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38th International Symposium on Lattice Field Theory, LATTICE 2021

作者： Alexandrou, C. Bacchio, S. Bergner, G. Constantinou, M. di Carlo, M. dimopoulos, P. Finkenrath, J. Fiorenza, E. Frezzotti, r. Garofalo, M. Hadjiyiannakou, K. Kostrzewa, B. Koutsou, G. Jansen, K. Lubicz, V. Mangin-Brinet, M. Manigrasso, F. Martinelli, G. Pittler, F. rossi, G.C. Sanfilippo, F. Simula, S. Tarantino, C. Todaro, A. Urbach, C. Wenger, U. Department of Physics University of Cyprus Nicosia20537 Cyprus Computation-Based Science and Technology Research Center The Cyprus Institute Cyprus University of Jena Institute for Theoretical Physics Max-Wien-Platz 1 JenaD-07743 Germany Department of Physics Temple University PhiladelphiaPA19122-1801 United States School of Physics and Astronomy The University of Edinburgh EdinburghEH9 3FD United Kingdom Istituto Nazionale di Fisica Nucleare Sezione di Roma La Sapienza Italy Dipartimento di Scienze Matematiche Fisiche e Informatiche Università di Parma INFN Italy CP3-Origins University of Southern Denmark Campusvej 55 Odense5230 Denmark Dipartimento di Fisica INFN Università di Roma "Tor Vergata" RomeI-00133 Italy Rheinische Friedrich-Wilhelms-Universität Bonn Germany High Performance Computing and Analytics Lab Rheinische Friedrich-Wilhelms-Universität Bonn Germany NIC DESY Platanenallee 6 ZeuthenD-15738 Germany Dipartimento di Matematica e Fisica Università Roma Tre INFN Sezione di Roma Tre Italy Theory Group Laboratoire de Physique Subatomique et de Cosmologie Grenoble France Institut für Physik Humboldt-Universität zu Berlin Newtonstrasse 15 Berlin12489 Germany Dipartimento di Fisica INFN Università di Roma "La Sapienza" RomeI-00185 Italy Centro Fermi Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi" Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tre Italy Institute for Theoretical Physics Albert Einstein Center for Fundamental Physics Switzerland

We present results for the light, strange and charm quark masses using Nf = 2 + 1 + 1 twisted mass fermion ensembles at three values of the lattice spacing, including two ensembles simulated with the physical value of the pion mass. The analysis is done both in the meson and baryon sectors. The difference in the mean values found in the two sectors is included as part of the systematic error. The presentation is based on the work of ref. [1], where more details can be found. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-Noderivatives 4.0 International License (CC BY-NC-Nd 4.0)

关键词： Lattice theory

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Search for Continuous Gravitational Waves from Known Pulsars in the First Part of the Fourth LIGO-Virgo-KAGrA Observing run

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Astrophysical Journal 2025年第2期983卷 99-99页

作者： Abac, A.G. Abbott, r. Abouelfettouh, I. Acernese, F. Ackley, K. Adhicary, S. Adhikari, N. Adhikari, r.X. Adkins, V.K. Agarwal, d. Agathos, M. Aghaei Abchouyeh, M. Aguiar, O.d. Aguilar, I. Aiello, L. Ain, A. Ajith, P. Akutsu, T. Albanesi, S. Alfaidi, r.A. Al-Jodah, A. Alléné, C. Allocca, A. Al-Shammari, S. Altin, P.A. Alvarez-Lopez, S. Amato, A. Amez-droz, L. Amorosi, A. Amra, C. Ananyeva, A. Anderson, S.B. Anderson, W.G. Andia, M. Ando, M. Andrade, T. Andres, N. Andrés-Carcasona, M. Andrić, T. Anglin, J. Ansoldi, S. Antelis, J.M. Antier, S. Aoumi, M. Appavuravther, E.Z. Appert, S. Apple, S.K. Arai, K. Araya, A. Araya, M.C. Areeda, J.S. Argianas, L. Aritomi, N. Armato, F. Arnaud, N. Arogeti, M. Aronson, S.M. Ashton, G. Aso, Y. Assiduo, M. Assis de Souza Melo, S. Aston, S.M. Astone, P. Attadio, F. Aubin, F. AultONeal, K. Avallone, G. Babak, S. Badaracco, F. Badger, C. Bae, S. Bagnasco, S. Bagui, E. Baier, J.G. Baiotti, L. Bajpai, r. Baka, T. Ball, M. Ballardin, G. Ballmer, S.W. Banagiri, S. Banerjee, B. Bankar, d. Baral, P. Barayoga, J.C. Barish, B.C. Barker, d. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, d. Bartoletti, A.M. Barton, M.A. Bartos, I. Basak, S. Basalaev, A. Bassiri, r. Basti, A. Bates, d.E. Bawaj, M. Baxi, P. Bayley, J.C. Baylor, A.C. Baynard, P.A. Bazzan, M. Bedakihale, V.M. Beirnaert, F. Bejger, M. Belardinelli, d. Bell, A.S. Benedetto, V. Benoit, W. Bentley, J.d. Ben Yaala, M. Bera, S. Berbel, M. Bergamin, F. Berger, B.K. Bernuzzi, S. Beroiz, M. Bersanetti, d. Bertolini, A. Betzwieser, J. Beveridge, d. Bevins, N. Bhandare, r. Bhardwaj, U. Bhatt, r. Bhattacharjee, d. Bhaumik, S. Bhowmick, S. Bianchi, A. Bilenko, I.A. Billingsley, G. Binetti, A. Bini, S. Birnholtz, O. Biscoveanu, S. Bisht, A. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blagg, L.A. Blair, C.d. Blair, d.G. Bobba, F. Bode, N. Boileau, G. Boldrini, M. Bolingbroke, G.N. Bolliand, A. Bonavena, L.d. Bondarescu, r. Bondu, F. Bonilla, E. Bonilla, M.S. Bonino, A. Bonnand, r. Booker, P. Borchers, A. Boschi, V. Bose, S. Boss Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Potsdam D-14476 Germany LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States LIGO Hanford Observatory Richland 99352 WA United States Dipartimento di Farmacia Università di Salerno Fisciano Salerno I-84084 Italy INFN Sezione di Napoli Napoli I-80126 Italy University of Warwick Coventry CV 47AL United Kingdom The Pennsylvania State University University Park 16802 PA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States Louisiana State University Baton Rouge 70803 LA United States Université Catholique de Louvain Louvain-la-Neuve B-1348 Belgium Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Queen Mary University of London London E1 4NS United Kingdom Department of Physics and Astronomy Sejong University 209 Neungdong-ro Gwangjin-gu Seoul 143-747 South Korea Instituto Nacional de Pesquisas Espaciais São José dos Campos São Paulo 12227-010 Brazil Stanford University Stanford 94305 CA United States Università di Roma Tor Vergata Roma I-00133 Italy INFN Sezione di Roma Tor Vergata Roma I-00133 Italy Cardiff University Cardiff CF24 3AA United Kingdom Universiteit Antwerpen Antwerpen 2000 Belgium International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino Torino I-10125 Italy Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena Jena D-07743 Germany Dipartimento di Fisica Università degli Studi di Torino Torino I-10125 Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom OzGrav University of Western Australia Crawley 6009 WA

Continuous gravitational waves (CWs) emission from neutron stars carries information about their internal structure and equation of state, and it can provide tests of general relativity. We present a search for CWs from a set of 45 known pulsars in the first part of the fourth LIGO-Virgo-KAGrA observing run, known as O4a. We conducted a targeted search for each pulsar using three independent analysis methods considering single-harmonic and dual-harmonic emission models. We find no evidence of a CW signal in O4a data for both models and set upper limits on the signal amplitude and on the ellipticity, which quantifies the asymmetry in the neutron star mass distribution. For the single-harmonic emission model, 29 targets have the upper limit on the amplitude below the theoretical spin-down limit. The lowest upper limit on the amplitude is 6.4 × 10^-27 for the young energetic pulsar J0537-6910, while the lowest constraint on the ellipticity is 8.8 × 10^-9 for the bright nearby millisecond pulsar J0437-4715. Additionally, for a subset of 16 targets, we performed a narrowband search that is more robust regarding the emission model, with no evidence of a signal. We also found no evidence of nonstandard polarizations as predicted by the Brans-dicke theory. © 2025. The Author(s). Published by the American Astronomical Society.

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An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630–47

arXiv

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arXiv 2022年

作者： Yang, Zi-Xu Zhang, Liang Huang, Yue Bu, Qingcui Zhang, Zhen Liu, He-Xin Yu, Wei Wang, Peng-Ju Zhao, Q.C. Tao, L. Qu, Jin-Lu Zhang, Shu Zhang, Shuang-Nan Song, Liming Lu, Fangjun Cao, Xuelei Chen, Li Cai, Ce Chang, Zhi Chen, Tianxian Chen, Yong Chen, Yupeng Chen, Yibao Cui, Weiwei ding, Guoqiang du, Yuanyuan Gao, Guanhua Gao, He Ge, Mingyu Gu, Yudong Guan, Ju Guo, Chengcheng Han, dawei Huo, Jia Jia, Shumei Jiang, Weichun Jin, Jing Kong, Lingda Li, Bing Li, Gang Li, Wei Li, Xian Li, Xufang Li, Zhengwei Li, Chengkui Lin, Lin Liu, Congzhan Li, Tipei Li, Xiaobo Liang, Xiaohua Liao, Jinyuan Liu, Hongwei Liu, Xiaojing Lu, Xuefeng Luo, Qi Luo, Tao Ma, Binyuan Ma, ruiCan Ma, Xiang Meng, Bin Nang, Yi Nie, Jianyin Ou, Ge ren, Xiaoqin Sai, Na Song, Xinying Sun, Liang Tan, Ying Tuo, Youli Wang, Chen Wang, Wenshuai Wang, Lingjun Wang, Yusa Wang, Jieshuang Wen, Xiangyang Wu, Bobing Wu, Baiyang Wu, Mei Xiao, Shuo Xu, Yupeng Xiong, Shaolin Yang, Sheng Yang, Yanji Yi, Qibin Yin, Qianqing You, Yuan Zhang, Bing Zhang, Fan Zhang, Hongmei Zhang, Juan Zhang, Wanchang Zhang, Wei Zhang, Binbin Zhang, Peng Zhang, Yifei Zhang, Yuanhang Zhao, Haisheng Zhao, Xiaofan Zheng, Shijie Zhou, dengke Key Laboratory for Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences 19B Yuquan Road Beijing100049 China University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing100049 China Institut für Astronomie und Astrophysik Kepler Center for Astro and Particle Physics Eberhard Karls Universität Sand 1 TübingenD-72076 Germany Department of Astronomy Beijing Normal University Beijing100088 China Department of Physics Tsinghua University Beijing100084 China Xinjiang Astronomical Observatory Chinese Academy of Sciences 150 Science 1- Street Urumqi Xinjiang830011 China Department of Astronomy Tsinghua University Beijing100084 China Computing Division Institute of High Energy Physics Chinese Academy of Sciences 19B Yuquan Road Beijing100049 China Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China Max-Planck-Institut für Kernphysik Saupfercheckweg 1 HeidelbergD-69117 Germany School of Physics and Optoelectronics Xiangtan University Yuhu District Xiangtan Hunan411105 China Department of Physics and Astronomy University of Nevad Las VegasNV89154 United States School of Astronomy and Space Science Nanjing University Nanjing210023 China

Here we report the spectral-timing results of the black hole X-ray binary 4U 1630–47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope (Insight-HXMT). Type-C quasi-periodic oscillations (QPOs) in ∼1.6–4.2 Hz and quasi-regular modulation (QrM) near 60 mHz are detected during the outburst. The mHz QrM has a fractional rms of ∼10%–16% in the 8–35 keV energy band with a Q factor (frequency/width) of ∼2–4. Benefiting from the broad energy band of Insight-HXMT, we study the energy dependence of the ∼60 mHz QrM in 1–100 keV for the first time. We find that the fractional rms of the mHz QrM increases with photon energy, while the time lags of the mHz QrM are soft and decrease with photon energy. Fast recurrence of the mHz QrM, in a timescale of less than one hour, has been observed during the outburst. during this period, the corresponding energy spectra moderately change when the source transitions from the QrM state to the non-QrM state. The QrM phenomena also shows a dependence with the accretion rate. We suggest that the QrM could be caused by an unknown accretion instability aroused from the corona. Copyright © 2022, The Authors. All rights reserved.

关键词： Black holes

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reciprocating Magnetic Fields in the Pulsar Wind Observed from the Black Widow Pulsar J1720−0534

arXiv

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arXiv 2023年

作者： Miao, Chen-Chen Blackmon, Victoria Zhu, Wei-Wei Li, dong-Zi Ge, Mingyu You, Xiao-Peng McLaughlin, Maura Li, di Wang, Na Wang, Pei Niu, Jia-rui Cruces, M. Yuan, Jian-Ping Bai, Jun-Tao Champion, d.J. Chen, Yu-Tong Chi, Ming-Min Freire, P.C.C. Feng, Yi Gan, Zhen-Ye Kramer, M. Kou, Fei-Fei Li, Yu-Xi Miao, Xue-Li Meng, Ling-Qi Niu, Chen-Hui Sun, Sheng-Nan Sun, Zhong-Yi Tedila, H.M. Wang, Shuang-Qiang Wu, Qing-dong Wang, Jing-Bo Wen, Zhi-Gang Wang, Shen Wang, Ya-Biao Wang, Cheng-Jie Xue, Meng-Yao Yue, You-Ling Yuan, Mao Yao, Ju-Mei Yan, Wen-Ming Zhao, ru-Shuang Zhang, Lei Zhao, de National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China West Virginia University 1500 University Ave MorgantownWV26506 United States Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Beijing102206 China Cahill Center for Astronomy and Astrophysics California Institute of Technology 1216 E California Boulevard PasadenaCA91125 United States Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China School of Physical Science and Technology Southwest University Chongqing400715 China Research Center for Intelligent Computing Platforms Zhejiang Laboratory Hangzhou311100 China Xinjiang Astronomical Observatory Chinese Academy of Sciences Xinjiang Urumqi830011 China Max-Planck Institut für Radioastronomie Auf dem Hügel 69 BonnD-53121 Germany School of Computer Science Fudan University Shanghai200433 China Guizhou Normal University Guiyang550001 China College of Physical Science and Technology Central China Normal University Wuhan430079 China Institute of Optoelectronic Technology Lishui University Zhejiang Lishui323000 China Tencent Youtu Lab Tencent Youtu Lab Shanghai200233 China

We report the radio observations of the eclipsing black widow pulsar J1720−0534, a 3.26 ms pulsar in orbit with a low mass companion of mass 0.029 to 0.034 M☉. We obtain the phase-connected timing ephemeris and polarization profile of this millisecond pulsar (MSP) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), the Green Bank Telescope (GBT), and the Parkes Telescope. For the first time from such a system, an oscillatory polarisation angle change was observed from a particular eclipse egress with partial depolarization, indicating 10-milliGauss-level reciprocating magnetic fields oscillating in a length scale of 5×103 km (assuming an orbital inclination angle of 90 degrees) outside the companion’s magnetosphere. The dispersion measure variation observed during the ingresses and egresses shows the rapid raising of the electron density in the shock boundary between the companion’s magnetosphere and the surrounding pulsar wind. We suggest that the observed oscillatory magnetic fields originate from the pulsar wind outside the companion’s magnetosphere. © 2023, CC BY-NC-Nd.

关键词： Magnetic fields

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Coupled-channel approach to Tcc+ including three-body effects

arXiv

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arXiv 2021年

作者： du, Meng-Lin Baru, Vadim dong, Xiang-Kun Filin, Arseniy Guo, Feng-Kun Hanhart, Christoph Nefediev, Alexey Nieves, Juan Wang, Qian Institutos de Investigación de Paterna Apartado 22085 Valencia46071 Spain Institut für Theoretische Physik II Ruhr-Universität Bochum BochumD-44780 Germany Institute for Theoretical and Experimental Physics NRC Kurchatov Institute Moscow117218 Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Institute for Advanced Simulation Institut für Kernphysik Jülich Center for Hadron Physics Forschungszentrum Jülich JülichD-52425 Germany P.N. Lebedev Physical Institute The Russian Academy of Sciences Leninskiy Prospect 53 Moscow119991 Russia Moscow Institute of Physics and Technology Institutsky lane 9 Moscow Region Dolgoprudny141700 Russia Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University Guangzhou510006 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China

A coupled-channel approach is applied to the charged tetraquark state Tcc+ recently discovered by the LHCb Collaboration. The parameters of the interaction are fixed by a fit to the observed line shape in the three-body d0d0π+ channel. Special attention is paid to the three-body dynamics in the Tcc+ due to the finite life time of the d∗. An approach to the Tcc+ is argued to be self-consistent only if both manifestations of the three-body dynamics, the pion exchange between the d and d∗ mesons and the finite d∗ width, are taken into account simultaneously to ensure that three-body unitarity is preserved. This is especially important to precisely extract the pole position in the complex energy plane whose imaginary part is very sensitive to the details of the coupled-channel scheme employed. The d0d0 and d0d+ invariant mass distributions, predicted based on this analysis, are in good agreement with the LHCb data. The low-energy expansion of the d∗d scattering amplitude is performed and the low-energy constants (the scattering length and effective range) are extracted. The compositeness parameter of the Tcc+ is found to be close to unity, which implies that the Tcc+ is a hadronic molecule generated by the interactions in the d∗+d0 and d∗0d+ channels. Employing heavy-quark spin symmetry, an isoscalar d∗d∗ molecular partner of the Tcc+ with JP = 1+ is predicted under the assumption that the dd∗-d∗d∗ coupled-channel effects can be neglected. Copyright © 2021, The Authors. All rights reserved.

关键词： Hadrons

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24.4: Planar Triode Structure Carbon Nanotubes Field Emission display

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SId Symposium digest of Technical Papers 2012年第1期34卷

作者： Chun-Tao Lee Hua-Chi Cheng Yu-Yang Chang Jyh-rong Sheu Jane-Hway Liao Ching-Shiun Cho Shin-Chiuan Jiang Jia-Chong Ho Shin-Mao Huang Ming-Chun Hsiao Ying-Xian Chen Wei-Yi Lin Yun-Jiau Shiau Wen-Kuei Huang Cheng-Chung Lee Bing-Yue Tsui Yung-Chiang Lan Electronics Research and Service Organization Industrial Technology Research Institute E1100 ERSO/ITRI 195-4 Sec.4 Chung Hsing Rd. Chutung Hsinchu Taiwan 310 ROC Department of Electronics Engineering and Institute of Electronics National Chiao-Tung University Hsinchu 300 Taiwan R.O.C National Center for High-performance Computing 7 R&D Rd. VI Science Park Hsinchu Taiwan R.O.C.

A new planar triode structure of CNT-FEd has been fabricated. The gate electrode and the CNTs emitters were almost on the same plane. The gate pulls out the electrons from the both side CNTs emitters. The electron bea...

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Effective range expansion for narrow near-threshold resonances

arXiv

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arXiv 2021年

作者： Baru, Vadim dong, Xiang-Kun du, Meng-Lin Filin, Arseniy Guo, Feng-Kun Hanhart, Christoph Nefediev, Alexey Nieves, Juan Wang, Qian Institut für Theoretische Physik II Ruhr-Universität Bochum BochumD-44780 Germany CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Zhong Guan Cun East Street 55 Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Institutos de Investigación de Paterna C/Catedrático José Beltrán 2 Paterna ValenciaE-46980 Spain Institute for Advanced Simulation Institut für Kernphysik Jülich Center for Hadron Physics Forschungszentrum Jülich JülichD-52425 Germany P.N. Lebedev Physical Institute the Russian Academy of Sciences Leninskiy Prospect 53 Moscow119991 Russia Moscow Institute of Physics and Technology 141700 Institutsky lane 9 Dolgoprudny Moscow Region Russia Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University Guangzhou510006 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China

We discuss some general features of the effective range expansion, the content of its parameters with respect to the nature of the pertinent near-threshold states and the necessary modifications in the presence of coupled channels, isospin violations and unstable constituents. As illustrative examples, we analyse the properties of the χc1(3872) and Tcc+ states supporting the claim that these exotic states have a predominantly molecular nature. Copyright © 2021, The Authors. All rights reserved.

关键词： Expansion

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CP2K: An electronic structure and molecular dynamics software package quickstep: Efficient and accurate electronic structure calculations

arXiv

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arXiv 2020年

作者： Kühne, Thomas d. Iannuzzi, Marcella Ben, Mauro del rybkin, Vladimir V. Seewald, Patrick Stein, Frederick Laino, Teodoro Khaliullin, rustam Z. Schütt, Ole Schiffmann, Florian Golze, dorothea Wilhelm, Jan Chulkov, Sergey Bani-Hashemian, Mohammad Hossein Weber, Valéry Borštnik, Urban Taillefumier, Mathieu Jakobovits, Alice Shoshana Lazzaro, Alfio Pabst, Hans Müller, Tiziano Schade, robert Guidon, Manuel Andermatt, Samuel Holmberg, Nico Schenter, Gregory K. Hehn, Anna Bussy, Augustin Belleflamme, Fabian Tabacchi, Gloria Glöß, Andreas Lass, Michael Bethune, Iain Mundy, Christopher J. Plessl, Christian Watkins, Matt VandeVondele, Joost Krack, Matthias Hutter, Jürg Dynamics of Condensed Matter and Center for Sustainable Systems Design Chair of Theoretical Chemistry Paderborn University Warburger Str. 100 PaderbornD-33098 Germany Department of Chemistry University of Zurich Winterthurerstrasse 190 ZürichCH-8057 Switzerland Computational Research Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States IBM Research - Zurich Säumerstrasse 4 RüschlikonCH-8803 Switzerland Department of Chemistry McGill University CH-801 Sherbrooke St. West MontrealQCH3A 0B8 Canada Department of Materials ETH Zürich ZürichCH-8092 Switzerland Centre of Policy Studies Victoria University Melbourne Australia Department of Applied Physics Aalto University Otakaari 1 EspooFI-02150 Finland Institute of Theoretical Physics University of Regensburg Universitätsstraße 31 RegensburgD-93053 Germany School of Mathematics and Physics University of Lincoln Brayford Pool Lincoln United Kingdom Integrated Systems Laboratory ETH Zürich ZürichCH-8092 Switzerland Scientific IT Services ETH Zürich Zürich Switzerland ETH Zürich HPE Switzerland GmbH Basel Switzerland Intel Extreme Computing Software and Systems Zürich Switzerland Department of Computer Science and Paderborn Center for Parallel Computing Paderborn University Warburger Str. 100 PaderbornD-33098 Germany Department of Chemistry and Materials Science Aalto University P.O. Box 16100 Aalto00076 Finland Physical Science Division Pacific Northwest National Laboratory P. O. Box 999 RichlandWA99352 United States Department of Science and High Technology University of Insubria INSTM via Valleggio 9 ComoI-22100 Italy BASF SE Carl-Bosch-Straße 38 Ludwigshafen am RheinD-67056 Germany Hartree Centre Science and Technology Facilities Council United Kingdom Laboratory for Scientific Computing and Modelling Paul Scherrer Institute Villigen PSICH-5232 Switzerland

CP2K is an open source electronic structure and molecular dynamics software package to perform atomistic simulations of solid-state, liquid, molecular and biological systems. It is especially aimed at massively-parallel and linear-scaling electronic structure methods and state-of-the-art ab-initio molecular dynamics simulations. Excellent performance for electronic structure calculations is achieved using novel algorithms implemented for modern high-performance computing systems. This review revisits the main capabilities of CP2K to perform efficient and accurate electronic structure simulations. The emphasis is put on density functional theory and multiple post-Hartree-Fock methods using the Gaussian and plane wave approach and its augmented all-electron extension. Copyright © 2020, The Authors. All rights reserved.

关键词： Electronic structure

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Scaling properties of flow harmonics of deuterons and protons in Au+Au reactions at 1.23 AGeV

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Journal of Physics: Conference Series 2020年第1期1667卷

作者： Paula Hillmann Jan Steinheimer Tom reichert Vincent Gaebel Marcus Bleicher Sukanya Sombun Christoph Herold Ayut Limphirat Institut für Theoretische Physik Goethe Universität Frankfurt Max-von-Laue-Str. 1 D-60438 Frankfurt am Main Germany Frankfurt Institute for Advanced Studies Ruth-Moufang-Str. 1 60438 Frankfurt am Main Germany GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstr. 1 64291 Darmstadt Germany John von Neumann-Institut für Computing Forschungszentrum Jülich 52425 Jülich Germany School of Physics and Center of Excellence in High Energy Physics & Astrophysics Suranaree University of Technology Nakhon Ratchasima 30000 Thailand

We explore the scaling properties of the elliptic and quadrangular flow of deuterons and protons in Au+Au reactions at a beam energy of 1.23 AGeV within the UrQMd approach. These investigations are of great interest for the HAdES experiment at GSI that has recently studied the flow of light nuclei. In the present studies, deuterons are formed via phase-space coalescence. Our results agree well with the experimental data, if for this low energy a hard equation of state is considered. We observe that protons and deuterons show direct scaling with the mass number A. We also see scaling of higher order flow harmonics, e.g. υ4 ~ .

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high-precision search for dark photon dark matter with the Parkes Pulsar Timing Array

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Physical review research 2022年第1期4卷 L012022-L012022页

作者： Xiao Xue Zi-Qing Xia Xingjiang Zhu Yue Zhao Jing Shu Qiang Yuan N. d. ramesh Bhat Andrew d. Cameron Shi dai Yi Feng Boris Goncharov George Hobbs Eric Howard richard N. Manchester Aditya Parthasarathy daniel J. reardon Christopher J. russell ryan M. Shannon renée Spiewak Nithyanandan Thyagarajan Jingbo Wang Lei Zhang Songbo Zhang II. Institut für Theoretische Physik Universität Hamburg Luruper Chaussee 149 D-22761 Hamburg Germany Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210023 China Advanced Institute of Natural Sciences Beijing Normal University at Zhuhai 519087 China School of Physics and Astronomy Monash University Clayton Victoria 3800 Australia OzGrav: The ARC Centre of Excellence for Gravitational Wave Discovery Hawthorn Victoria 3122 Australia Department of Physics and Astronomy University of Utah Salt Lake City Utah 84112 USA CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China CAS Center for Excellence in Particle Physics Beijing 100049 China Center for High Energy Physics Peking University Beijing 100871 China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China International Centre for Theoretical Physics Asia-Pacific Beijing/Hangzhou China School of Astronomy and Space Science University of Science and Technology of China Hefei 230026 China International Centre for Radio Astronomy Research Curtin University Bentley Western Australia 6102 Australia Australia Telescope National Facility CSIRO Astronomy and Space Science Epping New South Wales 1710 Australia Centre for Astrophysics and Supercomputing Swinburne University of Technology Hawthorn Victoria 3122 Australia School of Science Western Sydney University Locked Bag 1797 Penrith South DC NSW 2751 Australia Research Institute of Artificial Intelligence Zhejiang Lab Hangzhou Zhejiang 311121 China Macquarie University Department of Physics and Astronomy Sydney New South Wales 2109 Australia Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 D-53121 Bonn Germany CSIRO Sc

The nature of dark matter remains obscure in spite of decades of experimental efforts. The mass of dark matter candidates can span a wide range, and its coupling with the Standard Model sector remains uncertain. All these unknowns make the detection of dark matter extremely challenging. Ultralight dark matter, with m∼10−22 eV, is proposed to reconcile the disagreements between observations and predictions from simulations of small-scale structures in the cold dark matter paradigm while remaining consistent with other observations. Because of its large de Broglie wavelength and large local occupation number within galaxies, ultralight dark matter behaves like a coherently oscillating background field with an oscillating frequency dependent on its mass. If the dark matter particle is a spin-1 dark photon, such as the U(1)B or U(1)B−L gauge boson, it can induce an external oscillating force and lead to displacements of test masses. Such an effect would be observable in the form of periodic variations in the arrival times of radio pulses from highly stable millisecond pulsars. In this study, we search for evidence of ultralight dark photon dark matter (dPdM) using 14-year high-precision observations of 26 pulsars collected with the Parkes Pulsar Timing Array. While no statistically significant signal is found, we place constraints on coupling constants for the U(1)B and U(1)B−L dPdM. Compared with other experiments, the limits on the dimensionless coupling constant ε achieved in our study are improved by up to two orders of magnitude when the dark photon mass is smaller than 3×10−22 eV (10−22 eV) for the U(1)B (U(1)B−L) scenario.

关键词： dark matter radio, microwave, & sub-mm astronomy Hypothetical gauge bosons Neutron stars & pulsars Electromagnetic radiation astronomy

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