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Suppressing unknown disturbances to dynamical systems using machine learning 利用机器学习抑制对动力系统的未知干扰
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01885-2
Juan G. Restrepo, Clayton P. Byers, Per Sebastian Skardal
{"title":"Suppressing unknown disturbances to dynamical systems using machine learning","authors":"Juan G. Restrepo, Clayton P. Byers, Per Sebastian Skardal","doi":"10.1038/s42005-024-01885-2","DOIUrl":"10.1038/s42005-024-01885-2","url":null,"abstract":"Identifying and suppressing unknown disturbances to dynamical systems is a problem with applications in many different fields. Here we present a model-free method to identify and suppress an unknown disturbance to an unknown system based only on previous observations of the system under the influence of a known forcing function. We find that, under very mild restrictions on the training function, our method is able to robustly identify and suppress a large class of unknown disturbances. We illustrate our scheme with the identification of both deterministic and stochastic unknown disturbances to an analog electric chaotic circuit and with numerical examples where a chaotic disturbance to various chaotic dynamical systems is identified and suppressed. Identifying and mitigating unknown disturbances to complex systems poses a critical challenge in a wide range of disciplines. Here, the authors use machine learning to identify unknown disturbances made to unknown systems and a methodology to suppress these disturbances to recover the undisturbed system.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01885-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Room-temperature nonlinear transport and microwave rectification in antiferromagnetic MnBi2Te4 films 反铁磁MnBi2Te4薄膜的室温非线性输运和微波整流
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01897-y
Shanshan Liu, Rhonald Burgos, Enze Zhang, Naizhou Wang, Xiao-Bin Qiang, Chuanzhao Li, Qihan Zhang, Z. Z. Du, Rui Zheng, Jingsheng Chen, Qing-Hua Xu, Kai Leng, Weibo Gao, Faxian Xiu, Dimitrie Culcer, Kian Ping Loh
{"title":"Room-temperature nonlinear transport and microwave rectification in antiferromagnetic MnBi2Te4 films","authors":"Shanshan Liu, Rhonald Burgos, Enze Zhang, Naizhou Wang, Xiao-Bin Qiang, Chuanzhao Li, Qihan Zhang, Z. Z. Du, Rui Zheng, Jingsheng Chen, Qing-Hua Xu, Kai Leng, Weibo Gao, Faxian Xiu, Dimitrie Culcer, Kian Ping Loh","doi":"10.1038/s42005-024-01897-y","DOIUrl":"10.1038/s42005-024-01897-y","url":null,"abstract":"The discovery of the nonlinear Hall effect provides an avenue for studying the interplay among symmetry, topology, and phase transitions, with potential applications in signal doubling and high-frequency rectification. However, practical applications require devices fabricated on large area thin film as well as room-temperature operation. Here, we demonstrate robust room-temperature nonlinear transverse response and microwave rectification in MnBi2Te4 films grown by molecular beam epitaxy. We observe multiple sign-reversals in the nonlinear response by tuning the chemical potential. Through theoretical analysis, we identify skew scattering and side jump, arising from extrinsic spin-orbit scattering, as the main mechanisms underlying the observed nonlinear signals. Furthermore, we demonstrate radio frequency (RF) rectification in the range of 1–8 gigahertz at 300 K. These findings not only enhance our understanding of the relationship between nonlinear response and magnetism, but also expand the potential applications as energy harvesters and detectors in high-frequency scenarios. The nonlinear Hall effect enables studies of symmetry and topology with potential in high-frequency devices, but practical applications demand room temperature operation. The authors report robust room temperature nonlinear transverse responses and microwave rectification (1–8 GHz) in MnBi2Te4 thin films, driven by extrinsic spin-orbit scattering.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01897-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum valley Hall effect-based topological boundaries for frequency-dependent and -independent mode energy profiles 基于量子谷霍尔效应的频率依赖和非依赖模式能量谱拓扑边界
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01899-w
Keita Funayama, Kenichi Yatsugi, Hideo Iizuka
{"title":"Quantum valley Hall effect-based topological boundaries for frequency-dependent and -independent mode energy profiles","authors":"Keita Funayama, Kenichi Yatsugi, Hideo Iizuka","doi":"10.1038/s42005-024-01899-w","DOIUrl":"10.1038/s42005-024-01899-w","url":null,"abstract":"Topological artificial crystals can exhibit one-way wave-propagation along the boundary with the wave being localized perpendicular to the boundary. The control of localization of such topological wave propagation is of great importance for enhancing coupling or avoiding unwanted coupling among neighboring boundaries toward topological integrated circuits. However, the effect of the geometry of topological boundaries on localization properties is not yet fully clear. Here, we experimentally and numerically demonstrate valley-topological transport on representative valley-topological boundaries with micro-electro-mechanical systems. We show that the zigzag and bridge boundaries, which have highly efficient wave transport, exhibit frequency independent and dependent wave localization, respectively. A simple analytic model is presented to capture the different behaviors of the two boundaries observed in the experiments. Our results provide opportunities to engineer frequency responses in topological circuits including frequency selective couplers through proper selection of boundary geometries. The authors numerically and experimentally investigate the transport properties of a quantum valley-Hall effect in a micro electromechanical system. The zigzag and bridge boundaries, which have highly efficient wave transport, exhibit frequency independent and dependent wave localization, respectively.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-7"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01899-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direct visualization of local magnetic domain dynamics in a 2D Van der Walls material/ferromagnet interface 二维范德华材料/铁磁体界面局部磁域动力学的直接可视化
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01861-w
Joseph Vimal Vas, Rohit Medwal, Sourabh Manna, Mayank Mishra, Aaron Muller, John Rex Mohan, Yasuhiro Fukuma, Martial Duchamp, Rajdeep Singh Rawat
{"title":"Direct visualization of local magnetic domain dynamics in a 2D Van der Walls material/ferromagnet interface","authors":"Joseph Vimal Vas, Rohit Medwal, Sourabh Manna, Mayank Mishra, Aaron Muller, John Rex Mohan, Yasuhiro Fukuma, Martial Duchamp, Rajdeep Singh Rawat","doi":"10.1038/s42005-024-01861-w","DOIUrl":"10.1038/s42005-024-01861-w","url":null,"abstract":"Controlling the magnetic domain propagation is the key to realize ultrafast, high-density domain wall-based memory and logic devices for next generation computing. Two-Dimensional (2D) Van der Waals materials introduce localized modifications to the interfacial magnetic order, which could enable efficient control over the propagation of magnetic domains. However, there is limited direct experimental evidence and understanding of the underlying mechanism, for 2D material mediated control of domain wall propagation. Here, using Lorentz-Transmission Electron Microscopy (L-TEM) along with the Modified Transport of Intensity equations (MTIE), we demonstrate controlled domain expansion with in-situ magnetic field in a ferromagnet (Permalloy, NiFe) interfacing with a 2D VdW material Graphene (Gr). The Gr/NiFe interface exhibits distinctive domain expansion rate with magnetic field selectively near the interface which is further analysed using micromagnetic simulations. Our findings are crucial for comprehending direct visualization of interface controlled magnetic domain expansion, offering insights for developing future domain wall-based technology. This study explores how the interface between Permalloy and graphene affects the propagation of magnetic domains. Using advanced transmission electron microscopy and simulations, the research reveals key insights that could advance future memory and logic technologies.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-6"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01861-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reconstructing real-space geometries of polyatomic molecules undergoing strong field laser-induced Coulomb explosion 强场激光诱导库仑爆炸后多原子分子实空间几何形状的重建
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01863-8
Aydin Ashrafi-Belgabad, Reza Karimi, Mohammad Monfared, Kaili Tian, Parviz Parvin, Benji Wales, Éric Bisson, Samuel Beaulieu, Mathieu Giguère, Jean-Claude Kieffer, Philippe Lassonde, François Légaré, Heide Ibrahim, Joseph H. Sanderson
{"title":"Reconstructing real-space geometries of polyatomic molecules undergoing strong field laser-induced Coulomb explosion","authors":"Aydin Ashrafi-Belgabad, Reza Karimi, Mohammad Monfared, Kaili Tian, Parviz Parvin, Benji Wales, Éric Bisson, Samuel Beaulieu, Mathieu Giguère, Jean-Claude Kieffer, Philippe Lassonde, François Légaré, Heide Ibrahim, Joseph H. Sanderson","doi":"10.1038/s42005-024-01863-8","DOIUrl":"10.1038/s42005-024-01863-8","url":null,"abstract":"Coulomb explosion is an established momentum imaging technique, where the molecules are ionized multiple times on a femtosecond time scale before breaking up into ionized fragments. By measuring the momentum of all the ions, information about the initial molecular structure is theoretically available. However, significant geometric changes due to multiple ionizations occur before the explosion, posing a challenge in retrieving the ground-state structure of molecules from the measured momentum values of the fragments. In this work, we investigate theoretically and experimentally such a connection between the ground-state geometry of a polyatomic molecule (OCS) and the detected momenta of ionic fragments from the Coulomb explosion. By relying on time-dependent density functional theory (TDDFT), we can rigorously model the ionization dynamics of the molecule in the tunneling regime. We reproduce the energy release and the Newton plot momentum patterns of an experiment in which OCS is ionized to the 6+ charge state. Our results provide insight into the behavior of molecules during strong field multiple ionization, opening a way toward precision imaging of real-space molecular geometries using tabletop lasers. Understanding molecular structure and dynamics through strong-field laser interactions holds great promise. The authors use quantum calculations to show how bonds and angles evolve in an OCS molecule ionized six times by a 7 fs, 800 nm laser pulse, accurately predicting our experimental results.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01863-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a Helmholtz free energy equation of state for fluid and solid phases via artificial neural networks 用人工神经网络建立流固两相的亥姆霍兹自由能状态方程
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01892-3
Gustavo Chaparro, Erich A. Müller
{"title":"Development of a Helmholtz free energy equation of state for fluid and solid phases via artificial neural networks","authors":"Gustavo Chaparro, Erich A. Müller","doi":"10.1038/s42005-024-01892-3","DOIUrl":"10.1038/s42005-024-01892-3","url":null,"abstract":"A longstanding challenge in thermodynamics has been the development of a unified analytical expression for the free energy of matter capable of describing all thermodynamic properties. Although significant strides have been made in modeling fluid phases using continuous equations of state (EoSs), the crystalline state has remained largely unexplored because of its complexity. This work introduces an approach that employs artificial neural networks to construct an EoS directly from comprehensive molecular simulation data. The efficacy of this method is demonstrated through application to the Mie potential, resulting in a thermodynamically consistent model seamlessly bridging fluid and crystalline phases. The proposed EoS accurately predicts metastable regions, enabling a comprehensive characterization of the phase diagram, which includes the critical and triple points. The article presents an equation of state (EoS) for fluid and solid phases using artificial neural networks. This EoS accurately models thermophysical properties and predicts phase transitions, including the critical and triple points. This approach offers a unified way to understand different states of matter.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01892-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations 太赫兹辐射双焦双色场的时空操纵
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01893-2
Jingjing Zhao, Yizhu Zhang, Yanjun Gao, Meng Li, Xiaokun Liu, Weimin Liu, Tian-Min Yan, Yuhai Jiang
{"title":"Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations","authors":"Jingjing Zhao, Yizhu Zhang, Yanjun Gao, Meng Li, Xiaokun Liu, Weimin Liu, Tian-Min Yan, Yuhai Jiang","doi":"10.1038/s42005-024-01893-2","DOIUrl":"10.1038/s42005-024-01893-2","url":null,"abstract":"Mixing the fundamental (ω) and the second harmonic (2ω) waves in the gas phase is a widely employed technique for emitting terahertz (THz) pulses. The THz generation driven by bi-chromatic fields can be described by the photocurrent model, where the THz generation is attributed to free electrons ionized by the ω field, and the 2ω field provides a perturbation to break the symmetry of the asymptotic momentum of free electrons. However, we find that the THz radiation is amplified by one order of magnitude when driven by bi-focal bi-chromatic fields, which cannot be explained only using the photocurrent model. Meanwhile, present measurements demonstrate that the THz radiation mainly originates from the plasma created by the 2ω pulses instead of the ω pulses. Energy transfer from the 2ω beam to the THz beam during the THz generation has been observed, validating the major contribution of the 2ω beam. Furthermore, the THz bandwidth has been observed to extensively exceed the bandwidth of the pump pulse, not be explained by the photocurrent model as well. These counterintuitive results present a significant challenge for understanding strong-field nonlinear optics and simultaneously expanding various applications. Mixing the fundamental (ω) and the second harmonic (2ω) waves in the gas phase is a widely used technique for generating terahertz pulses. The authors experimentally present an enhanced terahertz emission through the temporal-spatial manipulation of bi-focal bi-chromatic fields, and the THz radiation mainly originates from the plasma created by the 2ω pulses instead of the ω pulses, which cannot be explained only using photocurrent model.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-6"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01893-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Liquid-liquid phase separation driven by charge heterogeneity 电荷非均质性驱动的液液相分离
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01875-4
Daniele Notarmuzi, Emanuela Bianchi
{"title":"Liquid-liquid phase separation driven by charge heterogeneity","authors":"Daniele Notarmuzi, Emanuela Bianchi","doi":"10.1038/s42005-024-01875-4","DOIUrl":"10.1038/s42005-024-01875-4","url":null,"abstract":"Despite the intrinsic charge heterogeneity of proteins plays a crucial role in the liquid-liquid phase separation (LLPS) of a broad variety of protein systems, our understanding of the effects of their electrostatic anisotropy is still in its early stages. We approach this issue by means of a coarse-grained model based on a robust mean-field description that extends the DLVO theory to non-uniformly charged particles. We numerically investigate the effect of surface charge patchiness and net particle charge on varying these features independently and with the use of a few parameters only. The effect of charge anisotropy on the LLPS critical point is rationalized via a thermodynamic-independent parameter based on orientationally averaged pair properties, that estimates the particle connectivity and controls the propensity of the liquid phase to condensate. We show that, even though directional attraction alone is able to lower the particle bonding valence—thus shifting the critical point towards lower temperatures and densities—directional repulsion significantly and systematically diminishes the particle functionality, thus further reducing the critical parameters. This electrostatically-driven shift can be understood in terms of the additional morphological constraints introduced by the directional repulsion, that hinder the condensation of dense aggregates. Experiments show that charge heterogeneity in proteins affects their liquid-liquid phase separation (LLPS). Using a theoretically grounded and numerically efficient coarse-grained model, the authors study how the amount of charge and its surface distribution affects the LLPS. They find that electrostatics controls the connectivity of particles thus impacting the emergence of the LLPS.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01875-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-field quantum conferencing overcomes the network capacity limit 多场量子会议克服了网络容量的限制
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-19 DOI: 10.1038/s42005-024-01894-1
Yuan-Mei Xie, Yu-Shuo Lu, Yao Fu, Hua-Lei Yin, Zeng-Bing Chen
{"title":"Multi-field quantum conferencing overcomes the network capacity limit","authors":"Yuan-Mei Xie, Yu-Shuo Lu, Yao Fu, Hua-Lei Yin, Zeng-Bing Chen","doi":"10.1038/s42005-024-01894-1","DOIUrl":"10.1038/s42005-024-01894-1","url":null,"abstract":"Quantum conferencing enables multiple nodes within a quantum network to share a secure conference key for private message broadcasting. The key rate, however, is limited by the repeaterless capacity to distribute multipartite entangled states across the network. Currently, in the finite-size regime, no feasible schemes utilizing existing experimental techniques can overcome the fundamental rate-distance limit of quantum conferencing in quantum networks without repeaters. Here, we propose a practical, multi-field scheme that breaks this limit, involving virtually establishing Greenberger-Horne-Zeilinger states through post-measurement coincidence matching. This proposal features a measurement-device-independent characteristic and can directly scale to support any number of users. Simulations show that the fundamental limitation on the conference key rate can be overcome in a reasonable running time of sending 1014 pulses. We predict that it offers an efficient design for long-distance broadcast communication in future quantum networks. Quantum networks require secure conference keys for users to communicate and decrypt broadcasts. The authors propose a quantum conferencing protocol that overcomes key rate limits in networks without repeaters by using post-measurement coincidence matching, enabling secure, efficient, and flexible communication resistant to detector side channel attacks.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-8"},"PeriodicalIF":5.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01894-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A topological route to engineering robust and bright supersymmetric laser arrays 设计坚固明亮的超对称激光阵列的拓扑途径
IF 5.4 1区 物理与天体物理
Communications Physics Pub Date : 2024-12-18 DOI: 10.1038/s42005-024-01905-1
Soujanya Datta, Mohammadmahdi Alizadeh, Ramy El-Ganainy, Krishanu Roychowdhury
{"title":"A topological route to engineering robust and bright supersymmetric laser arrays","authors":"Soujanya Datta, Mohammadmahdi Alizadeh, Ramy El-Ganainy, Krishanu Roychowdhury","doi":"10.1038/s42005-024-01905-1","DOIUrl":"10.1038/s42005-024-01905-1","url":null,"abstract":"In recent years, several proposals that leverage principles from condensed matter and high-energy physics for engineering laser arrays have been put forward. The most important among these concepts are topology, which enables the construction of robust zero-mode laser devices, and supersymmetry (SUSY), which holds the potential for achieving phase locking in laser arrays. In this work, we show that the relation between supersymmetric coupled bosonic and fermionic oscillators on one side, and bipartite networks (and hence chiral symmetry) on another side can be exploited together with non-Hermitian engineering for building one- and two-dimensional laser arrays with in-phase synchronization. To demonstrate our strategy, we present a concrete design starting from the celebrated Su-Schrieffer-Heeger (SSH) model to arrive at a SUSY laser structure that enjoys two key advantages over those reported in previous works. Firstly, the design presented here features a near-uniform geometry for both the laser array and supersymmetric reservoir (i.e., the widths and distances between the cavity arrays are almost the same). Secondly, the uniform field distribution in the presented structure leads to a far-field intensity that scales as N2 where N is the number of lasing elements. Taken together, these two features can enable the implementation of higher-power laser arrays that are easy to fabricate, and hence provide a roadmap for pushing the frontier of SUSY laser arrays beyond the proof-of-concept phase. In-phase synchronization of laser arrays remains one of the most important open problems in laser science. This work utilizes the relationship between chiral symmetric tight-binding models and supersymmetry to engineer a near-uniform laser array with a superior far-field intensity scaling, extending the frontiers of laser technology.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":" ","pages":"1-9"},"PeriodicalIF":5.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01905-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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