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Studies on electromagnetic dipole responses of atomic nuclei at RCNP 在 RCNP 研究原子核的电磁偶极响应
AAPPS Bulletin Pub Date : 2024-01-11 DOI: 10.1007/s43673-023-00108-0
Atsushi Tamii, Nobuyuki Kobayashi
{"title":"Studies on electromagnetic dipole responses of atomic nuclei at RCNP","authors":"Atsushi Tamii,&nbsp;Nobuyuki Kobayashi","doi":"10.1007/s43673-023-00108-0","DOIUrl":"10.1007/s43673-023-00108-0","url":null,"abstract":"<div><p>Electric dipole (<i>E</i>1) and spin-magnetic dipole (spin-<i>M</i>1) responses of nuclei have been studied by proton inelastic scattering experiments at forward angles, including zero degrees, at the Research Center for Nuclear Physics (RCNP) by employing a proton beam 295 or 392 MeV and the high-resolution magnetic spectrometer Grand Raiden. The <i>E</i>1 response of nuclei is the most fundamental nuclear response to the external field and is relevant to photo-nuclear reactions. After introducing the relevant nuclear matrix elements and the experimental methods, several recent experimental works are highlighted that include (<i>E</i>1) polarizability and the extraction of the symmetry energy parameters, pygmy dipole resonance, gamma-coincidence measurements, isoscalar and isovector spin-<i>M</i>1 excitations and the <i>np</i> spin correlation in the ground state, and gamma-emission probability for neutral current neutrino detection. A project, PANDORA, is introduced that aims at a systematic study of photo-nuclear reactions and decay branching ratios for light nuclei.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00108-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139438060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
STM studies for surface-mounted molecular rotors: a mini review 表面安装分子转子的 STM 研究：小型综述
AAPPS Bulletin Pub Date : 2024-01-09 DOI: 10.1007/s43673-023-00107-1
Tianyi Yang, Ruiqin Zhang
{"title":"STM studies for surface-mounted molecular rotors: a mini review","authors":"Tianyi Yang,&nbsp;Ruiqin Zhang","doi":"10.1007/s43673-023-00107-1","DOIUrl":"10.1007/s43673-023-00107-1","url":null,"abstract":"<div><p>A molecular rotor is a molecule/molecular system that performs rotary motions under an external stimulus. Molecular rotors are promising for applications in medicine, optical usage, information science, etc. A molecular rotor is also a crucial component in constructing more sophisticated functional molecular machines. Anchoring molecular rotors on surfaces is regarded as a feasible way of building functional molecular rotor systems. Scanning tunneling microscope (STM) is a powerful tool for studying surface dynamics in real space on atomic precision. It provides an ideal platform for both qualitatively and quantitively investigating single and self-assembled molecular rotors mounted on surfaces. Herein, we review a series of studies utilizing STM to unveil the methodologies that are increasingly used in the area of surface-mounted molecule rotors. A combined usage of these methodologies is more and more necessary for researchers to advance the molecular rotor study in future.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00107-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The two-body strong decays of the fully-charm tetraquark states 全粲四夸克态的二体强衰变
AAPPS Bulletin Pub Date : 2024-01-08 DOI: 10.1007/s43673-023-00112-4
Zhi-Gang Wang, Xiao-Song Yang
{"title":"The two-body strong decays of the fully-charm tetraquark states","authors":"Zhi-Gang Wang,&nbsp;Xiao-Song Yang","doi":"10.1007/s43673-023-00112-4","DOIUrl":"10.1007/s43673-023-00112-4","url":null,"abstract":"<div><p>We study the hadronic coupling constants in the two-body strong decays of the fully-charm tetraquark states with the <span>(J^{PC}=0^{++})</span>, <span>(1^{+-})</span>, and <span>(2^{++})</span> via the QCD sum rules based on rigorous quark-hadron duality. Then we obtain the hadronic coupling constants and partial decay widths therefore total decay widths, which support assigning the <i>X</i>(6552) as the first radial excitation of the scalar tetraquark state. And other predictions can be used to diagnose exotic states in the future.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00112-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142410589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cosmological gravitational waves from isocurvature fluctuations 等曲率波动产生的宇宙学引力波
AAPPS Bulletin Pub Date : 2024-01-06 DOI: 10.1007/s43673-023-00109-z
Guillem Domènech
{"title":"Cosmological gravitational waves from isocurvature fluctuations","authors":"Guillem Domènech","doi":"10.1007/s43673-023-00109-z","DOIUrl":"10.1007/s43673-023-00109-z","url":null,"abstract":"<div><p>Gravitational waves induced by large primordial curvature fluctuations may result in a sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are gradually generated by initial isocurvature fluctuations, which in turn induce gravitational waves. Initial isocurvature fluctuations commonly appear in multi-field models of inflation as well as in the formation of scattered compact objects in the very early universe, such as primordial black holes and solitons like oscillons and cosmic strings. Here, we provide a review on isocurvature induced gravitational waves and its applications to dark matter and the primordial black hole dominated early universe.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00109-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142410191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flat bands, sharp physics 平带、锐利物理
AAPPS Bulletin Pub Date : 2024-01-02 DOI: 10.1007/s43673-023-00113-3
Daniel Leykam
{"title":"Flat bands, sharp physics","authors":"Daniel Leykam","doi":"10.1007/s43673-023-00113-3","DOIUrl":"10.1007/s43673-023-00113-3","url":null,"abstract":"<div><p>Flat bands arise in periodic media when symmetries or fine-tuning result in perfect wavepacket localisation. Flat band localisation is fragile and exhibits remarkably sharp sensitivity to perturbations including interactions and disorder, leading to a variety of interesting quantum and classical phenomena. Originally a theoretical curiosity, advances in fabrication methods have allowed flat band physics to be observed down to the nanoscale. This article briefly reviews progress in the study of flat bands and disorder over the past decade and provides an outlook on where this exciting field is headed.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00113-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139390238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phonon thermal transport in bilayer polycrystalline graphene nanoribbons: effects of interlayer interaction, grain size, and vacancy defects 双层多晶石墨烯纳米带中的声子热传输：层间相互作用、晶粒尺寸和空位缺陷的影响
AAPPS Bulletin Pub Date : 2024-01-02 DOI: 10.1007/s43673-023-00111-5
Zi-Qiang Yang, Muhammad Asif Shakoori, Hai-Peng Li
{"title":"Phonon thermal transport in bilayer polycrystalline graphene nanoribbons: effects of interlayer interaction, grain size, and vacancy defects","authors":"Zi-Qiang Yang,&nbsp;Muhammad Asif Shakoori,&nbsp;Hai-Peng Li","doi":"10.1007/s43673-023-00111-5","DOIUrl":"10.1007/s43673-023-00111-5","url":null,"abstract":"<div><p>In this paper, molecular dynamics simulations have been employed to investigate the phonon thermal transport in bilayer polycrystalline graphene nanoribbon (pGNR/pGNR), compared with bilayer graphene nanoribbon (GNR/GNR) and pGNR/GNR heterostructure. The interfacial thermal resistance (ITR) of bilayer structures was also calculated using the heat dissipation method. The effects of interlayer interaction, grain size, and vacancy defects on ITR and in-plane phonon thermal conductivity of bilayer structures were investigated. It was found that the ITR as well as in-plane phonon thermal conductivity of pGNR/pGNR wa<u>s</u> less than that of pGNR/GNR and much less than that of GNR/GNR, for the same size. For the studied bilayer structures, both the ITR and in-plane phonon thermal conductivity decrease with increasing interlayer interactions. Moreover, ITR increases with increasing grain area size whereas decreases with increasing vacancy defects in pGNR-based bilayers. The introduction of pGNR interface roughness and vacancy defects results in an enhanced phonon coupling in pGNR-based bilayers compared to pure GNR/GNR bilayers. Presented simulation investigations will help to understand the interlayer thermal transport properties of polycrystalline graphene and provide essential guidance for experimentally regulating phonon thermal transport between layers of polycrystalline graphene.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00111-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139390645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Collection of unconventional transport phenomena: natural obstacle or vibrant guiding principle for the design of molecular junctions? 收集非常规传输现象：设计分子连接的自然障碍还是充满活力的指导原则？
AAPPS Bulletin Pub Date : 2024-01-02 DOI: 10.1007/s43673-023-00110-6
Jinlong Ren, Tianchen Li, Zhuang Li, Decheng Kong, Guangcun Shan, KunPeng Dou
{"title":"Collection of unconventional transport phenomena: natural obstacle or vibrant guiding principle for the design of molecular junctions?","authors":"Jinlong Ren,&nbsp;Tianchen Li,&nbsp;Zhuang Li,&nbsp;Decheng Kong,&nbsp;Guangcun Shan,&nbsp;KunPeng Dou","doi":"10.1007/s43673-023-00110-6","DOIUrl":"10.1007/s43673-023-00110-6","url":null,"abstract":"<div><p>The real atomic scale details of molecular junctions would be of much complexity and can yield a plethora of “counterintuitive” results. Here, we provide an overview of four unconventional intentional or unintentional transport phenomena in molecular junctions, in particular, unconventional tunneling length-dependent transport behavior, deviation from Kirchhoff’s superposition law, dual roles of imperfect engineering, and masked quantum interference. These abnormal phenomena are not engaged in a dead end. On the contrary, it offers plenty of research opportunities in molecular electronics.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00110-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
News and views (11&12) 新闻和观点 (11&12)
AAPPS Bulletin Pub Date : 2023-12-14 DOI: 10.1007/s43673-023-00101-7
AAPPS Bulletin
{"title":"News and views (11&12)","authors":"AAPPS Bulletin","doi":"10.1007/s43673-023-00101-7","DOIUrl":"10.1007/s43673-023-00101-7","url":null,"abstract":"","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00101-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulating Gaussian boson sampling quantum computers 模拟高斯玻色子采样量子计算机
AAPPS Bulletin Pub Date : 2023-11-29 DOI: 10.1007/s43673-023-00099-y
Alexander S. Dellios, Margaret D. Reid, Peter D. Drummond
{"title":"Simulating Gaussian boson sampling quantum computers","authors":"Alexander S. Dellios,&nbsp;Margaret D. Reid,&nbsp;Peter D. Drummond","doi":"10.1007/s43673-023-00099-y","DOIUrl":"10.1007/s43673-023-00099-y","url":null,"abstract":"<div><p>A growing cohort of experimental linear photonic networks implementing Gaussian boson sampling (GBS) have now claimed quantum advantage. However, many open questions remain on how to effectively verify these experimental results, as scalable methods are needed that fully capture the rich array of quantum correlations generated by these photonic quantum computers. In this paper, we briefly review recent theoretical methods to simulate experimental GBS networks. We focus mostly on methods that use phase-space representations of quantum mechanics, as these methods are highly scalable and can be used to validate experimental outputs and claims of quantum advantage for a variety of input states, ranging from the ideal pure squeezed vacuum state to more realistic thermalized squeezed states. A brief overview of the theory of GBS, recent experiments, and other types of methods are also presented. Although this is not an exhaustive review, we aim to provide a brief introduction to phase-space methods applied to linear photonic networks to encourage further theoretical investigations.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00099-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atomic construction and spectroscopic characterization of FeSe-derived thin films on SrTiO3 substrates SrTiO3 基底上的 FeSe 衍生薄膜的原子构造和光谱特性分析
AAPPS Bulletin Pub Date : 2023-11-27 DOI: 10.1007/s43673-023-00106-2
Yao Zhang, Zhi-Mo Zhang, Jin-Hua Nie, Wenhao Zhang, Ying-Shuang Fu
{"title":"Atomic construction and spectroscopic characterization of FeSe-derived thin films on SrTiO3 substrates","authors":"Yao Zhang,&nbsp;Zhi-Mo Zhang,&nbsp;Jin-Hua Nie,&nbsp;Wenhao Zhang,&nbsp;Ying-Shuang Fu","doi":"10.1007/s43673-023-00106-2","DOIUrl":"10.1007/s43673-023-00106-2","url":null,"abstract":"<div><p>Controllably fabricating low-dimensional systems and unraveling their exotic states at the atomic scale is a pivotal step for the construction of quantum functional materials with emergent states. Here, by utilizing the elaborated molecular beam epitaxy growth, we obtain various Fe<sub>x</sub>Se<sub>y</sub> phases beyond the single-layer FeSe/SrTiO<sub>3</sub> films. A synthetic strategy of lowering substrate temperature with superfluous Se annealing is implemented to achieve various stoichiometric FeSe-derived phases, ranging from 1:1 to 5:8. The phase transitions and electronic structure of these Fe<sub>x</sub>Se<sub>y</sub> phases are systematically characterized by atomic resolution scanning tunneling microscopy measurements. We observe the long-ranged antiferromagnetic order of the Fe<sub>4</sub>Se<sub>5</sub> phase by spin-polarized signals with striped patterns, which is also verified by their magnetic response of phase shift between adjacent domains. The electronic doping effect in insulating Fe<sub>4</sub>Se<sub>5</sub> and the kagome effect in metallic Fe<sub>5</sub>Se<sub>8</sub> are also discussed, where the kagome lattice is a promising structure to manifest both spin frustration of d electrons in a quantum-spin-liquid phase and correlated topological states with flat-band physics. Our study provides promising opportunities for constructing artificial superstructures with tunable building blocks, which is helpful for understanding the emergent quantum states and their correlation with competing orders in the FeSe-based family.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00106-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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