AAPPS Bulletin最新文献_第9页

Computing growth rates of random matrix products via generating functions 通过生成函数计算随机矩阵乘积的增长率

AAPPS Bulletin Pub Date : 2022-09-22 DOI: 10.1007/s43673-022-00057-0

Naranmandula Bao, Junbiao Lu, Ruobing Cai, Yueheng Lan

引用次数: 0

Tuning photoluminescence behaviors in strained monolayer belt-like MoS2 crystals confined on TiO2(001) surface 限制在 TiO2（001）表面的应变单层带状 MoS2 晶体的调谐光致发光行为

AAPPS Bulletin Pub Date : 2022-09-21 DOI: 10.1007/s43673-022-00059-y

Yuanye Wang, Jun Zhou, Yalin Liu, Weifeng Zhang, Zihan Zhao, Xiaotian Li, Qiaoni Chen, Nan Liu, Xi Shen, Richeng Yu, Jiacai Nie, Ruifen Dou

{"title":"Tuning photoluminescence behaviors in strained monolayer belt-like MoS2 crystals confined on TiO2(001) surface","authors":"Yuanye Wang, Jun Zhou, Yalin Liu, Weifeng Zhang, Zihan Zhao, Xiaotian Li, Qiaoni Chen, Nan Liu, Xi Shen, Richeng Yu, Jiacai Nie, Ruifen Dou","doi":"10.1007/s43673-022-00059-y","DOIUrl":"10.1007/s43673-022-00059-y","url":null,"abstract":"<div>We report on a monolayer (ML) MoS2 belt-like single crystal directly fabricated on the Rutile-TiO2(001) surface via chemical vapor deposition (CVD). We find that the photoluminescence (PL) behaviors in the ML MoS2 single crystal strongly depend on their shapes and the interface of MoS2/TiO2. Compared with the as-grown triangular ML MoS2, the PL peak position is in a blue shift and the PL intensity is increased for the as-grown ML MoS2 belt. Moreover, the PL peak position is in the blue shift by about 38 meV and the intensity is enhanced by nearly 15 times for the as-grown ML MoS2 belt crystal on TiO2 than those samples transferred onto SiO2/Si substrate. This special PL behavior can be attributed to the in-plane compressive strain that is introduced during the CVD growth of ML MoS2 belts confined by the substrate. The energy band of the strained ML MoS2 belt is changed with an up-shift in the conduction band minimum (VBM) and a down-shift in the valence band maximum (CBM), and the band gap is thus enlarged. This results in the energy band structural realignment in the interface of MoS2/TiO2, thereby weakening the charge transferring from the TiO2 substrate to MoS2 and suppressing the concentration of charged excitons to finally enhance the PL intensity of the ML MoS2 belt. The substrate-confined ML MoS2 belts provide a new route for tailoring light-matter interactions to upgrade their weak quantum yields and low light absorption, which can be utilized in optoelectronic and nanophotonic devices.</div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-022-00059-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87482367","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: Time reversal and reciprocity 更正：时间逆转和互惠

AAPPS Bulletin Pub Date : 2022-09-06 DOI: 10.1007/s43673-022-00060-5

Olivier Sigwarth, Christian Miniatura

引用次数: 0

Second sound with ultracold atoms: a brief review 超冷原子的第二声：简要回顾

AAPPS Bulletin Pub Date : 2022-09-01 DOI: 10.1007/s43673-022-00055-2

Hui Hu, Xing-Can Yao, Xia-Ji Liu

{"title":"Second sound with ultracold atoms: a brief review","authors":"Hui Hu, Xing-Can Yao, Xia-Ji Liu","doi":"10.1007/s43673-022-00055-2","DOIUrl":"10.1007/s43673-022-00055-2","url":null,"abstract":"<div>We briefly review the research on second sound in ultracold atomic physics, with emphasis on strongly interacting unitary Fermi gases with infinitely large s-wave scattering length. Second sound is a smoking-gun feature of superfluidity in any quantum superfluids. The observation and characterization of second sound in ultracold quantum gases have been a long-standing challenge, and in recent years, there are rapid developments due to the experimental realization of a uniform box-trap potential. The purpose of this review is to present a brief historical account of the key research activities on second sound over the past two decades. We summarize the initial theoretical works that reveal the characteristics of second sound in a unitary Fermi gas, and introduce its first observation in a highly elongated harmonic trap. We then discuss the most recent measurement on second sound attenuation in a uniform setup, which may open a new era to understand quantum transport near quantum criticality in the strongly interacting regime. The observation of second sound in homogeneous weakly interacting Bose condensates in both two and three dimensions are also briefly introduced.</div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-022-00055-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81917564","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

Topological magnets—their basic science and potential applications 拓扑磁体--其基础科学和潜在应用

AAPPS Bulletin Pub Date : 2022-08-19 DOI: 10.1007/s43673-022-00046-3

Satoru Nakatsuji

{"title":"Topological magnets—their basic science and potential applications","authors":"Satoru Nakatsuji","doi":"10.1007/s43673-022-00046-3","DOIUrl":"10.1007/s43673-022-00046-3","url":null,"abstract":"<div>The performance limitations of conventional electronic materials pose a major problem in the era of digital transformation (DX). Consequently, extensive research is being conducted on the development of quantum materials that may overcome such limitations, by utilizing quantum effects to achieve remarkable performances. In particular, considerable progress has been made on the fundamental theories of topological magnets and has had a widespread impact on related fields of applied research. An important advance in the field of quantum manipulation is the development of the technology to control the quantum phase of conduction electron wavefunctions through the spin structure. This new technology has led to the realization of phenomena that had been considered infeasible for more than a century, such as the anomalous Hall effect in antiferromagnets and the giant magneto-thermoelectric effect in ferromagnets. This review article presents the remarkable properties of Weyl antiferromagnets and topological ferromagnets, which have been discovered recently. Additionally, this paper examines the current status of how advances in the basic principles of topological magnetism are facilitating the development of next-generation technologies that support the DX era, such as energy harvesting, heat flow sensors, and ultrafast nonvolatile memory.</div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-022-00046-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73049348","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

Generalized uncertainty relations for multiple measurements 多重测量的广义不确定度关系

AAPPS Bulletin Pub Date : 2022-08-15 DOI: 10.1007/s43673-022-00054-3

Lin Wu, Xue-Ke Song, Liu Ye, Dong Wang

{"title":"Generalized uncertainty relations for multiple measurements","authors":"Lin Wu, Xue-Ke Song, Liu Ye, Dong Wang","doi":"10.1007/s43673-022-00054-3","DOIUrl":"10.1007/s43673-022-00054-3","url":null,"abstract":"<div>The uncertainty relation is regarded as a remarkable feature of quantum mechanics differing from the classical counterpart, and it plays a backbone role in the region of quantum information theory. In principle, the uncertainty relation offers a nontrivial limit to predict the outcome of arbitrarily incompatible observed variables. Therefore, to pursue a more general uncertainty relations ought to be considerably important for obtaining accurate predictions of multi-observable measurement results in genuine multipartite systems. In this article, we derive a generalized entropic uncertainty relation (EUR) for multi-measurement in a multipartite framework. It is proved that the bound we proposed is stronger than the one derived from Renes et al. in [Phys. Rev. Lett. 103,020402(2009) ] for the arbitrary multipartite case. As an illustration, we take several typical scenarios that confirm that our proposed bound outperforms that presented by Renes et al. Hence, we believe our findings provide generalized uncertainty relations with regard to multi-measurement setting, and facilitate the EUR’s applications on quantum precision measurement regarding genuine multipartite systems.</div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-022-00054-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72845743","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

Time reversal and reciprocity 时间逆转和互惠

AAPPS Bulletin Pub Date : 2022-08-03 DOI: 10.1007/s43673-022-00053-4

Olivier Sigwarth, Christian Miniatura

引用次数: 0

Constraining active-sterile neutrino mixing via lepton flavor violating decays of mesons 通过介子的轻子味道违反衰变来约束主动-轻子中微子混合

AAPPS Bulletin Pub Date : 2022-08-01 DOI: 10.1007/s43673-022-00051-6

Shiyong Hu, Sam Ming-Yin Wong, Fanrong Xu

{"title":"Constraining active-sterile neutrino mixing via lepton flavor violating decays of mesons","authors":"Shiyong Hu, Sam Ming-Yin Wong, Fanrong Xu","doi":"10.1007/s43673-022-00051-6","DOIUrl":"10.1007/s43673-022-00051-6","url":null,"abstract":"<div>As a hypothetic particle, a sterile neutrino can exist in types of new physics models. In this work by investigating flavor violating semileptonic and leptonic decays of K,D, and B mesons induced by the GeV scale sterile neutrino, we explore its allowed regions in parameter space. Analytically, we derive branching fractions of semileptonic decay (M^{+}_{h}to M_{l}^{+}ell _{1}^{+}ell _{2}^{-}) and leptonic decay (M^{0}to ell _{1}^{-}ell _{2}^{+}), including the contribution from a new box diagram contribution due to the massive sterile neutrino. Imposing its mass ranges, we numerically analyze the active-sterile neutrino mixings in corresponding regions. We find that when the sterile neutrino mass is located in between pion and kaon mass, K+→π+e±μ∓ gives the strongest constraint while B+→π+e±μ∓ provides the dominated constraint when its mass in between of kaon and B meson. If the sterile neutrino is even heavier than Bmesons, the LHCb (B^{0}_{s}to mu ^{pm } e^{mp }) results gives the strongest constraint.</div>","PeriodicalId":100007,"journal":{"name":"AAPPS Bulletin","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43673-022-00051-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80952980","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 : 2022-07-26 DOI: 10.1007/s43673-022-00052-5

AAPPS Bulletin

引用次数: 0

Understanding the Mott insulating state in 1T-TaS2 and 1T-TaSe2 了解 1T-TaS2 和 1T-TaSe2 中的莫特绝缘态

AAPPS Bulletin Pub Date : 2022-07-19 DOI: 10.1007/s43673-022-00049-0

Ying Fei, Zongxiu Wu, Wenhao Zhang, Yi Yin

引用次数: 0