Results 71 to 80 of about 906,607 (253)

New High‐Tc Charge‐Transfer Multiferroicity in the Quasi‐2D Antiferromagnet CrSbS3

Advanced Science, EarlyView.
ABSTRACT Low‐dimensional magnets, particularly 2D systems, offer a rich platform for realizing unconventional multiferroic mechanisms, especially when multiple polarization channels coexist. In the quasi‐2D antiferromagnet CrSbS3, which crystallizes in the centrosymmetric orthorhombic space group Pnma and orders magnetically at TN ≈ 90 K, two ...
Hung‐Cheng Wu, Yu‐Hsin Liao, Chih‐Chung Tsai, Pei‐Ying Yang, Yu‐Hao Chang, Yu‐Hui Liang, D. Chandrasekhar Kakarla, Ajay Tiwari, C. Dhanasekhar, Chin‐Wei Wang, Daisuke Okuyama, Chia‐Nung Kuo, Chin‐Shan Lue, Tzu‐Hsuan Weng, Kung‐Hsuan Lin, Jau‐Wern Chiou, Chi‐Hung Lee, Hung‐Duen Yang   +17 more
wiley   +1 more source

Holographic excited states in AdS black holes

Journal of High Energy Physics, 2019
We have recently presented a geometry dual to a Schwinger-Keldysh closed time contour, with two equal β/2 length Euclidean sections, which can be thought of as dual to the Thermo Field Dynamics formulation of the boundary CFT.
Marcelo Botta-Cantcheff, Pedro J. Martínez, Guillermo A. Silva   +2 more
doaj   +1 more source

Null reductions of the M5-brane

Journal of High Energy Physics, 2020
We perform a general reduction of an M5-brane on a spacetime that admits a null Killing vector, including couplings to background 4-form fluxes and possible twisting of the normal bundle.
Neil Lambert, Tristan Orchard
doaj   +1 more source

Physics‐Aware Machine‐Learning‐Driven Inverse Design of Broadband Ultra‐Open Acoustic Metamaterials

Advanced Science, EarlyView.
A physics‐aware machine‐learning framework enables inverse design of ultra‐open acoustic silencers by decoupling spectral and radial design spaces. The approach rapidly identifies broadband, compact, and highly ventilated architectures, while revealing hidden linear design rules that link geometry, impedance matching, and acoustic performance.
Zhiwei Yang, Mengyu Li, Xiaohang Xie, Ao Chen, Thomas G. Bifano, Xin Zhang   +5 more
wiley   +1 more source

Traversable wormhole for string, but not for particle

Physics Letters B
We propose a Lorentzian wormhole geometry characterized by a closed string massless sector with nontrivial H-flux and a scalar dilaton. In the string frame, the dilaton exhibits a negative kinetic term, enabling the existence of the wormhole.
Hun Jang, Minkyoo Kim, Hocheol Lee, Jeong-Hyuck Park   +3 more
doaj   +1 more source

High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure

Advanced Science, EarlyView.
External pressure directly tunes the breathing distortion of the kagome lattice in Fe3Sn2, suppressing it near 15 GPa and reversing it at higher pressures. This structural modulation drives a cascade of Lifshitz transitions, reconstructs the Fermi surface, strengthens electronic correlations and carrier localization, and modifies ultrafast electron ...
Marcos Vinicius Gonçalves‐Faria, Maxim Wenzel, Yuk Tai Chan, Olga Iakutkina, Francesco Capitani, Davide Comboni, Michael Hanfland, Qi Wang, Hechang Lei, Martin Dressel, Alexander A. Tsirlin, Alexej Pashkin, Stephan Winnerl, Manfred Helm, Ece Uykur   +14 more
wiley   +1 more source

On a problem of Osserman in Lorentzian geometry

, 1997
A problem of Osserman on the constancy of the eigenvalues of the Jacobi operator is studied in Lorentzian geometry. Attention is paid to the different cases of timelike, spacelike and null Osserman condition.
Kupeli, DN, VazquezAbal, ME, M.E Vázquez-Abal, D.N Kupeli, GarciaRio, E, E García-Río   +5 more
core   +1 more source

Efficient Cholesteric Liquid Crystal Waveguide Polarizing Splitters for High‐Sensitivity Chip‐Scale Atomic Magnetometry

Advanced Science, EarlyView.
An integrated polarimetry architecture based on a cholesteric liquid crystal waveguide polarization splitter overcomes the volumetric bottleneck in chip‐scale atomic magnetometers. By leveraging Bragg‐selective reflection and total‐internal‐reflection‐induced helicity inversion, this ultrathin device enables efficient circular polarization splitting ...
Zhibo Cui, Chuang Wang, Xiangyang Zhou, Gaopu Hou, Jinsheng Hu, Mao Ye, Xu Xiao, Zhen Chai, Yishi Weng, Yuning Zhang   +9 more
wiley   +1 more source

Heterotic string sigma models: discrete light cone quantization and its current-current deformation

Journal of High Energy Physics
We propose a two-dimensional superstring sigma model that defines a self-contained corner of heterotic string theory, whose second quantization is heterotic matrix string theory.
Eric A. Bergshoeff, Kevin T. Grosvenor, Luca Romano, Ziqi Yan   +3 more
doaj   +1 more source

Invariant Submanifolds of Lorentzian β-Kenmotsu Manifold According to a Generalized $\mathcal{B}$-Curvature Tensor

Mathematics
The purpose of this research paper is to analyze the invariant submanifolds of Lorentzian β-Kenmotsu manifolds. With respect to the generalized B-curvature tensor defined on a Lorentzian β-Kenmotsu manifold, we examine the geometry of invariant ...
Ibrahim Al-Dayel, Mohd Danish Siddiqi, Tuğba Mert   +2 more
doaj   +1 more source