Article
Physics, Multidisciplinary
Guoqiang Xu, Xue Zhou, Ying Li, Qitao Cao, Weijin Chen, Yunfeng Xiao, Lan Yang, Cheng-Wei Qiu
Summary: This study reports the first discovery of chiral heat transport, which is only manifested in the vicinity of exceptional point (EP) and exhibits significant robustness. The results reveal the chirality in heat transport process and provide a novel strategy for manipulating mass, charge, and diffusive light.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Huimin Zhang, Basu Dev Oli, Qiang Zou, Xu Guo, Zhengfei Wang, Lian Li
Summary: In FeSn, we observe the symemtry-breaking and tunable electronic orders in the Kagome lattice by applying a magnetic field, providing a new avenue for studying the unique quantum states in Kagome lattice.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shiming Lei, Samuel M. L. Teicher, Andreas Topp, Kehan Cai, Jingjing Lin, Guangming Cheng, Tyger H. Salters, Fanny Rodolakis, Jessica L. McChesney, Saul Lapidus, Nan Yao, Maxim Krivenkov, Dmitry Marchenko, Andrei Varykhalov, Christian R. Ast, Roberto Car, Jennifer Cano, Maia G. Vergniory, N. Phuan Ong, Leslie M. Schoop
Summary: New developments in the field of topological matter are often driven by materials discovery, but many topological materials still suffer from non-ideal band structures. Introducing a new mechanism to design ideal Dirac semimetals, the nearly ideal Dirac semimetal GdSb0.46Te1.48 exhibits highly unusual transport behavior.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hao Tang, Yong Li, Junyao Yin, Juekuan Yang, Dongyan Xu, Deyu Li
Summary: We report on diverse transport properties observed in NbSe3 nanowires of dilute Ni concentrations, including metallic behavior with negative absolute resistance, switching transition, and metal-insulator transitions. The resistance of nonmetallic samples follows power laws, but the anomalous features of charge density wave transitions are still present. These transport behaviors are apparently caused by variations of potential along the conducting channel due to different kinds of nonuniformities.
MATERIALS TODAY PHYSICS
(2022)
Article
Optics
Jinlei Tan, Xunwei Xu, Jing Lu, Lan Zhou
Summary: This study explores the coherent transport of one or two photons in a one-dimensional waveguide chirally coupled to a nonlinear resonator. Analytic solutions for one-photon and two-photon scattering are derived, revealing the non-reciprocal properties of light transmission at the two-photon level.
Article
Astronomy & Astrophysics
Daiki Suenaga, Yasufumi Araki, Kei Suzuki, Shigehiro Yasui
Summary: The study reveals that the Kondo effect can catalyze the chiral separation effect in quark matter, with an enhancement observed particularly in the dynamical limit. The presence of heavy impurities plays a crucial role in the transport phenomena of light quarks induced by a magnetic field.
Article
Chemistry, Multidisciplinary
Ziying Wang, Zishen Wang, Yuan Ping Feng, Kian Ping Loh
Summary: Chirality plays a crucial role in spontaneous symmetry breaking and has a profound impact on the topology, charge, and spin orders of materials. This study reports the observation of predominantly chiral charge density wave (CDW) phase in two-dimensional H-phase TaS2 synthesized by molecular-beam epitaxy (MBE). Scanning tunneling microscopy (STM) imaging and first-principles calculations reveal the chirality origin in the CDW phase. This work provides new insights into the physical origin of chiral charge-ordered states and sheds light on a general ordering rule in chiral CDWs.
Article
Optics
Konghao Sun, Wei Yi
Summary: Exceptional points in non-Hermitian systems exhibit rich critical behaviors, such as the chiral state transfer where states can swap under an adiabatic encircling. However, in dissipative quantum systems, dephasing can limit chiral state transfer even in the adiabatic limit. In this study, we examine the effects of dephasing on encircling dynamics and find that chirality is restored at intermediate encircling times.
Article
Physics, Multidisciplinary
Bo Liu, Min-Quan Kuang, Yang Luo, Yongkai Li, Cheng Hu, Jiarui Liu, Qian Xiao, Xiquan Zheng, Linwei Huai, Shuting Peng, Zhiyuan Wei, Jianchang Shen, Bingqian Wang, Yu Miao, Xiupeng Sun, Zhipeng Ou, Shengtao Cui, Zhe Sun, Makoto Hashimoto, Donghui Lu, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Luca Moreschini, Alessandra Lanzara, Yao Wang, Yingying Peng, Yugui Yao, Zhiwei Wang, Junfeng He
Summary: In the bismuth-based kagome metal CsTi3Bi5, the electronic instability can be investigated by tuning the van Hove singularity (vHS), which is different from other kagome metals like CsV3Sb5.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Debsuvra Mukhopadhyay, Jayakrishnan M. P. Nair, Girish S. Agarwal
Summary: This paper proposes an anti-PT symmetric converter that takes advantage of the intrinsic dissipation of systems into a shared reservoir to introduce coherence between two systems, leading to significant improvements in conversion efficiency. The study also finds considerable asymmetry in the efficiencies of microwave-to-optical and optical-to-microwave conversions, which is attributed to the inherent asymmetry in the couplings of the microwave and optical fields and the spatial separation.
Article
Materials Science, Multidisciplinary
Dali Cheng, Bo Peng, Meng Xiao, Xianfeng Chen, Luqi Yuan, Shanhui Fan
Summary: The study demonstrates that edge states can remain in the PT-unbroken phase under certain symmetries of the bulk lattice, but edge states with complex eigen-energies may appear when these symmetries are removed, even for infinitesimal non-Hermitian onsite potentials.
Article
Physics, Multidisciplinary
Ivor Kresic, Konstantinos G. Makris, Ulf Leonhardt, Stefan Rotter
Summary: This paper discusses the application of coordinate transformations in optics, focusing on the connection between nonconformal transformations and non-Hermitian materials to achieve a range of important phenomena. The research findings contribute to the design of novel optical materials and reducing material requirements.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Gabriel Schnoering, Samuel Albert, Antoine Canaguier-Durand, Cyriaque Genet
Summary: The study investigates the dynamics and energetics of overdamped Brownian chiral nanoparticles diffusing in symmetric bistable optical potentials, created by controlling the polarizations of two counterpropagating Gaussian beams. The chiral densities and fluxes in the optical environment exert reactive or dissipative chiral forces on the nanoparticles, leading to modifications in the thermal activation process depending on enantiomer type and optical field enantiomorphism. This optomechanical chiral coupling results in changes to the Helmholtz free energy and asymmetric barrier-crossing rates, unveiling new opportunities for chiral sensing and discrimination at the nanoscale.
Article
Astronomy & Astrophysics
Micha L. Marczenko, Krzysztof Redlich, Chihiro Sasaki
Summary: We examine the oscillations of the density of net-baryon number in dense hadronic matter. Chiral dynamics is simulated using the parity doublet Lagrangian, and the mean-field approximation is employed to capture chiral criticality. We focus on the properties and patterns of the second-order susceptibility of the net-baryon number density for positive and negative-parity nucleons. The results show that the second-order susceptibility of the positive-parity state can become negative when chiral symmetry is restored, indicating proximity to the critical point on the chiral phase boundary. This has potential implications for interpreting experimental data on net-proton fluctuations in heavy-ion collisions.
Article
Multidisciplinary Sciences
Xilin Feng, Kun Jiang, Ziqiang Wang, Jiangping Hu
Summary: The study identifies a chiral flux phase in the quasi-2D Kagome superconductor AV(3)Sb(5), which has the lowest energy and exhibits 2 x 2 charge orders observed experimentally. This phase breaks time-reversal symmetry and displays anomalous Hall effect.
Article
Physics, Multidisciplinary
Ana Silva, Jasper van Wezel
Summary: The correspondence between the bulk topological invariant and the number of topologically protected edge modes in topological insulators has been well-tested for strong topological invariants and also holds for weak topological invariants dependent on atomic lattice symmetries. Interface modes localized at the junction between two inversion-symmetric band insulators with trivial strong invariants are predicted by symmetry-based classifications of topological materials. These protected interface modes can be utilized for topological transport and signal manipulation in heterojunction-based devices.
Article
Chemistry, Multidisciplinary
Rebekah Chua, Jans Henke, Surabhi Saha, Yuli Huang, Jian Gou, Xiaoyue He, Tanmoy Das, Jasper van Wezel, Anjan Soumyanarayanan, Andrew T. S. Wee
Summary: Thinning crystalline materials to two dimensions leads to a variety of electronic phases, but the confinement of charge order to only 2D remains challenging. By studying monolayer VSe2, two CDWs with distinct origins were discovered, highlighting the importance of emergent interactions in 2D materials.
Article
Physics, Applied
Mariya A. Lizunova, Jasper Kager, Stan de Lange, Jasper van Wezel
Summary: The phi(4)-theory serves as a low-energy effective description in physics, describing stable, particle-like excitations known as topological defects or kinks. When interacting with various types of realistic impurity models, these realistic impurities behave qualitatively similarly to idealized delta function impurities, but show significant quantitative differences in localized impurity modes and collision dynamics. A particular regime of kink-impurity interactions is identified, where kinks lose all kinetic energy upon colliding with an impurity.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Physics, Multidisciplinary
Jasper van Wezel
Summary: In this article, a series of symmetry arguments are presented, suggesting that under unitary time evolution, it is forbidden to determine a global choice for the ordered state. This means that the determination of a global choice for the ordered state is dynamically generated during phase transitions.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Multidisciplinary
Lotte Mertens, Jasper van Wezel
Summary: The argument of environment-assisted invariance (envariance) is commonly used in quantum measurement models to justify their ability to produce accurate statistics, particularly linear models. However, recent research has shown that linear collapse models cannot reproduce Born's rule. In this study, we address this contradiction and identify an inconsistency in the assumptions underlying envariance-based arguments. By explicitly considering the construction of a measurement machine, we demonstrate that envariance does not guarantee that every measurement will follow Born's rule. Instead, it implies that a measurement machine can be constructed for every quantum state, which yields Born's rule when measuring that specific state. This resolution aligns with the recent finding that objective collapse models must be nonlinear.
Editorial Material
Chemistry, Physical
Jasper van Wezel
Summary: The arrangement of magnetic ions in NbS2 layers has an effect on electrons as if there is a large magnetic field exerted in different directions for electrons moving at different velocities. This discovery goes beyond traditional magnets and allows for custom-made effective fields to guide materials into new territories.
Article
Materials Science, Multidisciplinary
Adam Klosinski, Wojciech Brzezicki, Alexander Lau, Clio E. Agrapidis, Andrzej M. Oles, Jasper van Wezel, Krzysztof Wohlfeld
Summary: We investigate the topological properties of helical atomic chains in elemental selenium and tellurium. We propose a realistic model with spin-orbit interaction, showing it to be topologically nontrivial. A crystalline symmetry protects a topological invariant, and we describe the orbitally polarized end-states with a strongly peaked orbital density modulation at the edge. We also propose a simplified model with three orbital chains and a crystalline symmetry-protected topological invariant, contrasting it with recent observations of the orbital Su-Schrieffer-Heeger model containing a p-orbital zigzag chain.
Article
Materials Science, Multidisciplinary
Joris Kattemoelle, Jasper Van Wezel
Summary: Establishing the nature of the ground state of the Heisenberg antiferromagnet on the kagome lattice is a difficult problem, but can be solved using a variational quantum eigensolver (VQE) on a quantum computer. VQE is also resilient to specific types of noise, but other noise types require error mitigation and performance optimization.
Article
Physics, Multidisciplinary
Lotte Mertens, Ali G. Moghaddam, Dmitry Chernyavsky, Corentin Morice, Jeroen van den Brink, Jasper van Wezel
Summary: Synthetic horizons offer an alternative approach to exploring fundamental questions in gravitational theory, and in this study, we investigate the emergence of thermal quantum states in the presence of a horizon. By studying the thermalization of the ground state due to the creation of a synthetic horizon, we demonstrate the formation of a thermal state. We also find that the resulting temperature is equal to the Unruh temperature when certain conditions are met.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Corentin Morice, Dmitry Chernyavsky, Jasper van Wezel, Jeroen van den Brink, Ali G. Moghaddam
Summary: In this study, we investigate the dynamics of wave packets and the localization of eigenstates in a recently proposed generalized lattice model. The low-energy behavior of these models imitates a quantum field theory in (1+1)D curved spacetime, aiming to create systems analogous to black holes. We observe a critical slowdown of zero-energy wave packets in a family of 1D tight-binding models with a power-law variation of the hopping parameter, indicating the presence of a horizon. Interestingly, wave packets with non-zero energies bounce back and reverse direction before reaching the horizon. We also find a power-law localization of all eigenstates, each adjacent to a region of exponential suppression, dictating the closest possible approach to the horizon for states with any given energy. These numerical findings are supported by a semiclassical description of wave packet trajectories, which align with the expected geodesics for the effective metric emerging from the lattice models in the continuum limit.
SCIPOST PHYSICS CORE
(2022)
Article
Physics, Multidisciplinary
Viktor Koenye, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jeroen van den Brink, Jasper van Wezel
Summary: In this study, we simulate the dynamics of massless Dirac fermions in curved space-times with one, two, and three spatial dimensions by constructing tight-binding Hamiltonians with spatially varying hoppings. These models represent tilted Weyl semimetals where the tilting varies with position, similar to the light cones near the horizon of a black hole. We demonstrate the gravitational analogies in these models by numerically evaluating the propagation of wave packets on the lattice and comparing them to the geodesics of the corresponding curved space-time. We also show that the motion of electrons in these spatially varying systems can be understood through the conservation of energy and the quasiconservation of quasimomentum. Furthermore, we reveal that horizons in the lattice models can be constructed with finite energies using specially designed tilting profiles.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Manoj Singh, Boning Yu, James Huber, Bishnu Sharma, Ghilles Ainouche, Ling Fu, Jasper van Wezel, Michael C. Boyer
Summary: In this study, scanning tunneling microscopy was used to investigate the domain structure of 1T-TaS2's nearly commensurate charge density wave (NC-CDW) state. The research revealed the evolution of the CDW lattice and the intradomain chirality characterizing the NC-CDW state. Unlike other related materials, the chiral nature of the NC-CDW state in 1T-TaS2 appears to be driven by a strong coupling with the lattice.
Article
Physics, Multidisciplinary
Yingying Peng, Xuefei Guo, Qian Xiao, Qizhi Li, Joerg Strempfer, Yongseong Choi, Dong Yan, Huixia Luo, Yuqing Huang, Shuang Jia, Oleg Janson, Peter Abbamonte, Jeroen van den Brink, Jasper van Wezel
Summary: Besides magnetic and charge order, regular arrangements of orbital occupation are also fundamental in condensed matter physics. This study confirms that the well-known charge density wave in 1T-TiSe2 corresponds to an orbital ordered phase, showing the close interplay between charge redistribution, lattice displacements, and orbital order. It demonstrates the significance of orbital degrees of freedom in TiSe2 and correlated van der Waals materials.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Corentin Morice, Ali G. Moghaddam, Dmitry Chernyavsky, Jasper van Wezel, Jeroen van den Brink
Summary: The study introduces a lattice model that can mimic phenomena similar to black hole event horizons and realize (1+1)D spacetime under certain conditions. When the position-dependent hopping integrals are influenced by specific factors, wave packets exhibit different behaviors on the lattice.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Adam Klosinski, Andrzej M. Oles, Clio Efthimia Agrapidis, Jasper van Wezel, Krzysztof Wohlfeld
Summary: Recent works highlight the crucial role of Coulomb interactions in the formation of helical chains and chiral electronic order in elemental chalcogens. The study found that the specific form of the emerging order is strongly dependent on the strength of the Hubbard interaction, with strong coupling leading to qualitatively different orbital density waves compared to weak coupling. Realistic values of interorbital Coulomb repulsion in elemental chalcogens place them in the weak-coupling phase, consistent with observations.
