Physical Review Applied最新文献_第8页

Cubic magneto-optic Kerr effect in Ni(111) thin films with and without twinning 有孪晶和无孪晶 Ni(111) 薄膜中的立方磁光克尔效应

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-26 DOI: 10.1103/physrevapplied.22.024066

Maik Gaerner, Robin Silber, Tobias Peters, Jaroslav Hamrle, Timo Kuschel

{"title":"Cubic magneto-optic Kerr effect in Ni(111) thin films with and without twinning","authors":"Maik Gaerner, Robin Silber, Tobias Peters, Jaroslav Hamrle, Timo Kuschel","doi":"10.1103/physrevapplied.22.024066","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024066","url":null,"abstract":"In most studies utilizing the magneto-optic Kerr effect (MOKE), the detected change of polarized light upon reflection from a magnetized sample is supposed to be proportional to the magnetization <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">M</mi></mrow></math>. However, MOKE signatures quadratic in <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">M</mi></mrow></math> have also been identified and utilized, e.g., to sense the structural order in Heusler compounds, to detect spin-orbit torque or to image antiferromagnetic domains. In our study, we observe a strong anisotropic MOKE contribution of third order in <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">M</mi></mrow></math> in <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Ni</mi></math>(111) thin films, attributed to a cubic magneto-optic tensor <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mo>∝</mo><mspace width=\"0.2em\"></mspace><msup><mrow><mi mathvariant=\"bold\">M</mi></mrow><mn>3</mn></msup></math>. We further show that the angular dependence of cubic MOKE (CMOKE) is affected by the amount of structural domain twinning in the sample. Our detailed study on CMOKE will open up opportunities for CMOKE applications with sensitivity to twinning properties of thin films, e.g., CMOKE spectroscopy and microscopy or time-resolved CMOKE. Furthermore, the in-plane magnetization orientation can be detected with CMOKE when perpendicular incidence light is used, which is suitable for MOKE setups that do not provide oblique incidence.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"52 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185318","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

Critical nonlinear aspects of hopping transport for reconfigurable logic in disordered dopant networks 无序掺杂网络中可重构逻辑的跳变传输的关键非线性问题

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-26 DOI: 10.1103/physrevapplied.22.024063

Henri Tertilt, Jonas Mensing, Marlon Becker, Wilfred G. van der Wiel, Peter A. Bobbert, Andreas Heuer

{"title":"Critical nonlinear aspects of hopping transport for reconfigurable logic in disordered dopant networks","authors":"Henri Tertilt, Jonas Mensing, Marlon Becker, Wilfred G. van der Wiel, Peter A. Bobbert, Andreas Heuer","doi":"10.1103/physrevapplied.22.024063","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024063","url":null,"abstract":"Nonlinear behavior in the hopping transport of interacting charges enables reconfigurable logic in disordered dopant network devices, where voltages applied at control electrodes tune the relation between voltages applied at input electrodes and the current measured at an output electrode. From kinetic Monte Carlo simulations we analyze the critical nonlinear aspects of variable-range hopping transport for realizing Boolean logic gates in these devices on three levels. First, we quantify the occurrence of individual gates for random choices of control voltages. We find that linearly inseparable gates such as the xor gate are less likely to occur than linearly separable gates such as the and gate, despite the fact that the number of different regions in the multidimensional control voltage space for which and or xor gates occur is comparable. Second, we use principal-component analysis to characterize the distribution of the output current vectors for the (00,10,01,11) logic input combinations in terms of eigenvectors and eigenvalues of the output covariance matrix. This allows a simple and direct comparison of the behavior of different simulated devices and a comparison to experimental devices. Third, we quantify the nonlinearity in the distribution of the output current vectors necessary for realizing Boolean functionality by introducing three nonlinearity indicators. The analysis provides a physical interpretation of the effects of changing the hopping distance and temperature and is used in a comparison with data generated by a deep neural network trained on a physical device.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224169","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

Mitigating errors in dc magnetometry via zero-noise extrapolation 通过零噪声外推法减少直流磁力测量中的误差

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-23 DOI: 10.1103/physrevapplied.22.024062

John S. Van Dyke, Zackary White, Gregory Quiroz

引用次数: 0

Nonadiabatic geometric quantum gates that are robust against systematic errors 可抵御系统误差的非绝热几何量子门

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-23 DOI: 10.1103/physrevapplied.22.024061

Yan Liang, Yi-Xuan Wu, Zheng-Yuan Xue

{"title":"Nonadiabatic geometric quantum gates that are robust against systematic errors","authors":"Yan Liang, Yi-Xuan Wu, Zheng-Yuan Xue","doi":"10.1103/physrevapplied.22.024061","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024061","url":null,"abstract":"A nonadiabatic geometric quantum gate is realized by integrating nonadiabatic geometric phases with global geometric features into the unitary quantum control, thereby removing the limitation of a long evolution time in the adiabatic case. However, systematic errors are inevitable in practical quantum control; these lead to the deviation of the evolution from target conditions to inducing geometric phases, smearing the robustness of the induced geometric quantum gates. Here, we present a general theoretical framework with enhanced robustness for geometric quantum gates by preserving fundamental geometric conditions. We first analytically evaluate the influence of systematic errors on geometric gates and then propose an optimized approach to mitigate this influence. Numerical simulations indicate that, as the geometric conditions are still maintained in the presence of systematic errors in our scheme, the constructed geometric quantum gates exhibit strong robustness, far superior to that of conventional schemes. Furthermore, we propose implementing the scheme in superconducting quantum circuits, where geometric quantum gates can achieve high fidelity with current experimental parameters. Therefore, the enhanced gate performance highlights the promise of our scheme for large-scale quantum computations.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"6 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185321","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

Realization of dynamically controlled resonator pairs in nanomechanical arrays 在纳米机械阵列中实现动态控制谐振器对

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-22 DOI: 10.1103/physrevapplied.22.024060

Yichuan Zhang, Tian Tian, Shaochun Lin, Jingwei Zhou, Longhao Wu, Zhouning Liu, Chang-Kui Duan, Liang Zhang, Jiangfeng Du

引用次数: 0

Source monitoring for plug-and-play continuous-variable quantum key distribution 即插即用连续可变量子密钥分发的源监控

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-12 DOI: 10.1103/physrevapplied.22.024033

Yun Shao, Yan Pan, Heng Wang, Ao Sun, Zhiwang Gan, Yaodi Pi, Ting Ye, Jinlu Liu, Yang Li, Yichen Zhang, Wei Huang, Bingjie Xu

{"title":"Source monitoring for plug-and-play continuous-variable quantum key distribution","authors":"Yun Shao, Yan Pan, Heng Wang, Ao Sun, Zhiwang Gan, Yaodi Pi, Ting Ye, Jinlu Liu, Yang Li, Yichen Zhang, Wei Huang, Bingjie Xu","doi":"10.1103/physrevapplied.22.024033","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024033","url":null,"abstract":"Continuous-variable quantum key distribution (CV-QKD) with plug-and-play design offers a promising route in simplifying the system implementation and shows intriguing prospects for quantum access network applications. However, such a scheme makes it possible for the eavesdropper (Eve) to completely control the source, helping her to gain more information since the laser travels through the unsecured channel before being modulated, which will severely compromise the performance of the system and limit its potential application. To fight against the security loophole, we propose a passive source monitoring scheme based on a combination of beam splitter and homodyne detector, as well as source noise suppression. The corresponding entanglement-based model is established to estimate the secret key rate for the proposed scheme. We show that the performance of the plug-and-play CV-QKD system can be significantly improved by using the source monitoring scheme compared with the untrusted source model. With typical parameters, the maximum transmission distance can be promoted by more than 50%, and the secret key rate can be increased by more than 25% when the transmission distance is longer than 50 km. This study provides a feasible approach for improving the security and performance of the plug-and-play CV-QKD and holds positive potential for practical applications.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949305","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

Restrictions of microwave electrometry due to nonlocal interactions in Rydberg atoms 雷德贝格原子中的非局部相互作用对微波电学的限制

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-12 DOI: 10.1103/physrevapplied.22.024034

Bin-Bin Wang, Xiao-Jun Zhang, Jin-Hui Wu

{"title":"Restrictions of microwave electrometry due to nonlocal interactions in Rydberg atoms","authors":"Bin-Bin Wang, Xiao-Jun Zhang, Jin-Hui Wu","doi":"10.1103/physrevapplied.22.024034","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024034","url":null,"abstract":"Large dipole moments between high Rydberg states have been utilized to measure microwave electric fields based on electromagnetically induced transparency, while nonlocal Rydberg interactions are not suitably addressed yet in most relevant works. Here we adopt a mean-field superatom model to investigate the main restrictions of Rydberg microwave electrometry due to nonlocal interactions in atomic samples of appropriate densities. It is found that accurate microwave measurements can be attained in the linear regime only for dilute enough atomic samples and not too strong probe fields, which jointly determine whether Rydberg excitations are insignificant. This then leads to the critical lines of atomic density and probe intensity, below which the discrepancy between measured and real values is negligible due to vanishing Rydberg interactions, for a fixed microwave or coupling field. Our findings are instructive to identify the optimal conditions for Rydberg microwave electrometry by reaching a compromise between high precisions and high accuracies, requiring, respectively, large and small numbers of Rydberg excitations, when measuring weaker microwave fields.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"2 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949303","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

Conditions for enhanced shot noise in field-effect transistors 场效应晶体管射出噪声增强的条件

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-12 DOI: 10.1103/physrevapplied.22.024037

Fabrizio Mazziotti, Demetrio Logoteta, Giuseppe Iannaccone

{"title":"Conditions for enhanced shot noise in field-effect transistors","authors":"Fabrizio Mazziotti, Demetrio Logoteta, Giuseppe Iannaccone","doi":"10.1103/physrevapplied.22.024037","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024037","url":null,"abstract":"We demonstrate that it is possible to observe enhanced shot noise in field-effect transistors, i.e., a current noise spectral density <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>S</mi><mo>></mo><msub><mi>S</mi><mi>Poisson</mi></msub></math>, where <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>S</mi><mi>Poisson</mi></msub><mo>=</mo><mn>2</mn><mi>q</mi><mi>I</mi></math> is the so-called “shot noise” spectral density associated to a Poissonian process of electrons traversing the channel. Whereas the effects responsible for shot-noise suppression have been broadly investigated, here we unveil the mechanism and the conditions leading to an enhancement of shot noise in field-effect transistors biased in the subthreshold or weak inversion regime, that have particular relevance in the case of short-channel metal-oxide-semiconductor field-effect transistors. The effect is due to the interplay between carrier backscattering in the channel and Coulomb repulsion among carriers. We evaluate quantitatively the effect with a semianalytical model for different types of transistors, and find a characteristic shape of the Fano factor <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>F</mi><mo>=</mo><mi>S</mi><mo>/</mo><msub><mi>S</mi><mi>Poisson</mi></msub></math> as a function of gate bias, that enables us to look for the signature of this effect in experiments.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"15 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949502","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

Oxygen vacancies in niobium pentoxide as a source of two-level system losses in superconducting niobium 五氧化二铌中的氧空位是超导铌中两级系统损耗的来源

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-12 DOI: 10.1103/physrevapplied.22.024035

D. Bafia, A. Murthy, A. Grassellino, A. Romanenko

{"title":"Oxygen vacancies in niobium pentoxide as a source of two-level system losses in superconducting niobium","authors":"D. Bafia, A. Murthy, A. Grassellino, A. Romanenko","doi":"10.1103/physrevapplied.22.024035","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024035","url":null,"abstract":"We identify a major source of quantum decoherence in three-dimensional superconducting radio-frequency (SRF) resonators and two-dimensional transmon qubits composed of oxidized niobium: oxygen vacancies in the niobium pentoxide, which drive two-level system (TLS) losses. By probing the effect of sequential in situ vacuum-baking treatments on the rf performance of bulk <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Nb</mi></math> SRF resonators and on the oxide structure of a representative <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Nb</mi></math> sample using TOF SIMS, we find a nonmonotonic evolution of cavity quality factor <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>Q</mi><mn>0</mn></msub></math>, which correlates with the interplay of <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>Nb</mi><mn>2</mn></msub><msub><mrow><mi mathvariant=\"normal\">O</mi></mrow><mn>5</mn></msub></math> vacancy generation and oxide-thickness reduction. We localize this effect to the oxide itself and present the insignificant role of diffused interstitial oxygen in the underlying <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Nb</mi></math> by regrowing the oxide via wet oxidation, which reveals a mitigation of aggravated TLS losses. We hypothesize that such vacancies in the pentoxide serve as magnetic impurities and are a source of TLS-driven rf loss.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"74 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949503","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

Universal reconstruction method for x-ray scattering tensor tomography based on wavefront modulation 基于波前调制的 X 射线散射张量断层成像通用重建方法

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-12 DOI: 10.1103/physrevapplied.22.024031

Ginevra Lautizi, Alain Studer, Marie-Christine Zdora, Fabio De Marco, Jisoo Kim, Vittorio Di Trapani, Federica Marone, Pierre Thibault, Marco Stampanoni

引用次数: 0