AAPPS Bulletin最新文献_第2页

Progress in acoustic measurements and geoacoustic applications 声学测量和地质声学应用方面的进展

AAPPS Bulletin Pub Date : 2024-08-21 DOI: 10.1007/s43673-024-00127-5

Lin Fa, Huiting Yang, Yuxiao Fa, Shuangshuang Meng, Jurong Bai, Yandong Zhang, Xiangrong Fang, Xiao Zou, Xinhao Cui, Yanli Wang, Meishan Zhao

{"title":"Progress in acoustic measurements and geoacoustic applications","authors":"Lin Fa, Huiting Yang, Yuxiao Fa, Shuangshuang Meng, Jurong Bai, Yandong Zhang, Xiangrong Fang, Xiao Zou, Xinhao Cui, Yanli Wang, Meishan Zhao","doi":"10.1007/s43673-024-00127-5","DOIUrl":"10.1007/s43673-024-00127-5","url":null,"abstract":"<div><p>Geoacoustic exploration is a rapidly evolving field investigating underground rock formations and sediment environments through acoustic waves. In this paper, we present a review of recent research progress, focusing on newly discovered physical phenomena, such as the reflection and refraction of acoustic waves at the interface between anisotropic rocks and between liquid and solid, the characteristics of electric-acoustic (and acoustic-electric) conversion of piezoelectric transducers, the physical mechanism of acoustic wave propagation in viscous media, and the generation of intrinsic noise. We developed new physical models, introduced a parallel transmission network describing piezoelectric transducers for electric-acoustic (and acoustic-electric) energy transfer, and derived new formulations and algorithms associated with the latest model. We will discuss the potential of abnormal incidence angle, acoustic attenuation, and acoustic Goos-Hänchen effect and propose a method of inversion of formation reflection coefficient using logging and seismic data acquired from anisotropic rocks with dip angle. We will also discuss the physical mechanism and potential applications of the intrinsic noise generated inside viscous solid media. Finally, we introduce a parallel/series lumped vibrational transmission network, explain the acoustic measurement process, and discuss applications of the Kaiser effect in petroleum engineering.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-024-00127-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412877","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

Encircling the Liouvillian exceptional points: a brief review 环绕柳维亚例外点：简要回顾

AAPPS Bulletin Pub Date : 2024-08-20 DOI: 10.1007/s43673-024-00129-3

Konghao Sun, Wei Yi

{"title":"Encircling the Liouvillian exceptional points: a brief review","authors":"Konghao Sun, Wei Yi","doi":"10.1007/s43673-024-00129-3","DOIUrl":"10.1007/s43673-024-00129-3","url":null,"abstract":"<div><p>Exceptional points are the branch-point singularities of non-Hermitian Hamiltonians and have rich consequences in open-system dynamics. While the exceptional points and their critical phenomena are widely studied in the non-Hermitian settings without quantum jumps, they also emerge in open quantum systems depicted by the Lindblad master equations, wherein they are identified as the degeneracies in the Liouvillian eigenspectrum. These Liouvillian exceptional points often have distinct properties compared to their counterparts in non-Hermitian Hamiltonians, leading to fundamental modifications of the steady states or the steady-state-approaching dynamics. Since the Liouvillian exceptional points widely exist in quantum systems such as the atomic vapors, superconducting qubits, and ultracold ions and atoms, they have received increasing amount of attention of late. Here, we present a brief review on an important aspect of the dynamic consequence of Liouvillian exceptional points, namely the chiral state transfer induced by the parametric encircling the Liouvillian exceptional points. Our review focuses on the theoretical description and experimental observation of the phenomena in atomic systems that are experimentally accessible. We also discuss the ongoing effort to unveil the collective dynamic phenomena close to the Liouvillian exceptional points, as a consequence of the many-body effects therein. Formally, these phenomena are the quantum-many-body counterparts to those in classical open systems with nonlinearity, but hold intriguing new potentials for quantum applications.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-024-00129-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412573","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 (7&8) 新闻与观点 (7&8)

AAPPS Bulletin Pub Date : 2024-08-09 DOI: 10.1007/s43673-024-00126-6

AAPPS Bulletin

引用次数: 0

Density functional theory study of two-dimensional hybrid organic-inorganic perovskites: frontier level alignment and chirality-induced spin splitting 二维有机-无机杂化过氧化物的密度泛函理论研究：前沿水平排列和手性诱导的自旋分裂

AAPPS Bulletin Pub Date : 2024-08-02 DOI: 10.1007/s43673-024-00125-7

Ruyi Song, Rundong Zhao

{"title":"Density functional theory study of two-dimensional hybrid organic-inorganic perovskites: frontier level alignment and chirality-induced spin splitting","authors":"Ruyi Song, Rundong Zhao","doi":"10.1007/s43673-024-00125-7","DOIUrl":"10.1007/s43673-024-00125-7","url":null,"abstract":"<div><p>Perovskites are a class of semiconductors initially recognized for their exceptional efficiency in solar cell applications. Subsequent research has revealed their diverse and attractive optoelectronic properties. Over the last decades, molecule-level engineering attempts toward the original three-dimensional (“3D”) perovskites have led to the emergence of two-dimensional (“2D”) layered crystals and introduced extensive compositional, structural, and electronic tunability through the incorporation of various organic cations to form hybrid perovskite systems. Consequently, we concentrated on the theoretical investigation of innovative and complex 2D hybrid organic-inorganic perovskites using density functional theory (DFT). A DFT-based simulation protocol has been developed, enabling the efficient simulation of hybrid perovskite systems and providing accurate explanations and predictions of various experimental phenomena. This account article summarizes the recent in-depth DFT study of the structural, electronic, and spin-related properties of 2D hybrid organic-inorganic perovskites.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-024-00125-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409397","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

Environment-induced information scrambling transition with charge conservations 环境诱导的信息扰乱转换与电荷守恒

AAPPS Bulletin Pub Date : 2024-07-20 DOI: 10.1007/s43673-024-00124-8

Pengfei Zhang, Zhenhua Yu

{"title":"Environment-induced information scrambling transition with charge conservations","authors":"Pengfei Zhang, Zhenhua Yu","doi":"10.1007/s43673-024-00124-8","DOIUrl":"10.1007/s43673-024-00124-8","url":null,"abstract":"<div><p>In generic closed quantum systems, the complexity of operators increases under time evolution governed by the Heisenberg equation, reflecting the scrambling of local quantum information. However, when systems interact with an external environment, the system-environment coupling allows operators to escape from the system, inducing a dynamical transition between the scrambling phase and the dissipative phase. This transition is known as the environment-induced information scrambling transition, originally proposed in Majorana fermion systems. In this work, we advance this discovery by investigating the transition in charge-conserved systems with space-time randomness. We construct solvable Brownian Sachdev-Ye-Kitaev models of complex fermions coupled to an environment, enabling the analytical computation of operator growth. We determine the critical dissipation strength, which is proportional to <span>(n(1-n))</span> with <i>n</i> being the density of the complex fermions, arising from the suppression in the quantum Lyapunova exponent due to the Pauli blockade in the scattering process. We further analyze the density dependence of maximally scrambled operators at late time. Our results shed light on the intriguing interplay between information scrambling, dissipation, and conservation laws.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-024-00124-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412649","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

Correction: News and Views (5&6) 更正：新闻与观点 (5&6)

AAPPS Bulletin Pub Date : 2024-07-08 DOI: 10.1007/s43673-024-00122-w

AAPPS Bulletin

引用次数: 0

The developments in carbon-modified graphitic carbon nitride for photoelectrochemical water splitting: a mini review 用于光电化学水分离的碳改性氮化石墨的发展：微型综述

AAPPS Bulletin Pub Date : 2024-06-25 DOI: 10.1007/s43673-024-00123-9

Yuewen Yang, Tingrui Xu, Ruiqin Zhang

{"title":"The developments in carbon-modified graphitic carbon nitride for photoelectrochemical water splitting: a mini review","authors":"Yuewen Yang, Tingrui Xu, Ruiqin Zhang","doi":"10.1007/s43673-024-00123-9","DOIUrl":"10.1007/s43673-024-00123-9","url":null,"abstract":"<div><p>Graphitic carbon nitride (g-CN), as a potential photoelectrode for photoelectrochemical water splitting, has garnered significant research attention owing to its favorable attributes, including a suitable bandgap, abundant elemental composition, excellent thermal stability, and non-toxicity. However, the limited efficiency of visible light absorption and poor electrical conductivity of pure g-CN result in low photocurrent density and photocatalytic activity, falling short of meeting the requirements for commercial applications. In contrast, graphitic carbon materials possess high conductivity and stability, appearing to be an excellent candidate for enhancing the photocatalytic performance of g-CN while maintaining its stability. Recently, nitrogen vacancies, surface junction, carbon crystallite introduction, and carbon atom doping methods have been employed to prepare carbon-modified g-CN. The introduced π-electron conjugated system by sp<sup>2</sup>-hybridized carbon atoms indeed extends the visible light absorption and photocurrent of g-CN, resulting in improved photocatalytic performance. In this review, we highlight recent advancements in the development of carbon-modified g-CN and offer insights into the future prospects of g-CN-based films.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-024-00123-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413590","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 (5&6) 告别 Peter Fulde；马来亚大学天文学和天体物理学研究中心 (CAAR)

AAPPS Bulletin Pub Date : 2024-06-10 DOI: 10.1007/s43673-024-00120-y

AAPPS Bulletin

引用次数: 0

News and Views (3&4) 新闻与观点 (3&4)

AAPPS Bulletin Pub Date : 2024-04-29 DOI: 10.1007/s43673-024-00119-5

AAPPS Bulletin

引用次数: 0

Surface and bulk acoustic wave resonators based on aluminum nitride for bandpass filters 基于氮化铝的带通滤波器表面和体声波谐振器

AAPPS Bulletin Pub Date : 2024-04-08 DOI: 10.1007/s43673-023-00104-4

Xian-Hu Zha, Jing-Ting Luo, Ran Tao, Chen Fu

{"title":"Surface and bulk acoustic wave resonators based on aluminum nitride for bandpass filters","authors":"Xian-Hu Zha, Jing-Ting Luo, Ran Tao, Chen Fu","doi":"10.1007/s43673-023-00104-4","DOIUrl":"10.1007/s43673-023-00104-4","url":null,"abstract":"<div><p>Bandpass filters with high frequency and wide bandwidth are indispensable parts of the fifth-generation telecommunication technologies, and currently, they are mainly based on surface and bulk acoustic wave resonators. Owing to its high mechanical strength, excellent stability at elevated temperatures, good thermal conductivity, and compatibility with complementary metal-oxide-semiconductor technology, aluminum nitride (AlN) becomes the primary piezoelectric material for high-frequency resonators. This review briefly introduces the structures and key performance parameters of the acoustic resonators. The common filter topologies are also discussed. In particular, research progresses in the piezoelectric AlN layer, electrodes, and substrates of the resonators are elaborated. Increasing the electromechanical coupling constant is the main concern for the AlN film. To synthesize AlN in single-crystalline or poly-crystalline with a high intensity of (0002) orientation, and alloy the AlN with other elements are two effective approaches. For the substrates and bottom electrodes, lattice and thermal expansion mismatch, and surface roughness are critical for the synthesis of a high-crystal-quality piezoelectric layer. The electrodes with low electrical resistance, large acoustic-impedance mismatch to the piezoelectric layer, and low density are ideal to reduce insertion loss. Based on the research progress, several possible research directions in the AlN-based filters are suggested at the end of the paper.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-023-00104-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140728419","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