Physical Review Applied最新文献_第3页

Trusted-source-noise model of discrete-modulated continuous-variable quantum key distribution 离散调制连续可变量子密钥分发的可信源噪声模型

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-11 DOI: 10.1103/physrevapplied.22.034024

Mingze Wu, Junhui Li, Bingjie Xu, Song Yu, Yichen Zhang

{"title":"Trusted-source-noise model of discrete-modulated continuous-variable quantum key distribution","authors":"Mingze Wu, Junhui Li, Bingjie Xu, Song Yu, Yichen Zhang","doi":"10.1103/physrevapplied.22.034024","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034024","url":null,"abstract":"Discrete-modulated continuous-variable quantum key distribution offers a pragmatic solution, greatly simplifying experimental procedures, while retaining robust integration with classical optical communication. Theoretical analyses have progressively validated the comprehensive security of this protocol, paving the way for practical experimentation. However, imperfect sources in practical implementations introduce noise. The traditional approach is to assume that eavesdroppers can control all of the source noise, which overestimates the ability of eavesdroppers and underestimates the secret-key rate. Some parts of source noise are intrinsic and cannot be manipulated by the eavesdropper, so they can be seen as trusted noise. We tailor a trusted-noise model specifically for the discrete-modulated protocol and upgrade the security analysis accordingly. Simulation results demonstrate that this approach successfully mitigates the negative impact of an imperfect source on system performance, while maintaining security of the protocol. Furthermore, our method can be used in conjunction with a trusted-detector-noise model, effectively reducing the influence of both source noise and detector noise in the experimental setup. This is a meaningful contribution to the practical deployment of discrete-modulated-continuous-variable-quantum-key-distribution systems.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"310 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224191","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

Determination of helical twist in liquid crystals: Examples and terpenoids as chiral dopants 确定液晶中的螺旋扭曲：实例和作为手性掺杂剂的萜类化合物

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-11 DOI: 10.1103/physrevapplied.22.034027

M.P. Rosseto, S. Hurley, E.K. Lenzi, D.-K. Yang, R.S. Zola

引用次数: 0

Topological logical elements based on defect-mediated sound-wave manipulation 基于缺陷介导声波操纵的拓扑逻辑元件

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-11 DOI: 10.1103/physrevapplied.22.034025

Shi-Feng Li, Jie-Yu Lu, Cui-Yu-Yang Zhou, Xin-Ye Zou, Jian-Chun Cheng

{"title":"Topological logical elements based on defect-mediated sound-wave manipulation","authors":"Shi-Feng Li, Jie-Yu Lu, Cui-Yu-Yang Zhou, Xin-Ye Zou, Jian-Chun Cheng","doi":"10.1103/physrevapplied.22.034025","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034025","url":null,"abstract":"Growing interest in acoustic topological insulators arises from their robust edge states, which are resistant to defects and backscattering. Traditionally, the edge states of topological insulators are believed to be nearly immune to subwavelength-sized defects. As a result, there have been few studies focusing on utilizing defects to enhance wave control. Here, we investigate the impact of introducing periodic defects into acoustic pseudospin systems on the band structures and extend our analysis to nonperiodic structures. We discover that even a single subwavelength defect can significantly affect the topological boundary states, providing a platform for controlling and switching pseudospin edge states using defects. Expanding on this discovery, we develop a broadband topological sound switch (TSS) that achieves a high transmission ratio before and after switching by simply rotating a single scatterer. Additionally, we design three topological logic gates based on this TSS and experimentally verify their functionality. Our theory and experiments demonstrate that the spatial arrangement of defects can serve as a means of manipulating sound waves, potentially advancing acoustic computing and information processing.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"36 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185207","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

Exceptional points in time-varying oscillators with enhanced sensing sensitivity 增强感应灵敏度的时变振荡器异常点

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-11 DOI: 10.1103/physrevapplied.22.034026

Yabin Jin, Wenjun Li, Bahram Djafari-Rouhani, Daniel Torrent, Yanxun Xiang, Fu-Zhen Xuan

{"title":"Exceptional points in time-varying oscillators with enhanced sensing sensitivity","authors":"Yabin Jin, Wenjun Li, Bahram Djafari-Rouhani, Daniel Torrent, Yanxun Xiang, Fu-Zhen Xuan","doi":"10.1103/physrevapplied.22.034026","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034026","url":null,"abstract":"We explore the exceptional points (EPs) in mass-spring oscillators with time-varying stiffness. The second-order EPs result from the coalescences of the fundamental and harmonic eigenmodes that can be achieved by a time modulation of the spring stiffness. The occurrence of EPs is first demonstrated in a theoretical model by solving the eigenvalue problem with the state-space method. The signature of the EP can be seen in the response spectrum when the system is subjected to an external excitation. The undamped and damped cases are both considered in this mass-spring oscillator, and the impact of the damping ratio and modulation amplitude on the EPs is systematically investigated. Based on an analogy of the equation of motion with the Mathieu differential equation, we discuss the stability of the undamped time-varying system under different modulation parameters and explore its connection to the EP phenomenon. As a typical property of a second-order EP, the square-root dependence of the frequency splitting response to a perturbation is studied by introducing an added mass. In a second part, the above theoretical concepts are established by simulation methods in an elastic solid mass-spring model and an equivalent time-varying stiffness is realized by shunting a piezoelectric patch with switch-controlled external negative capacitance circuits. This work should pave the way for applications of crack or perturbation detection in elastic media and inspire other elastic wave modulation functions in time-varying systems.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"8 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185206","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

Asymmetric transmission of electrons in ballistic graphene 弹道石墨烯中电子的非对称传输

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.l031003

Xin Tong, Ling Zhou, Ruihuang Zhao, Jiaxin Wang, Jinhu Luo, Junjie Du

引用次数: 0

First-principles quantum Monte Carlo study of charge-carrier mobility in organic molecular semiconductors 有机分子半导体中电荷载流子迁移率的第一原理量子蒙特卡洛研究

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.l031004

Johann Ostmeyer, Tahereh Nematiaram, Alessandro Troisi, Pavel Buividovich

引用次数: 0

Crosstalk suppression of parallel gates for fault-tolerant quantum computation with trapped ions via optical tweezers 通过光学镊子抑制并行门的串扰，从而利用受困离子实现容错量子计算

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.034021

Lin Cheng, Sheng-Chen Liu, Liang-You Peng, Qihuang Gong

{"title":"Crosstalk suppression of parallel gates for fault-tolerant quantum computation with trapped ions via optical tweezers","authors":"Lin Cheng, Sheng-Chen Liu, Liang-You Peng, Qihuang Gong","doi":"10.1103/physrevapplied.22.034021","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034021","url":null,"abstract":"The ability to perform entangling operations in parallel with a low error is essential for a large-scale fault-tolerant quantum computer. However, for trapped-ion systems, it is a challenging task due to the crosstalk resulting from the collective motional modes. Here, we develop a highly paralleled quantum circuit demonstrating a logical qubit based on the Steane code and study the impact of the crosstalk error on the performance of the fault-tolerant protocol. We show that the crosstalk indeed greatly destroys the fault-tolerant property of the quantum error correction. To achieve the break-even point with encoded qubits, we identify the suppression requirement of the crosstalk error to be less than <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mn>10</mn><mrow><mo>−</mo><mn>6</mn></mrow></msup></math> for the Steane code. Furthermore, to mitigate the crosstalk below the fault-tolerant threshold, we propose a highly efficient optimization scheme by utilizing the programmable optical tweezer array. Overall, we make an elegant combination of the pulse-control optimization of parallel gate operations with the fault-tolerant protocol on the error-protected universal quantum computer.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"62 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224224","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

High-energy electron radiography system with low chromatic aberrations based on active plasma lenses 基于主动等离子透镜的低色差高能电子射线照相系统

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.034022

Jie-Jie Lan, Quan-Tang Zhao, Zhang-Hu Hu, Zhao-Hui Ran, Wang-Wen Xu, Hao-Yuan Li, Jia Li, Shu-Chun Cao, Rui Cheng, Yong-Tao Zhao, Zi-Min Zhang, You-Nian Wang

{"title":"High-energy electron radiography system with low chromatic aberrations based on active plasma lenses","authors":"Jie-Jie Lan, Quan-Tang Zhao, Zhang-Hu Hu, Zhao-Hui Ran, Wang-Wen Xu, Hao-Yuan Li, Jia Li, Shu-Chun Cao, Rui Cheng, Yong-Tao Zhao, Zi-Min Zhang, You-Nian Wang","doi":"10.1103/physrevapplied.22.034022","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034022","url":null,"abstract":"A novel high-energy electron radiography system combined with an active plasma lens (APL) has been designed for the first time and validated by simulation studies. The system consists of a 50-MeV electron linear accelerator followed by a 3-cm-long capillary with a discharge current up to hundreds of amperes. With the APL, the distance from the object plane to the imaging plane can be reduced from 5 m to 45 cm with a magnification factor (MF) of 20, and pictures with 1.1-<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mtext fontfamily=\"times\">μ</mtext><mrow><mi mathvariant=\"normal\">m</mi></mrow></math> spatial resolution can be obtained. The effects of lens chromatic aberrations, imaging blurring, and the uniformity of the plasma discharge current are shown to be significant in obtaining a high-spatial-resolution radiograph, which have been discussed in this work. Such a plasma-based imaging lens has a high tolerance for chromatic aberrations, is suitable for imaging thick target materials, and has radial symmetric focusing and adjustable focusing gradients. Furthermore, a cascaded high-MF radiography system based on APLs has been proposed to improve spatial resolution.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"71 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185209","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

Decoupling elasticity and electrical conductivity of carbon-black gels filled with insulating non-Brownian grains 填充绝缘非布朗颗粒的碳黑凝胶的弹性和导电性解耦

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.034023

Thomas Larsen, Jesper de C. Christiansen, John R. Royer, Fraser H.J. Laidlaw, Wilson C.K. Poon, Tom Larsen, Søren J. Andreasen

引用次数: 0

Logical quantum circuits protected by the Steane code for specific noises in trapped ions 受困离子中特定噪声的 Steane 代码保护的逻辑量子电路

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-09-10 DOI: 10.1103/physrevapplied.22.034020

Sheng-Chen Liu, Lin Cheng, Liang-You Peng, Qihuang Gong

{"title":"Logical quantum circuits protected by the Steane code for specific noises in trapped ions","authors":"Sheng-Chen Liu, Lin Cheng, Liang-You Peng, Qihuang Gong","doi":"10.1103/physrevapplied.22.034020","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034020","url":null,"abstract":"In the presence of physical noise of all platforms for quantum computation, quantum error correction (QEC) becomes a critical way to realize quantum algorithms with large quantum volumes. In order to understand the influence of quantum noise on QEC codes and further improve the performance of logical circuits, the noises should be accurately analyzed with proper models. Here we focus on the trapped-ion system. Fundamentally, we start from the laser pulses of the quantum gates in the circuits and extract the noise components from the complete evolution of the quantum states, beyond the standard depolarizing model and other simplified models. Our simulations indicate that the logical performance under real noises is significantly better than that predicted by previous models. Meanwhile, the advantage of QEC is shown in the levels of one, two, and more logical qubits. Moreover, we can increase the logical fidelity by the method of ion mapping, which is based on knowledge of the specific noise distribution of different ions. Some powerful evidence from the numerical results demonstrates the possibility to access fault-tolerant quantum computation with the trapped-ion system.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224232","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