Article
Physics, Multidisciplinary
Ren Zhang, Yangqian Yan, Qi Zhou
Summary: Hall ribbons and Hall cylinders, fundamental theoretical tools in condensed matter physics, have been successfully synthesized in laboratories through engineering laser-atom interactions. Converting a synthetic Hall ribbon into a synthetic Hall cylinder can naturally lead to localization, with physical observables strongly dependent on the axial magnetic flux near localization-delocalization transitions. In the irrational limit, physical observables are no longer affected by the axial flux, providing a scheme to suppress decoherence induced by fluctuations of the axial flux.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Jeong Ho Han, Dalmin Bae, Y. Shin
Summary: This study describes a synthetic three-leg Hall ladder system with a tunable magnetic flux for neutral Yb-173 atoms in a one-dimensional optical lattice. The controllable magnetic flux is achieved through Raman couplings between spin states, and the quench dynamics of the system were investigated under various interleg link configurations, showing substantial damping in certain cases.
Article
Astronomy & Astrophysics
Jerome Martin, Vincent Vennin
Summary: This study introduces a new method for analytically determining the entanglement entropy between configurations of a quantum field at two distinct spatial locations, utilizing a bipartite, continuous Gaussian system. The method allows for deriving explicit formulas solely in terms of the Fourier-space power spectra of the field. This contrasts with previous studies relying on numerical considerations and leads to the first analytical derivation of results such as the decay of mutual information at large distances.
Article
Physics, Applied
Zhen Wang, Shiyuan Liu, Peilong Yuan, Xiaodong Xu
Summary: In this Letter, a bilayer elastic C-6v structure is proposed and used to manipulate two topological nontrivial valley pseudo-spin states. The transmission and prohibition of the elastic valley pseudo-spin states, as well as the tunneling between layers, can be flexibly controlled due to the interlayer polarization and mixing effects in the structure. The experimental results confirm the high transmission efficiency of elastic valley pseudo-spin states across layers, reaching 93%. This research expands and enriches the understanding of valley pseudo-spin states in the elastic environment and lays the foundation for the design of elastic topological devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Benoit Sirois, Lucie Maude Fournier, Julien Leduc, William Witczak-Krempa
Summary: The study examines the quantum entanglement structure of integer quantum Hall states through the reduced density matrix of spatial subregions. It reveals geometric angle-dependent contributions and nearly identical angle dependencies to numerous conformal field theories (CFTs). Additionally, excitations localized near corners are observed in the low-lying entanglement spectrum.
Article
Materials Science, Multidisciplinary
Xiaofan Zhou, Jian-Song Pan, Suotang Jia
Summary: We investigated the many-body topological physics of interacting fermions in an extended Su-Schrieffer-Heeger (SSH) model using the density-matrix renormalization-group numerical method. The interaction-driven phase transition from the topological insulator phase to the charge density wave (CDW) phase was identified by analyzing various properties. The global phase diagram was mapped, showing nontrivial topological insulator, trivial insulator, and CDW phases. The phase transitions between the CDW phase and topologically trivial or nontrivial phases were found to be continuous, contrary to the first-order phase transitions in the interacting SSH model. The phase diagram of the interacting spinful SSH4 model with attractive or repulsive on-site spin interaction was also presented.
Article
Physics, Multidisciplinary
Dan Ye, Yi Yang, Qi Li, Zi-Xiang Hu
Summary: In this study, the geometric and edge contributions in the integer quantum Hall (IQH) state and its edge reconstruction are simultaneously explored using a unified bipartite method. The scaling of these contributions is found to be consistent with conformal field theory (CFT) predictions and recent results of particle number fluctuation calculations.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
I. M. Flor, A. Lacerda-Santos, G. Fleury, P. Roulleau, X. Waintal
Summary: Recent experiments have shown that electronic Mach-Zehnder interferometers of unprecedented fidelities could be built using a graphene pn junction in the quantum Hall regime. The separation between two different edge states in the junction is abnormally high and is independent of the exchange splitting value, being governed entirely by the sample geometry.
Article
Physics, Multidisciplinary
Giuliano Angelone, Manuel Asorey, Paolo Facchi, Davide Lonigro, Yisely Martinez
Summary: We propose a self-consistent model for the integer quantum Hall effect on an infinite strip and investigate the influence of finite-size effects on the Hall conductivity using boundary conditions. By exploiting translation symmetry, we determine the spectral properties of the system for a class of boundary conditions and the full spectrum for Robin boundary conditions. Our model reveals the existence of new states with no classical analogues and adds finer structure to the quantization pattern of the Hall conductivity. Additionally, we predict the breakdown of the quantum Hall effect at high values of the applied electric field.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Multidisciplinary
Benoit Estienne, Blagoje Oblak, Jean-Marie Stephan
Summary: The gapless modes on the edge of 4D quantum Hall droplets exhibit anisotropic behavior, with commensurable trapping frequencies leading to periodic trajectories and incommensurable frequencies producing quasi-periodic, ergodic trajectories with fractal correlation features. This highlights the sharp differences between 4D and 2D Hall droplets and demonstrates the dependence of 4D edge modes on the choice of trap, suggesting observable bifurcations due to droplet deformations.
Article
Physics, Multidisciplinary
Yun-tuan Fang, Ping Gong, Sailing He
Summary: In this paper, we construct a triangular compound lattice composed of magnetic dielectric rods. By breaking space symmetry and time-reversal symmetry, the structure generates topological edge states from the hybrid quantum Hall effects and valley Hall effects. This topological edge waveguide pathway can be arbitrarily arranged using an external magnetic field. The hybrid topological phase provides a new and highly flexible method for the reconfiguration of the topological edge states.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Xuguang Wang, Daiyu Geng, Dayu Yan, Wenqi Hu, Hexu Zhang, Shaosheng Yue, Zhenyu Sun, Shiv Kumar, Eike F. Schwier, Kenya Shimada, Peng Cheng, Lan Chen, Simin Nie, Zhijun Wang, Youguo Shi, Yi-Qi Zhang, Kehui Wu, Baojie Feng
Summary: Experimental evidence of a 2DTI in the van der Waals material Ta2Pd3Te5 has been reported, showing that each monolayer is a 2DTI with weak interlayer interactions. Measurements confirm the existence of a band gap at the Fermi level and topological edge states inside the gap, making Ta2Pd3Te5 a promising material for fabricating spintronic devices based on the QSH effect.
Article
Materials Science, Multidisciplinary
F. A. Palm, S. Mardazad, A. Bohrdt, U. Schollwoeck, F. Grusdt
Summary: Experimental realizations of topologically ordered states of matter, such as fractional quantum Hall states, with cold atoms are now within reach. Optical lattices provide a promising platform for the realization and characterization of such states, where novel detection schemes enable an unprecedented microscopic understanding.
Article
Materials Science, Multidisciplinary
Fengjun Zhuo, Hang Li, Aurelien Manchon
Summary: Investigated phase transitions between topological magnon phases with lattice deformation-induced Dzyaloshinskii-Moriya interaction, and calculated magnonic Chern number, topological phase diagram, and magnon thermal Hall conductivity at low temperature. Found that modulated exchange interactions affect band topology of magnons, and observed sign reversal of thermal Hall conductivity during topological phase transitions, explained by topological edge modes and their propagation directions. Discussions on candidate materials for realization.
Article
Multidisciplinary Sciences
Cheng Chi, Qiao Jiang, Zhixin Liu, Liheng Zheng, Meiling Jiang, Han Zhang, Feng Lin, Bo Shen, Zheyu Fang
Summary: The study demonstrates selective manipulation of photon spin angular momentum at a deep subwavelength scale via electron-induced OSHE in Au nanoantennas, suggesting an information encoding scheme with robustness, privacy, and high level of integration for future quantum applications.