AAPPS bulletin

October 2022Vol 32

Research and Review
  • Tuning photoluminescence behaviors in strained monolayer belt-like MoS2 crystals confined on TiO2(001) surface

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

    Abstract 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

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  • Valence skipping phenomena, charge Kondo effect, and superconductivity

    Hiroyasu Matsuura, Hidekazu Mukuda & Kazumasa Miyake

    Abstract We review a recent progress of a superconductivity and a charge Kondo effect mediated by valence skippers which are elements skipping the valence state. To understand the valence skipping phenomenon, we introduce a negative-U effect phenomenologically, and we show an origin of the negative-U effect, a superconductivity and charge Kondo effect based on the negative-U effect. We also show a new mechanism in which the valence skipping phenomenon and charge Kondo effect are understood unif

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  • Computing growth rates of random matrix products via generating functions

    Naranmandula Bao, Junbiao Lu, Ruobing Cai & Yueheng Lan

    Abstract Random matrix products arise in many science and engineering problems. An efficient evaluation of its growth rate is of great interest to researchers in diverse fields. In the current paper, we reformulate this problem with a generating function approach, based on which two analytic methods are proposed to compute the growth rate. The new formalism is demonstrated in a series of examples including an Ising model subject to on-site random magnetic fields, which seems very efficient and

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  • NISQ computing: where are we and where do we go?

    Jonathan Wei Zhong Lau, Kian Hwee Lim, Harshank Shrotriya & Leong Chuan Kwek

    Abstract In this short review article, we aim to provide physicists not working within the quantum computing community a hopefully easy-to-read introduction to the state of the art in the field, with minimal mathematics involved. In particular, we focus on what is termed the Noisy Intermediate Scale Quantum era of quantum computing. We describe how this is increasingly seen to be a distinct phase in the development of quantum computers, heralding an era where we have quantum computers that are

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  • Second sound with ultracold atoms: a brief review

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

    Abstract 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

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  • Topological magnets—their basic science and potential applications

    Satoru Nakatsuji

    Abstract 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 resea

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  • Generalized uncertainty relations for multiple measurements

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

    Abstract 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 measurem

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News and Views
  • Report on the 49th AAPPS Video Council Meeting

    AAPPS

    The 49th Council Meeting of the Association of Asia Pacific Physical Societies (AAPPS) was held online from 3:00 p.m. to 5:38 p.m. (UTC+9hr) on July 28, 2022, via a Zoom session hosted by the Asia Pacific Center for Theoretical Physics (APCTP). The participants were Jun'ichi Yokoyama (president), Hyoung Joon Choi (vice president), Nobuko Naka (secretary), Keun-Young Kim (treasurer), Gui-Lu Long (ex officio member as a former president), and council members Xiu-dong Sun (the Chinese Physical Soc

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  • Report on the 48th AAPPS Video Council Meeting

    AAPPS

    The 48th Council Meeting of the Association of Asia Pacific Physical Societies (AAPPS) was held online from 4:30 p.m. to 6:48 p.m. (UTC+9hr) on May 26, 2022, via a Zoom session hosted by the Asia Pacific Center for Theoretical Physics (APCTP). The participants were Jun'ichi Yokoyama (president), Hyoung Joon Choi (vice president), Nobuko Naka (secretary), Keun-Young Kim (treasurer), Gui-Lu Long (ex officio member as a former president), and council members Tao Xiang (the Chinese Physical Society

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  • Report on the General Relativity and Gravitation (GR23)

    Zong-Kuan Guo

    The 23rd International Conference on General Relativity and Gravitation (GR23) and the 2022 annual meeting of the Division of Gravitation and Relativistic Astrophysics, Chinese Physical Society, were successfully held in Liyang, China, from July 3 to 8, 2022. GR23 was hosted by the Institute of Theoretical Physics, Chinese Academy of Sciences (CAS). Organizational support was provided by Beijing Normal University, Hangzhou Institute for Advanced Study of UCAS, Huazhong University of Science and

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  • The 2022 AAPPS-APCTP C.N. Yang Award

    Rajdeep Singh Rawat

    We are very pleased to announce the three outstanding young scholars who are receiving the 2022 AAPPS-APCTP C.N. Yang Award (C.N. Yang Award): Guancong Ma (Hong Kong Baptist University), Jianwei Wang (Peking University), and Meng-Ru Wu (Academia Sinica). This year, a total of 31 nominations were received; the nominees hailed from 11 different countries and their respective areas of research were represented in 10 distinct sessions of the Asia Pacific Physics Conference (APPC-15) (see Table 1).

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