AAPPS BulletinPub Date : 2025-06-12DOI: 10.1007/s43673-025-00154-w
Sehwa Jeong, Yong Bin Kim, Jae Won Ryu, Hyeonmin Oh, Kyoung-Duck Park
{"title":"Tip-induced dynamic control of exciton-trion interconversion at the nanoscale in two-dimensional semiconductors","authors":"Sehwa Jeong, Yong Bin Kim, Jae Won Ryu, Hyeonmin Oh, Kyoung-Duck Park","doi":"10.1007/s43673-025-00154-w","DOIUrl":"10.1007/s43673-025-00154-w","url":null,"abstract":"<div><p>As two-dimensional (2D) semiconductor devices demand ever higher performance and tunable photo-energy responses, the ability to probe and control exciton-trion interconversion has attracted much attention. However, conventional optical studies predominantly rely on far-field schemes, which suffer from inherent limitations, such as low spatial resolution and weak photoluminescence signals, restricting practical applications. To address these challenges, plasmonic structures have been employed to enhance local electromagnetic fields, facilitating more efficient exciton-trion interconversion in 2D transition metal dichalcogenides. Furthermore, tip-enhanced approaches have expanded the frontiers of excitontrion study by enabling nanoscale spatial resolution and various modulation capabilities, under active cavity configuration. This review article addresses the critical challenge of probing and controlling exciton-trion interconversion. It provides a comprehensive overview of current techniques, spanning far field spectroscopy, plasmonic enhancement, and tip based methodologies, including both foundational strategies and emerging advanced modulation schemes. By summarizing recent developments in this field, this work aims to outline future directions for harnessing photonic quasi particles to advance next-generation optoelectronic and quantum technologies.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00154-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164214","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}
AAPPS BulletinPub Date : 2025-06-05DOI: 10.1007/s43673-025-00153-x
K. Y. Zhang, C. Pan, X. H. Wu, X. Y. Qu, X. X. Lu, G. A. Sun
{"title":"Selected advances in nuclear mass predictions based on covariant density functional theory with continuum effects","authors":"K. Y. Zhang, C. Pan, X. H. Wu, X. Y. Qu, X. X. Lu, G. A. Sun","doi":"10.1007/s43673-025-00153-x","DOIUrl":"10.1007/s43673-025-00153-x","url":null,"abstract":"<div><p>Precision measurements and reliable predictions of nuclear masses are pivotal in advancing nuclear physics and astrophysics. In this paper, we review recent progress in constructing a microscopic nuclear mass table based on the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) that simultaneously incorporates deformation and continuum effects. We present the predictive power and accuracy of the DRHBc mass table, highlighting its diverse applications and extensions. We then introduce the refinement of nuclear mass predictions from the relativistic continuum Hartree-Bogoliubov theory through the kernel ridge regression (KRR) machine learning approach, examining the physical effects encoded in the KRR corrections and the extrapolation distance with reasonable predictions. Finally, we offer a perspective on future improvements to the DRHBc mass table and the continued advancement of nuclear mass predictions.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00153-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162595","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}
AAPPS BulletinPub Date : 2025-05-14DOI: 10.1007/s43673-025-00152-y
Rui-Feng Wang, Can-Li Song, Xu-Cun Ma, Qi-Kun Xue
{"title":"Unveiling high-Tc superconductivity: probing CuO2 planes in infinite-layer cuprates","authors":"Rui-Feng Wang, Can-Li Song, Xu-Cun Ma, Qi-Kun Xue","doi":"10.1007/s43673-025-00152-y","DOIUrl":"10.1007/s43673-025-00152-y","url":null,"abstract":"<div><p>The quest to unravel the intricacies of high-Tc superconductivity and strongly correlated electrons in cuprates has spurred a novel focus on direct probing of the CuO<sub>2</sub> planes through scanning tunneling microscopy. Infinite-layer (IL) cuprates, featuring a CuO<sub>2</sub>-terminated surface, emerge as optimal systems for this investigation. Leveraging controllable growth via molecular beam epitaxy, both electron- and hole-doped IL cuprates are realized, with surface structure and <i>c</i>-axis length serving as distinctive markers. A consistent pattern in the Mott transition is established, revealing that doping merely shifts the Fermi level without inducing changes in the Mott band structure, thereby suggesting a self-modulation doping scenario. Furthermore, the identification of a nodeless superconducting gap in the CuO<sub>2</sub> planes challenges conventional notions derived from charge reservoir layers, advocating for a quantum well interpretation of cuprate superconductivity. This review sheds light on the distinct roles played by CuO<sub>2</sub> layers and charge reservoir layers, promising a more profound comprehension of cuprate superconductivity through the lens of the CuO<sub>2</sub> surface.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00152-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944381","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}
AAPPS BulletinPub Date : 2025-03-31DOI: 10.1007/s43673-025-00149-7
Xia-Ji Liu, Hui Hu
{"title":"Exact calculation of spectral properties of a particle interacting with a one-dimensional Fermi gas in optical lattices","authors":"Xia-Ji Liu, Hui Hu","doi":"10.1007/s43673-025-00149-7","DOIUrl":"10.1007/s43673-025-00149-7","url":null,"abstract":"<div><p>By using the exact Bethe wavefunctions of the one-dimensional Hubbard model with <i>N</i> spin-up fermions and one spin-down impurity, we derive an analytic expression of the impurity form factor, in the form of a determinant of a <span>((N+1))</span> by <span>((N+1))</span> matrix. This analytic expression enables us to exactly calculate spectral properties of one-dimensional Fermi polarons in lattices, when the masses of the impurity particle and the Fermi bath are equal. We present the impurity spectral function as functions of the on-site interaction strength and the filling factor of the Fermi bath, and discuss the origin of Fermi singularities in the spectral function at small momentum and the emergence of polaron quasiparticles at large momentum near the boundary of Brillouin zone. Our analytic expression of the impurity form factors pave the way to exploring the intriguing dynamics of a particle interacting with a Fermi bath. Our exact predictions on the impurity spectral function could be directly examined in cold-atom laboratories by using the radio-frequency spectroscopy and Ramsey spectroscopy.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00149-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740926","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}
AAPPS BulletinPub Date : 2025-03-25DOI: 10.1007/s43673-025-00148-8
Qi Zhou
{"title":"Recovering dark states by non-Hermiticity","authors":"Qi Zhou","doi":"10.1007/s43673-025-00148-8","DOIUrl":"10.1007/s43673-025-00148-8","url":null,"abstract":"<div><p>Dark states, which are incapable of absorbing and emitting light, have been widely applied in multiple disciplines of physics. However, the existence of dark states relies on certain strict constraints on the system. For instance, in the fundamental <span>(Lambda)</span> system, a perturbation breaking the degeneracy between two energy levels may destroy the destructive interference and demolish the dark state. Here, we show that non-Hermiticity can be exploited as a constructive means to restore a dark state. By compensating for the undesired perturbations, non-Hermiticity produces unidirectional couplings such that the dark state remains decoupled from the rest of the system. Implementing this scheme in many-body systems, flat bands and edge states can be recovered by losses and gains. Further taking into account interactions, a range of novel quantum phases could arise in such non-Hermitian systems.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00148-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688391","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}
AAPPS BulletinPub Date : 2025-03-24DOI: 10.1007/s43673-025-00147-9
Gwanghui Ha
{"title":"Recent developments in phase space correlation control for charged-particle beams toward achieving arbitrary correlations","authors":"Gwanghui Ha","doi":"10.1007/s43673-025-00147-9","DOIUrl":"10.1007/s43673-025-00147-9","url":null,"abstract":"<div><p>Particle accelerators, originally developed to address fundamental questions about the universe, have become essential to various scientific disciplines. The broad adoption of accelerators was enabled by substantial advancements in beam manipulation techniques, which encompass methods for generating and controlling particle beams to optimize them for specific applications. Most of these manipulations rely on controlling the beam’s correlation in its phase space. While linear control and the correction of low-order nonlinearities have propelled particle accelerators to their current state, the exploration of more advanced control methods may provide new opportunities to achieve unprecedented beam qualities and conditions. Consequently, there is an increasing demand for control over higher-order nonlinearities. A recently developed method utilizing transverse wigglers shows potential in addressing such demands. Active research is also ongoing on diverse applications of the transverse wiggler-based method in various accelerator fields. This paper discusses methods for controlling highly nonlinear correlations and their applications.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00147-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676402","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}
AAPPS BulletinPub Date : 2025-03-13DOI: 10.1007/s43673-025-00146-w
Young Dae Yoon
{"title":"The canonical vorticity framework and its applications in collisionless, magnetized plasma physics","authors":"Young Dae Yoon","doi":"10.1007/s43673-025-00146-w","DOIUrl":"10.1007/s43673-025-00146-w","url":null,"abstract":"<div><p>I briefly review the canonical vorticity theoretical framework and its applications in collisionless, magnetized plasma physics. The canonical vorticity is a weighted sum of the fluid vorticity and the magnetic field and is equal to the curl of the canonical momentum. By taking this variable as the primary variable instead of the magnetic field, various phenomena that require non-MHD effect in their scrutiny can be simplified. Two examples are given, namely magnetic reconnection and magnetogenesis, and exactly how the canonical vorticity framework simplifies their analyses is described. Suggestions for future work are also delineated.</p></div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-025-00146-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612189","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}