AAPPS bulletin

August 2024Vol 34

Research and Review
  • Progress in acoustic measurements and geoacoustic applications

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

    Abstract 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

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  • Encircling the Liouvillian exceptional points: a brief review

    Konghao Sun & Wei Yi

    Abstract 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 p

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  • Density functional theory study of two-dimensional hybrid organic-inorganic perovskites: frontier level alignment and chirality-induced spin splitting

    Ruyi Song & Rundong Zhao

    Abstract 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 in

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  • Environment-induced information scrambling transition with charge conservations

    Pengfei Zhang & Zhenhua Yu

    Abstract 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 tra

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Research Highlights
  • High-capacity device-independent quantum secure direct communication protocol using hyper-entanglement

    Gui-Lu Long

    1 High-capacity device-independent quantum secure direct communication protocol using hyper-entanglement by Gui-Lu Long Quantum secure direct communication (QSDC) is an innovative quantum communication paradigm that transmits information directly using quantum states. First proposed in 2000 [1], QSDC has evolved over more than two decades [2]. Before Bennett and Brassard invented the first quantum key distribution (QKD) protocol, they initially studied QSDC. Unfortunately, their submission was

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News and Views
  • First Asian Physics Olympiad in Malaysia

    Pua Chang Hong from IFM (Institut Fizik Malaysia)

    4 First Asian Physics Olympiad in Malaysia by Pua Chang Hong from IFM (Institut Fizik Malaysia) The Asian Physics Olympiad 2024 (APhO 2024) was successfully held in Kampar, Perak, Malaysia, from June 3 to 10, 2024. Kampar, a historic town in the state of Perak, provided a unique and picturesque setting for the Olympiad. This was the first time Malaysia hosted the Physics Olympiad, or any international Science Olympiad. The event was organized by Universiti Tunku Abdul Rahman (UTAR) and attracte

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  • Qi-Kun Xue receives the 2023 State Preeminent Science and Technology Award, China’s top scientific honor

    Ke He and Xu-Cun Ma

    3 Qi-Kun Xue receives the 2023 State Preeminent Science and Technology Award, China’s top scientific honor by Ke He and Xu-Cun Ma The 2023 National Science and Technology Award Conference was held in Beijing on June 24, 2024. The 2023 State Preeminent Science and Technology Award, China’s top scientific honor, was granted to Academician Qi-Kun Xue for his outstanding contribution to scientific and technological innovation. Moreover, Qi-Kun Xue is the first Chinese national to win the Fritz Lond

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  • CosPA 2024

    Yungui Gong

    2 CosPA 2024 by Yungui Gong The community in astrophysics, cosmology, and gravitation has anticipated onsite conferences/workshops since the restrictions associated with COVID-19 pandemic ended. The International Symposium on Cosmology and Particle Astrophysics (CosPA), which is typically held annually, is steered by the Asia Pacific CosPA Organization (AP CosPA Org.), supported by the Asia Pacific Center for Theoretical Physics (APCTP), and is the main activity endorsed by the Division of Astr

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