Physical Review Applied最新文献_第7页

Sequential-measurement thermometry with quantum many-body probes 利用量子多体探针进行顺序测量测温

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-27 DOI: 10.1103/physrevapplied.22.024069

Yaoling Yang, Victor Montenegro, Abolfazl Bayat

{"title":"Sequential-measurement thermometry with quantum many-body probes","authors":"Yaoling Yang, Victor Montenegro, Abolfazl Bayat","doi":"10.1103/physrevapplied.22.024069","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024069","url":null,"abstract":"Measuring the temperature of a quantum system is an essential task in almost all aspects of quantum technologies. Theoretically, an optimal strategy for thermometry often requires measuring energy, which demands full accessibility over the entire system as well as a complex entangled measurement basis. In this paper, we take a different approach and show that single-qubit sequential measurements in the computational basis not only allow for precise thermometry of a many-body system, but may also achieve precision beyond the thermometry capacity of the probe at equilibrium, given by the Cramér-Rao bound. Thus, using consecutive single-qubit measurements of the probe out of equilibrium is, in most cases, very beneficial, as it achieves lower-temperature uncertainties and avoids demanding energy measurements when compared with probes at thermal equilibrium. To obtain such precision, the time between the two subsequent measurements should be smaller than the thermalization time so that the probe never thermalizes. Therefore, the nonequilibrium dynamics of the system continuously imprint information about temperature in the state of the probe. To demonstrate the generality of our findings, we consider thermometry in both spin chains and the Jaynes-Cummings model.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"20 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224166","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

Imaging symmetric and antisymmetric behavior of orbital-angular-momentum-entangled two-photon states 轨道-角动量-纠缠双光子态的对称和非对称成像行为

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-27 DOI: 10.1103/physrevapplied.22.024068

Zeferino Ibarra-Borja, Pablo Yepiz-Graciano, Nicolas Claro-Rodríguez, Alfred B. U’Ren, Roberto Ramírez-Alarcón

{"title":"Imaging symmetric and antisymmetric behavior of orbital-angular-momentum-entangled two-photon states","authors":"Zeferino Ibarra-Borja, Pablo Yepiz-Graciano, Nicolas Claro-Rodríguez, Alfred B. U’Ren, Roberto Ramírez-Alarcón","doi":"10.1103/physrevapplied.22.024068","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024068","url":null,"abstract":"We report on an experiment in which orbital-angular-momentum (OAM)-entangled photon pairs generated by the spontaneous parametric down-conversion process can be engineered to have particular symmetry properties. Our method is based on the use of a Dove-prism pair in conjunction with Hong-Ou-Mandel (HOM) interferometry resolved in transverse position and OAM. The latter allows us to engineer the postselected two-photon state to exhibit a specific type of symmetry. By selecting particular topological charge values for the pump and for the postselected two-photon state, we can transition from a symmetric two-photon state and a HOM dip to an antisymmetric state and a HOM peak. Spatial resolution allows us to obtain the HOM interferogram both at the single-pixel level and globally by summing over all sensor pixels. Furthermore, through spatially selective OAM projection of the detected photon pairs, we can define multiple transverse regions with different symmetry properties, as verified by our spatially resolved HOM apparatus. Although we used two transverse regions for this proof-of-concept demonstration, this method could in principle be scaled to a larger number of regions, leading to a new technique to be added to the existing toolbox for quantum technologies in the photonic domain.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"38 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185317","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 oxygen in laser-induced contamination at diamond-vacuum interfaces 氧气在金刚石-真空界面激光诱导污染中的作用

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-26 DOI: 10.1103/physrevapplied.22.024067

Shreyas Parthasarathy, Maxime Joos, Lillian B. Hughes, Simon A. Meynell, Taylor A. Morrison, J.D. Risner-Jamtgaard, David M. Weld, Kunal Mukherjee, Ania C. Bleszynski Jayich

{"title":"Role of oxygen in laser-induced contamination at diamond-vacuum interfaces","authors":"Shreyas Parthasarathy, Maxime Joos, Lillian B. Hughes, Simon A. Meynell, Taylor A. Morrison, J.D. Risner-Jamtgaard, David M. Weld, Kunal Mukherjee, Ania C. Bleszynski Jayich","doi":"10.1103/physrevapplied.22.024067","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024067","url":null,"abstract":"Many modern-day quantum science experiments rely on high-fidelity measurement of fluorescent signals emitted by the quantum system under study. A pernicious issue encountered when such experiments are conducted near a material interface in vacuum is “laser-induced contamination” (LIC): the gradual accretion of fluorescent contaminants on the surface where a laser is focused. Fluorescence from these contaminants can entirely drown out any signal from, e.g., optically probed color centers in the solid state. Crucially, while LIC appears often in this context, it has not been systematically studied. In this work, we probe the onset and growth rate of LIC for a diamond nitrogen-vacancy center experiment in vacuum, and we correlate the contamination-induced fluorescence intensities to micron-scale physical buildup of contaminant on the diamond surface. Drawing upon similar phenomena previously studied in the space optics community, we use photocatalyzed oxidation of contaminants as a mitigation strategy. We vary the residual oxygen pressure over 9 orders of magnitude and find that LIC growth is inhibited at near-atmospheric oxygen partial pressures, but the growth rate at lower oxygen pressure is nonmonotonic. Finally, we discuss a model for the observed dependence of LIC growth rate on oxygen content and propose methods to extend in situ mitigation of LIC to a wider range of operating pressures.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"60 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224167","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

First-principles characterization of thermal conductivity in LaPO4-based alloys 基于 LaPO4 的合金导热性第一原理表征

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-26 DOI: 10.1103/physrevapplied.22.024064

Anees Pazhedath, Lorenzo Bastonero, Nicola Marzari, Michele Simoncelli

{"title":"First-principles characterization of thermal conductivity in LaPO4-based alloys","authors":"Anees Pazhedath, Lorenzo Bastonero, Nicola Marzari, Michele Simoncelli","doi":"10.1103/physrevapplied.22.024064","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024064","url":null,"abstract":"Alloys based on lanthanum phosphate (<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mrow><mi>La</mi><mi>PO</mi></mrow><mn>4</mn></msub></math>) are often employed as thermal barrier coatings, due to their low thermal conductivity and structural stability over a wide temperature range. To enhance the thermal-insulation performance of these alloys, it is essential to comprehensively understand the fundamental physics governing their heat conduction. Here, we employ the Wigner formulation of thermal transport in conjunction with first-principles calculations to elucidate how the interplay between anharmonicity and compositional disorder determines the thermal properties of <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>La</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>Gd</mi><mi>x</mi></msub><msub><mi>PO</mi><mn>4</mn></msub></math> alloys, and discuss the fundamental physics underlying the emergence and coexistence of particlelike and wavelike heat-transport mechanisms. We also show how the Wigner transport equation correctly describes the thermodynamic limit of a compositionally disordered crystal, while the Boltzmann transport equation does not. Our predictions for microscopic vibrational properties (temperature-dependent Raman spectrum) and for macroscopic thermal conductivity are validated against experiments. Finally, we leverage these findings to devise strategies to optimize the performance of thermal barrier coatings.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"24 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185319","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

Electron-phonon scattering in two-dimensional Dirac-source transistors 二维狄拉克源晶体管中的电子-声子散射

IF 4.6 2区物理与天体物理

Physical Review Applied Pub Date : 2024-08-26 DOI: 10.1103/physrevapplied.22.024065

Shuaishuai Yuan, Hong Guo

{"title":"Electron-phonon scattering in two-dimensional Dirac-source transistors","authors":"Shuaishuai Yuan, Hong Guo","doi":"10.1103/physrevapplied.22.024065","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.024065","url":null,"abstract":"Electron-phonon (<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>e</mi></math>-ph) scattering is a key effect in quantum transport and electronic device physics which is, however, often neglected in atomistic device simulation due to its impractical computational burden. Here we investigate e-ph effects in two-dimensional (2D) FETs, where the injecting source is graphene that inject “Dirac” electrons into the FET channel. Such a Dirac-source FET was experimentally known to have excellent transfer characteristics for its lower off-state current due to the electronic structure of the graphene. By using an approximate but computationally efficient technique (the Zacharias-Giustino method) to capture e-ph scattering, we quantitatively analyze to what extent e-ph scattering affects the operation of Dirac source, as a function of temperature. Our nonequilibrium Green’s function density-functional-theory analysis microscopically reveal the e-ph scattering and we make a comprehensive evaluation of it across real, momentum, and energy spaces, covering both the tunneling and thermionic emission regions. The findings suggest that e-ph scattering does not significantly impact the overall performance of the Dirac-source FETs. For the graphene-<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>WSe</mi><mn>2</mn></msub></math> device, the e-ph effects amount to somewhat increase the off-state current, which is not significant as to alter the subthreshold property of the transistor. Other factors, such as gate efficiency—determined by the body factor—exhibit a more pronounced influence on device performance for this system.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"1 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224168","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

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