the total number of confirmed planets from Kepler. Owing to differences in survey design, TESS continues to provide planets that are better suited for subsequent follow-up studies, including mass measurement through radial velocity (RV) observations, compared to Kepler targets. In this work, we present the TESS-Keck Survey’s (TKS) Mass Catalog: a uniform analysis of all TKS RV survey data which has resulted in mass constraints for 126 planets and candidate signals. This includes 58 mass measurements that have reached ≥ 5σ precision. We confirm or validate 32 new planets from the TESS mission either by significant mass measurement (15) or statistical validation (17), and we find no evidence of likely false positives among our entire sample. This work also serves as a data release for all previously unpublished TKS survey data, including 9,204 RV measurements and associated activity indicators over our three year survey. We took the opportunity to assess the performance of our survey, and found that we achieved many of our goals including measuring the mass of 38 small ( © 2024, CC BY.

关键词： Satellites

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Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen

arXiv

引用

arXiv 2022年

作者： Abe, S. Asami, S. Eizuka, M. Futagi, S. Gando, A. Gando, Y. Gima, T. Goto, A. Hachiya, T. Hata, K. Hayashida, S. Hosokawa, K. Ichimura, K. Ieki, S. Ikeda, H. Inoue, K. Ishidoshiro, K. Kamei, Y. Kawada, N. Kishimoto, Y. Koga, M. Kurasawa, M. Maemura, N. Mitsui, T. Miyake, H. Nakahata, T. Nakamura, K. Nakamura, K. Nakamura, R. Ozaki, H. Sakai, T. Sambonsugi, H. Shimizu, I. Shirai, J. Shiraishi, K. Suzuki, A. Suzuki, Y. Takeuchi, A. Tamae, K. Ueshima, K. Watanabe, H. Yoshida, Y. Obara, S. Ichikawa, A.K. Chernyak, D. Kozlov, A. Nakamura, K.Z. Yoshida, S. Takemoto, Y. Umehara, S. Fushimi, K. Kotera, K. Urano, Y. Berger, B.E. Fujikawa, B.K. Learned, J.G. Maricic, J. Axani, S.N. Smolsky, J. Fu, Z. Winslow, L.A. Efremenko, Y. Karwowski, H.J. Markoff, D.M. Tornow, W. Dell'Oro, S. O'Donnell, T. Detwiler, J.A. Enomoto, S. Decowski, M.P. Grant, C. Li, A. Song, H. Research Center for Neutrino Science Tohoku University Sendai980-8578 Japan The University of Tokyo Institutes for Advanced Study The University of Tokyo Chiba Kashiwa277-8583 Japan Graduate Program on Physics for the Universe Tohoku University Sendai980-8578 Japan Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai980-8578 Japan Department of Physics Tohoku University Sendai980-8578 Japan Kyoto University Department of Physics Kyoto606-8502 Japan Graduate School of Science Osaka University Osaka Toyonaka560-0043 Japan Research Center for Nuclear Physics Osaka University Osaka Ibaraki567-0047 Japan Department of Physics Tokushima University Tokushima770-8506 Japan Graduate School of Integrated Arts and Sciences Tokushima University Tokushima770-8502 Japan Nuclear Science Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Physics and Astronomy University of Hawaii at Manoa HonoluluHI96822 United States Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States Triangle Universities Nuclear Laboratory DurhamNC27708 United States Physics Departments Duke University DurhamNC27708 United States North Carolina Central University DurhamNC27707 United States The University of North Carolina at Chapel Hill Chapel HillNC27599 United States Center for Neutrino Physics Virginia Polytechnic Institute State University BlacksburgVA24061 United States Center for Experimental Nuclear Physics and Astrophysics University of Washington SeattleWA98195 United States Nikhef The University of Amsterdam Science Park Amsterdam Netherlands Boston University BostonMA02215 United States

The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in 136Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultralow radioactivity container, corresponding to an exposure of 970 kg yr of 136Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and have required the use of novel background rejection techniques. We obtain a lower limit for the 0νββ decay half-life of T 0ν1/2 > 2.3 ×1026 yr at 90% C.L., corresponding to upper limits on the effective Majorana neutrino mass of 36-156 meV using commonly adopted nuclear matrix element calculations. © 2022, CC BY.

关键词： Radioactivity

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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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In- vitro biosynthesis of concentration-induced nickel oxide nanoparticles for antibacterial applications

Hybrid Advances

引用

Hybrid Advances 2023年 3卷

作者： Akpojevwa, Tega N. Aisida, Samson O. Uzoeto, Henrietta O. Ahmad, Ishaq Ezema, Fabian I. Department of Physics and Astronomy University of Nigeria Nsukka Nigeria National Centre for Physics Quaid-i-Azam University Campus Islamabad 44000 Pakistan Nanosciences African Network (NANOAFNET) iThemba LABS-National Research South Africa UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology College of Graduate Studies University of South Africa (UNISA) Muckleneuk Ridge P.O. Box 392 Pretoria South Africa NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering Northwestern Polytechnical University Xi'an 710072 China Department of Applied Sciences and Dental Therapy Federal College of Dental Technology and Therapy Enugu Nigeria

Biosynthesis of NiO nanoparticles (NiONPs) using Gongronema Latifolium (GL) as a potential reducing agent for antibacterial applications is emplaced in this work. X-ray diffractometer (XRD) analysis confirmed the face-centered cubic of the prepared GL_NiONPs, the scanning electron microscopy (SEM) images showed the spherical image of the sample. Fourier transforms infrared (FTIR) spectroscopy shows the functional group responsible for the reduction processes and UV–visible spectroscopy shows the absorbance potency within the visible range. The antibacterial activity of the samples was carried out on staphylococci aureus and coliform (bacilli) bacteria strains. The results showed reduced cell growth of the bacteria strains and improved the antibacterial activities, especially in the staphylococci aureus strain, which had the highest zone of inhibition. Hence, the formulated sample can serve as a potential antibacterial agent. © 2023 The Authors

关键词： Antibacterial analysis Gongronema latifolium Green synthesis Nanoparticles

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Higher-order topological phase induced by hybrid magneto-electric resonances

arXiv

引用

arXiv 2021年

作者： Bobylev, Daniel A. Zhirihin, Dmitry V. Tihonenko, Dmitry I. Vakulenko, Anton Smirnova, Daria A. Khanikaev, Alexander B. Gorlach, Maxim A. School of Physics and Engineering ITMO University Saint Petersburg Russia Department of Electrical Engineering Grove School of Engineering City College of the City University of New York New YorkNY United States Physics Program Graduate Center of the City University of New York New YorkNY United States Research School of Physics Australian National University CanberraACT Australia Institute of Applied Physics Russian Academy of Science Nizhny Novgorod Russia

Rapid development of topological concepts in photonics unveils exotic phenomena such as unidirectional propagation of electromagnetic waves resilient to backscattering at sharp bends and disorder-immune localization of light at stable frequencies [1, 2]. Recently introduced higher-order topological insulators (HOTIs) [3, 4] bring in additional degrees of control over light confinement and steering. However, designs of photonic HOTIs reported so far are solely exploiting lattice geometries which are hard to reconfigure thus limiting tunability. Here, we elaborate a conceptually new mechanism to engineer higher-order topological phases which relies on the dual nature of electromagnetic field and exploits both electric and magnetic responses of the meta-atoms. Hybridization between these responses gives rise to the difference in the effective coupling which is controlled by the meta-atoms mutual orientations. This feature facilitates us to tailor photonic band topology exclusively via particle alignment and to flexibly reconfigure the topological phase. Focusing on the kagome array of split-ring resonators, we experimentally demonstrate topological edge and corner states in the microwave domain. Our findings provide a new promising route to induce and control higher-order topological phases and states. Copyright © 2021, The Authors. All rights reserved.

关键词： Metamaterials

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Polar state memory in active fluids

arXiv

引用

arXiv 2021年

作者： Zhang, Bo Yuan, Hang Sokolov, Andrey De La Cruz, Monica Olvera Snezhko, Alexey Materials Science Division Argonne National Laboratory 9700 South Cass Avenue ArgonneIL60439 United States Applied Physics Graduate Program Northwestern University 2145 Sheridan Road EvanstonIL60208 United States Department of Materials Science and Engineering Northwestern University 2220 Campus Drive EvanstonIL60208 United States Department of Physics and Astronomy Northwestern University 2145 Sheridan Road EvanstonIL60208 United States

Spontaneous emergence of correlated states such as flocks and vortices are prime examples of remarkable collective dynamics and self-organization observed in active matter [1–6]. The formation of globally correlated polar states in geometrically confined systems proceeds through the emergence of a macroscopic steadily rotating vortex that spontaneously selects a clockwise or counterclockwise global chiral state [7, 8]. Here, we reveal that a global vortex formed by colloidal rollers exhibits state memory. The information remains stored even when the energy injection is ceased and the activity is terminated. We show that a subsequent formation of the collective states upon re-energizing the system is not random. We combine experiments and simulations to elucidate how a combination of hydrodynamic and electrostatic interactions leads to hidden asymmetries in the local particle positional order encoding the chiral state of the system. The stored information can be accessed and exploited to systematically command subsequent polar states of active liquid through temporal control of the activity. With the chirality of the emergent collective states controlled on-demand, active liquids offer new possibilities for flow manipulation, transport, and mixing at the microscale. Copyright © 2021, The Authors. All rights reserved.

关键词： Vortex flow

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Unveiling the Cosmic Gems Arc at z ∼ 10.2 with JWST

arXiv

引用

arXiv 2024年

作者： Bradley, Larry D. Adamo, Angela Vanzella, Eros Sharon, Keren Brammer, Gabriel Coe, Dan Diego, Jose M. Kokorev, Vasily Mahler, Guillaume Oguri, Masamune Abdurro'uf Bhatawdekar, Rachana Christensen, Lise Fujimoto, Seiji Hashimoto, Takuya Hsiao, Tiger Y.-Y. Inoue, Akio K. Jiménez-Teja, Yolanda Messa, Matteo Norman, Colin Ricotti, Massimo Tamura, Yoichi Windhorst, Rogier A. Xu, Xinfeng Zitrin, Adi 3700 San Martin Drive BaltimoreMD21218 United States The Oskar Klein Centre Department of Astronomy Stockholm University AlbaNova StockholmSE-106 91 Sweden INAF-OAS Osservatorio di Astrofisica e Scienza dello Spazio di Bologna via Gobetti 93/3 BolognaI-40129 Italy Department of Astronomy University of Michigan 1085 S. University Ave Ann ArborMI48109 United States Copenhagen Denmark Niels Bohr Institute University of Copenhagen Jagtvej 128 CopenhagenDK-2200 N Denmark STScI BaltimoreMD United States Center for Astrophysical Sciences Department of Physics and Astronomy The Johns Hopkins University 3400 N Charles St. BaltimoreMD21218 United States Avda. Los Castros s/n. Santander39005 Spain Kapteyn Astronomical Institute University of Groningen P.O. Box 800 Groningen9700AV Netherlands Institute for Computational Cosmology Durham University South Road DurhamDH1 3LE United Kingdom Centre for Extragalactic Astronomy Durham University South Road DurhamDH1 3LE United Kingdom STAR Institute Quartier Agora - Allée du six Août 19c LiègeB-4000 Belgium Center for Frontier Science Chiba University 1-33 Yayoi-cho Inage-ku Chiba263-8522 Japan Department of Physics Graduate School of Science Chiba University 1-33 Yayoi-Cho Inage-Ku Chiba263-8522 Japan Camino Bajo del Castillo s/n Villanueva de la Cañada Madrid28692 Spain Department of Astronomy The University of Texas at Austin AustinTX78712 United States Graduate School of Pure and Applied Sciences University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8571 Japan Tomonaga Center for the History of the Universe University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8571 Japan Department of Physics School of Advanced Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo

We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615−5746. The 5′′-long arc is the most highly magnified z > 10 galaxy known, straddling the lensing critical curve and revealing five star clusters with radii ∼ 1 pc or less. We measure the full arc to have F200W 24.5 AB mag, consisting of two mirror images, each 25.3 AB mag with a magnification µ ∼ 60 (delensed 29.7 AB mag, MUV = −17.8). The galaxy has an extremely strong Lyman break F115W−F200W > 3.2 mag (2σ lower limit), is undetected in all bluer filters (phot = 10.2 ± 0.2 (95% confidence) with no significant likelihood below z ∗ ∼ 2.4 − 5.6 × 107M☉, young mass-weighted age of ∼ 21 − 79 Myr, low dust content (AV ☉. We identify a fainter third counterimage candidate within 2′′. 2 of the predicted position, lensed to AB mag 28.4 and magnified by µ ∼ 2, suggesting the fold arc may only show ∼ 60% of the galaxy. SPT0615-JD is a unique laboratory to study star clusters observed within a galaxy just 460 Myr after the Big Bang. © 2024, CC BY.

关键词： Galaxies

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Dynamics of one-dimensional spin models via complex-time evolution of tensor networks

arXiv

引用

arXiv 2025年

作者： Cha, Jeong Hyeok Lee, Hyun-Yong Kim, Heung-Sik Department of Semiconductor Physics Kangwon National University Chuncheon24341 Korea Republic of Interdisciplinary Program in Earth Environmental System Science and Engineering Kangwon National University Chuncheon24341 Korea Republic of Division of Semiconductor Physics Korea University Sejong30019 Korea Republic of Department of Applied Physics Graduate School Korea University Sejong30019 Korea Republic of Institute of Quantum Convergence Technology Kangwon National University Chuncheon24341 Korea Republic of

Studying the real-time dynamics of strongly correlated systems poses significant challenges, which have recently become more manageable thanks to advances in density matrix renormalization group (DMRG) and tensor network methods. A notable development in this area is the introduction of a complex-time evolution scheme for tensor network states, originally suggested for solving Anderson impurity model and designed to suppress the growth of entanglement under time evolution. In this study, we employ the complex-time evolution scheme to investigate the dynamics of one-dimensional spin systems, specifically the transverse-field Ising model (TFIM) and the XXZ model. Our analysis revisits the dynamic critical exponent z of the TFIM and explores the dynamical structure factor in both gapped and gapless states of the XXZ model. Importantly, the complex-time evolution reproduces the results of real-time evolution while mitigating the rapid growth of quantum entanglement typically associated with the latter. These results demonstrate that the combination of complex-time evolution and extrapolation provides a robust and efficient framework for studying the dynamics of complex quantum systems, enabling more comprehensive insights into their behavior. © 2025, CC BY.

关键词： Quantum entanglement

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