New Journal of Physics最新文献_第10页

Shell-model study of 58Ni using quantum computing algorithm 利用量子计算算法对 58Ni 进行壳模型研究

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-09 DOI: 10.1088/1367-2630/ad5756

Bharti Bhoy, Paul Stevenson

引用次数: 0

Connecting quantum cities: simulation of a satellite-based quantum network 连接量子城市：模拟基于卫星的量子网络

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-09 DOI: 10.1088/1367-2630/ad5b13

Raja Yehia, Matteo Schiavon, Valentina Marulanda Acosta, Tim Coopmans, Iordanis Kerenidis, David Elkouss, Eleni Diamanti

引用次数: 0

Unconventional edge states in a two-leg ladder 双腿阶梯中的非常规边缘状态

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1367-2630/ad5bf9

C A Downing, L Martín-Moreno, O I R Fox

{"title":"Unconventional edge states in a two-leg ladder","authors":"C A Downing, L Martín-Moreno, O I R Fox","doi":"10.1088/1367-2630/ad5bf9","DOIUrl":"https://doi.org/10.1088/1367-2630/ad5bf9","url":null,"abstract":"Some popular mechanisms for restricting the diffusion of waves include introducing disorder (to provoke Anderson localization) and engineering topologically non-trivial phases (to allow for topological edge states to form). However, other methods for inducing somewhat localized states in elementary lattice models have been historically much less studied. Here we show how edge states can emerge within a simple two-leg ladder of coupled harmonic oscillators, where it is important to include interactions beyond those at the nearest neighbor range. Remarkably, depending upon the interplay between the coupling strength along the rungs of the ladder and the next-nearest neighbor coupling strength along one side of the ladder, edge states can indeed appear at particular energies. In a wonderful manifestation of a type of bulk-edge correspondence, these edge state energies correspond to the quantum number for which additional stationary points appear in the continuum bandstructure of the equivalent problem studied with periodic boundary conditions. Our theoretical results are relevant to a swathe of classical or quantum lattice model simulators, such that the proposed edge states may be useful for applications including waveguiding in metamaterials and quantum transport.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"46 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of blue-shift length in macroscopic properties of high-harmonic generation 蓝移长度在高次谐波生成宏观特性中的作用

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1367-2630/ad5bfa

Margarita Khokhlova, Vasily Strelkov

{"title":"Role of blue-shift length in macroscopic properties of high-harmonic generation","authors":"Margarita Khokhlova, Vasily Strelkov","doi":"10.1088/1367-2630/ad5bfa","DOIUrl":"https://doi.org/10.1088/1367-2630/ad5bfa","url":null,"abstract":"The production of brighter coherent XUV radiation by intense laser pulses through the process of high-harmonic generation (HHG) is one of the central challenges in contemporary nonlinear optics. We study the generation and spatial propagation of high harmonics analytically and via <italic toggle=\"yes\">ab initio</italic> simulations. We focus on the length scales defining the growth of the harmonic signal with propagation distance and show that the well-known coherence length limits HHG only for relatively low driving intensities. For higher intensities, the photoionisation of the medium, naturally accompanying HHG, leads to essentially transient phase matching and laser frequency blue shift. By systematically taking both of these factors into account, we demonstrate that the behaviour of the harmonic signal at higher intensities is defined by another length scale—the blue-shift length. In this generation regime the XUV intensity at a given frequency first grows quadratically and then saturates passing the blue-shift length, but the total harmonic efficiency continues growing linearly due to the linear increase of the harmonic line bandwidth. The changeover to this generation regime takes place for all harmonic orders roughly simultaneously. The rate of the efficiency growth is maximal if the atomic dispersion is compensated by photoelectrons near the centre of the laser pulse. Our theory offers a robust way to choose the generation conditions that optimise the growth of the harmonic signal with propagation.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"25 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Competing interactions in strongly driven multi-level systems 强驱动多级系统中相互竞争的相互作用

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-04 DOI: 10.1088/1367-2630/ad5a32

Jana Bender, Patrick Mischke, Tanita Klas, Florian Binoth, Hani Naim, Herwig Ott and Thomas Niederprüm

引用次数: 0

Topological boundary modes in nonlinear dynamics with chiral symmetry 具有手性对称性的非线性动力学中的拓扑边界模式

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-03 DOI: 10.1088/1367-2630/ad5b14

Di Zhou

引用次数: 0

Critical non-Hermitian topology induced quantum sensing 临界非赫密拓扑诱导量子传感

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-03 DOI: 10.1088/1367-2630/ad5c95

S Sarkar, F Ciccarello, A Carollo and A Bayat

引用次数: 0

Higher-order topological Dirac phase in Y3InC: a first-principles study Y3InC 中的高阶拓扑狄拉克相：第一原理研究

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-02 DOI: 10.1088/1367-2630/ad59ff

P C Sreeparvathy, Rovi Angelo B Villaos, Zhi-Quan Huang and Feng-Chuan Chuang

{"title":"Higher-order topological Dirac phase in Y3InC: a first-principles study","authors":"P C Sreeparvathy, Rovi Angelo B Villaos, Zhi-Quan Huang and Feng-Chuan Chuang","doi":"10.1088/1367-2630/ad59ff","DOIUrl":"https://doi.org/10.1088/1367-2630/ad59ff","url":null,"abstract":"Higher-order topological insulators hosting intriguing topologically protected hinge or corner states are of significant research interest. However, materials that possess higher-order topological hinge states associated with gapless bulk Dirac phases still need to be explored. Using first-principles calculations with hybrid exchange functional, we explore the electronic structure and topological properties of Y3InC and a few of its sister compounds, totaling 16 bulk materials. A symmetry-protected triple point phase, with dominated d-t2g character, is observed in Y3InC without spin–orbit coupling (SOC). Interestingly, the SOC induces a twin Dirac node phase in the bulk Y3InC. Furthermore, the computed Z4 topological invariant reveals the higher-order topological nature of investigated materials. To demonstrate the gapless hinge states, we conduct edge state calculations using a rod-shaped geometry of Y3InC. Remarkably, Y3InC is identified to host multi-Dirac nodes in the bulk and surface phases together with the higher-order hinge states. These results lay the groundwork for further experimental and theoretical investigations into cubic antiperovskite materials for higher-order topological phases.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"47 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids 相思胶体混合物中的非互惠集体动力学

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-02 DOI: 10.1088/1367-2630/ad50ff

Gennaro Tucci, Ramin Golestanian and Suropriya Saha

{"title":"Nonreciprocal collective dynamics in a mixture of phoretic Janus colloids","authors":"Gennaro Tucci, Ramin Golestanian and Suropriya Saha","doi":"10.1088/1367-2630/ad50ff","DOIUrl":"https://doi.org/10.1088/1367-2630/ad50ff","url":null,"abstract":"A multicomponent mixture of Janus colloids with distinct catalytic coats and phoretic mobilities is a promising theoretical system to explore the collective behavior arising from nonreciprocal interactions. An active colloid produces (or consumes) chemicals, self-propels, drifts along chemical gradients, and rotates its intrinsic polarity to align with a gradient. As a result the connection from microscopics to continuum theories through coarse-graining couples densities and polarization fields in unique ways. Focusing on a binary mixture, we show that these couplings render the unpatterned reference state unstable to small perturbations through a variety of instabilities including oscillatory ones which arise on crossing an exceptional point or through a Hopf bifurcation. For fast relaxation of the polar fields, they can be eliminated in favor of the density fields to obtain a microscopic realization of the Nonreciprocal Cahn–Hilliard model for two conserved species with two distinct sources of non-reciprocity, one in the interaction coefficient and the other in the interfacial tension. Our work establishes Janus colloids as a versatile model for a bottom-up approach to both scalar and polar active mixtures.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"151 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing information-driven awareness allocation for controlling activity-triggered epidemic spread 优化信息驱动的认知分配，控制由活动引发的流行病传播

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-02 DOI: 10.1088/1367-2630/ad5b7f

Jie Chen, Maobin Hu and Jinde Cao

{"title":"Optimizing information-driven awareness allocation for controlling activity-triggered epidemic spread","authors":"Jie Chen, Maobin Hu and Jinde Cao","doi":"10.1088/1367-2630/ad5b7f","DOIUrl":"https://doi.org/10.1088/1367-2630/ad5b7f","url":null,"abstract":"In the contemporary era, the advent of epidemics instigates a substantial upswing in relevant information dissemination, bolstering individuals’ resistance to infection by concurrently reducing activity contacts and reinforcing personal protective measures. To elucidate this intricate dynamics, we introduce a composite four-layer network model designed to capture the interplay among information-driven awareness, human activity, and epidemic spread, with a focus on the allocation of individuals’ limited attention in diminishing activity frequency and self-infection rates. One intriguing observation from our findings is an anomalous, concave non-monotonic relationship between awareness trade-off and epidemic spread, with a more pronounced prevalence at an intermediate least awareness efficacy. This underscores the inadvisability of relaxing self-protection through reduced activity frequency or compensating for increased activity frequency by enhancing self-protection. Especially noteworthy is the significance of enhancing self-protection in response to heightened information dissemination and inherent activity demands to curtail infection risk. However, in scenarios with increasing ancillary activity frequency, the emphasis should exclusively shift towards reducing activity exposure. The model establishes a theoretical threshold for accurately predicting awareness efficacy in epidemic outbreaks. Optimal awareness allocation consistently resides at the extremes—either completely avoiding unnecessary activity contact or adopting full self-protection. This guidance, contingent on information level and activity demand, offers valuable insights into the delicate balance between individual behaviors and epidemic prevention.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"230 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0