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Early diagnosis of citrus Huanglongbing by Raman spectroscopy and machine learning 利用拉曼光谱和机器学习对柑橘黄龙病进行早期诊断
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-12-07 DOI: 10.1088/1612-202X/ad1097
L. Kong, Tianyuan Liu, Honglin Qiu, Xinna Yu, Xianda Wang, Zhiwei Huang, Mei-Ling Huang
{"title":"Early diagnosis of citrus Huanglongbing by Raman spectroscopy and machine learning","authors":"L. Kong, Tianyuan Liu, Honglin Qiu, Xinna Yu, Xianda Wang, Zhiwei Huang, Mei-Ling Huang","doi":"10.1088/1612-202X/ad1097","DOIUrl":"https://doi.org/10.1088/1612-202X/ad1097","url":null,"abstract":"Timely diagnosis of citrus Huanglongbing (HLB) is fundamental to suppressing disease spread and reducing economic losses. This paper explores the combination of Raman spectroscopy and machine learning for on-site, accurate and early diagnosis of citrus HLB. The tissue lesion characteristics of citrus leaves at different stages of HLB infection was explored by Raman spectroscopy, and a scientific spectral acquisition strategy was proposed. Combined with machine learning for feature extraction, modeling learning, and predictive analysis, the diagnostic accuracies of principal component analysis (PCA)-Partial least-square and PCA-support vector machine models for the prediction set were 94.07% and 95.56%, respectively. Compared with conventional random detection method, the detection strategy proposed in this paper shows higher accuracy, especially in early HLB diagnosis with significant advantages.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"24 8","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138590093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Quasi-classical motion of a particle in a bulk dissipative medium 质点在块状耗散介质中的准经典运动
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-12-01 DOI: 10.1088/1612-202X/ad0cb0
Astro Ltd, S. V. Sazonov
{"title":"Quasi-classical motion of a particle in a bulk dissipative medium","authors":"Astro Ltd, S. V. Sazonov","doi":"10.1088/1612-202X/ad0cb0","DOIUrl":"https://doi.org/10.1088/1612-202X/ad0cb0","url":null,"abstract":"A version of the quasi-classical approach is proposed, which makes it possible to describe the straight-line motion of a micro-particle in a bulk dissipative medium. From the side of the medium, the particle is acted upon by the force of viscous friction and the drag force, which are proportional to the velocity and the square of the velocity, respectively. In addition, an external conservative force is applied to the particle. The Green’s function of the particle and the quasi-classical coherent state in the form of a three-dimensional localized wave packet are found. It is shown that the translational motion of the wave packet is accompanied by a monotonic increase in the uncertainties of the particle coordinates up to certain maximum asymptotic values. Due to the drag force, these asymptotic uncertainties contain information about the corresponding initial uncertainties in the coordinates of the micro-particle, about its initial velocity, as well as about the external conservative force.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":" 42","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Correlated-photon-pair generation via SFWM in tapered optical fibers with femtosecond laser pump 利用飞秒激光泵浦在锥形光纤中通过 SFWM 产生相关光子对
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-29 DOI: 10.1088/1612-202x/ad0a6e
A L Shmakova, I Z Latypov, A A Kalachev
{"title":"Correlated-photon-pair generation via SFWM in tapered optical fibers with femtosecond laser pump","authors":"A L Shmakova, I Z Latypov, A A Kalachev","doi":"10.1088/1612-202x/ad0a6e","DOIUrl":"https://doi.org/10.1088/1612-202x/ad0a6e","url":null,"abstract":"Spontaneous four-wave mixing (SFWM) in optical micro-/nanofibers is studied theoretically and experimentally. Joint spectral intensity of the biphoton field generated via SFWM under excitation of femtosecond laser pulses is measured and calculated considering self-phase modulation of the pump pulses and SFWM throughout the tapered fibers. In comparison with the previous study (Shukhin <italic toggle=\"yes\">et al</italic> 2020 <italic toggle=\"yes\">Phys. Rev.</italic> A <bold>101</bold> 053822), replacing picosecond pump by a femtosecond one with the same average power makes it possible to increase the photon pair generation rate tenfold.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"99 3 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Application of TDLAS for measuring absorption coefficients of H2S rotational absorption lines near the wavelength of 2 µm 应用 TDLAS 测量波长为 2 µm 附近的 H2S 旋转吸收线的吸收系数
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-17 DOI: 10.1088/1612-202x/ad0a6f
S V Kireev, A A Kondrashov, B R Kusmankulov, S L Shnyrev, S V Suganeev, A I Sultangulova
{"title":"Application of TDLAS for measuring absorption coefficients of H2S rotational absorption lines near the wavelength of 2 µm","authors":"S V Kireev, A A Kondrashov, B R Kusmankulov, S L Shnyrev, S V Suganeev, A I Sultangulova","doi":"10.1088/1612-202x/ad0a6f","DOIUrl":"https://doi.org/10.1088/1612-202x/ad0a6f","url":null,"abstract":"This paper presents the experimental measurement of hydrogen sulfide absorption coefficients in the pressure range of 75–460 mbar of two rotational absorption lines of the vibrational band of H<sub>2</sub>S molecule at 021-000 transition using the tunable diode laser absorption spectroscopy technique. The obtained results are compared with the data of the HITRAN spectroscopic database.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise 热噪声下具有散射过程的石墨烯层系统中的量子干涉功率与量子相关性的关系
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-15 DOI: 10.1088/1612-202x/ad069f
Zakaria Bouafia, Mostafa Mansour
{"title":"Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise","authors":"Zakaria Bouafia, Mostafa Mansour","doi":"10.1088/1612-202x/ad069f","DOIUrl":"https://doi.org/10.1088/1612-202x/ad069f","url":null,"abstract":"Cutting-edge quantum processing technology is currently exploring the remarkable electronic properties of graphene layers, such as their high mobility and thermal conductivity. Our research is dedicated to investigating the behavior of quantum resources within a graphene layer system with a scattering process, specifically focusing on quantum interferometric power (QIP) and quantum correlations, while taking into account the influence of thermal noise. To quantify these correlations, we employ measures like local quantum uncertainty (LQU) and logarithmic negativity (LN). We examine how factors like temperature, inter-valley scattering processes strength, and other system parameters affect both QIP and quantum correlations. Our results reveal that higher temperatures lead to a reduction in QIP and non-classical correlations within graphene layers. Moreover, it is noteworthy that QIP and LQU respond similarly to changes in temperature, whereas LN is more sensitive to these variations. By optimizing system parameters such as band parameter, wavenumber operators and scattering processes strength, we can mitigate the impact of thermal noise and enhance the quantum advantages of graphene-based quantum processing","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"216 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Solar side-pumped Nd-doped fiber laser based on a doughnut-shaped hollow reflector 基于甜甜圈形空心反射器的太阳能侧泵浦掺钕光纤激光器
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-15 DOI: 10.1088/1612-202x/ad0a70
Jing Zhu, Yan Liu, Lanling Lan, Yulong Tang, Yuanyuan Zhang, Xiuhua Ma
{"title":"Solar side-pumped Nd-doped fiber laser based on a doughnut-shaped hollow reflector","authors":"Jing Zhu, Yan Liu, Lanling Lan, Yulong Tang, Yuanyuan Zhang, Xiuhua Ma","doi":"10.1088/1612-202x/ad0a70","DOIUrl":"https://doi.org/10.1088/1612-202x/ad0a70","url":null,"abstract":"A high-power solar side-pumped Nd-doped fiber laser based on a doughnut-shaped hollow reflector (DHR) is proposed. The primary concentrator consists of twelve off-axis parabolic mirrors. The DHR coupled with an array of three-dimensional compound parabolic concentrators (3D-CPCs) functions as the secondary concentrator, inside which many cycles of Nd-doped fiber is coiled. After being reflected by the off-axis parabolic mirrors, the sunlight is launched into the DHR through the twelve 3D-CPCs, and experiences multiple-times reflection by the DHR, and finally is absorbed by the Nd-doped fiber for laser oscillation. Ray tracing shows that 173-W of solar power can be absorbed by the fiber. By solving the rate equations and power transmission equations, laser output power, slope efficiency and optical-to-optical conversion efficiency of 10.3 W, 6.12% and 5.94%, respectively, are realized. This kind of solar-pumped fiber laser thus offers a new route for achieving high-power solar-pumped laser sources.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"6 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Symmetric bidirectional quantum teleportation via eight-qubit cluster state 基于8量子位簇态的对称双向量子隐形传态
4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-14 DOI: 10.1088/1612-202x/acfd8f
Rui Dai, Haisheng Li
{"title":"Symmetric bidirectional quantum teleportation via eight-qubit cluster state","authors":"Rui Dai, Haisheng Li","doi":"10.1088/1612-202x/acfd8f","DOIUrl":"https://doi.org/10.1088/1612-202x/acfd8f","url":null,"abstract":"Abstract This paper proposes a symmetric bidirectional quantum teleportation protocol through an eight-qubit cluster state as a quantum channel to achieve GHZ state interchange between two parties. Alice and Bob must first perform two CNOT gate operations on the unknown GHZ state to be sent in our scheme. Next, they need to complete the Bell state measurements and the corresponding unitary operations to obtain the corresponding GHZ state. Our protocol has lower operational complexity and higher inherent efficiency compared to other protocols. In addition, we have simulated the quantum circuit on the IBM qasm simulator to verify the feasibility of the protocol.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"26 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134991797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Separability and classification of multipartite quantum states 多部量子态的可分性与分类
4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-08 DOI: 10.1088/1612-202x/ad0537
Pan-Wen Ma, Hui Zhao, Naihuan Jing
{"title":"Separability and classification of multipartite quantum states","authors":"Pan-Wen Ma, Hui Zhao, Naihuan Jing","doi":"10.1088/1612-202x/ad0537","DOIUrl":"https://doi.org/10.1088/1612-202x/ad0537","url":null,"abstract":"Abstract We study separability in arbitrary multipartite quantum systems based on principal base matrices. Necessary conditions are presented for different kinds of separable states. These conditions can give a complete classification of multipartite quantum states. While the usual Bloch representation of a density matrix uses three types of generators, the representation with principal base matrices has one uniform type of generator which simplifies computation. In this paper, we take advantage of this simplicity to derive useful and operational criteria to detect multipartite separability. We first obtain criteria on detecting <?CDATA $1-3$?> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <mml:mn>1</mml:mn> <mml:mo>−</mml:mo> <mml:mn>3</mml:mn> </mml:math> separable, <?CDATA $2-2$?> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <mml:mn>2</mml:mn> <mml:mo>−</mml:mo> <mml:mn>2</mml:mn> </mml:math> separable, <?CDATA $1-1-2$?> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <mml:mn>1</mml:mn> <mml:mo>−</mml:mo> <mml:mn>1</mml:mn> <mml:mo>−</mml:mo> <mml:mn>2</mml:mn> </mml:math> separable and fully separable four-partite quantum states. We then study k -separability for multipartite quantum states in arbitrary dimensions. Detailed examples are given to show that our criteria are able to detect more entanglement states than some existing criteria.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"74 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135390697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Extra long phosphorescence in organic materials at cryogenic temperatures investigation 低温下有机材料超长磷光的研究
4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-07 DOI: 10.1088/1612-202x/ad053e
D Yu Tsipenyuk, V P Slobodyanin, A V Voropinov, F K Chikin
{"title":"Extra long phosphorescence in organic materials at cryogenic temperatures investigation","authors":"D Yu Tsipenyuk, V P Slobodyanin, A V Voropinov, F K Chikin","doi":"10.1088/1612-202x/ad053e","DOIUrl":"https://doi.org/10.1088/1612-202x/ad053e","url":null,"abstract":"Abstract In this paper, investigations of extra-long phosphorescence in organic materials and optical crystals at cryogenic temperatures are presented. This study continues the cycle of our previous works devoted to the physical mechanism understanding of the long-run phosphorescence excitation. We wish to create an advanced and efficient laser for the media based on the Shpolsky matrix analogue. Another goal is to consider the possibility of building an optical processor with an extra-long phosphorescence effect. For this purpose we were examining the experimental setup of complicated organic materials: cocamidopropyl betadine C 19 H 38 N 2 O 3 , polyethylene terephthalate (C 10 H 8 O 4 ) n , perfluoro (2-methyl-3-pentanone, Novec 649) CF 3 CF 2 C(O)CF(CF 3 ) 2 , Kalosha benzine (benzine BR-2, Nefras С2 80/120). Different optic and piezo crystals were also investigated: gadolinium aluminum gallium garnet Gd 3 Ga 3 Al 2 O 12 :Ce, lanthanum gallium silicate La 3 Ga 5 SiO 14 , terbium gallium garnet Tb 3 Ga 5 O 12 , La 3 Ga 5,5 Ta 0,5 O 14 .","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"111 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135476411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Quantum dots interacting with a non-classical field under Kerr-phase modulation as a resource for repeatable quantum algorithms 克尔相位调制下与非经典场相互作用的量子点作为可重复量子算法的资源
4区 物理与天体物理
Laser Physics Letters Pub Date : 2023-11-02 DOI: 10.1088/1612-202x/ad0538
S N Balybin, O V Tikhonova
{"title":"Quantum dots interacting with a non-classical field under Kerr-phase modulation as a resource for repeatable quantum algorithms","authors":"S N Balybin, O V Tikhonova","doi":"10.1088/1612-202x/ad0538","DOIUrl":"https://doi.org/10.1088/1612-202x/ad0538","url":null,"abstract":"Abstract An analytical solution describing the dynamics of a hybrid system comprising an interacting quantum dot and a quantum electromagnetic field in the presence of Kerr nonlinearity is obtained. A completely new regime of interaction is found. It provides stable periodically repeating dynamics for the total bipartite system and for the quantum dot excitation, accompanied by full and pure revivals. This is even observed when the initial field state is in a squeezed vacuum. Periodical strong entanglement and full disentanglement between the interacting subsystems are demonstrated. The obtained regime forms the basis for the development of quantum information algorithms and photon–matter interfaces involving these hybrid systems. The formation of non-Gaussian field states is revealed. Methods to control and manage the specific features of the found pure and mixed states of the considered subsystems are developed.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":"14 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135934095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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