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Coherent Population Trapping Resonance Parameters and Field Shifts during the Detection of Signals from Different Cross-Sectional Areas of the Interaction of Laser Radiation with Atoms 激光与原子相互作用不同截面信号探测过程中的相干布居陷阱共振参数和场位移
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080137
S. M. Ignatovich, M. N. Skvortsov, I. S. Mesenzova, N. L. Kvashnin, V. I. Vishnyakov, D. V. Brazhnikov, D. E. Tarasenko
{"title":"Coherent Population Trapping Resonance Parameters and Field Shifts during the Detection of Signals from Different Cross-Sectional Areas of the Interaction of Laser Radiation with Atoms","authors":"S. M. Ignatovich,&nbsp;M. N. Skvortsov,&nbsp;I. S. Mesenzova,&nbsp;N. L. Kvashnin,&nbsp;V. I. Vishnyakov,&nbsp;D. V. Brazhnikov,&nbsp;D. E. Tarasenko","doi":"10.1134/S1063776123080137","DOIUrl":"10.1134/S1063776123080137","url":null,"abstract":"<p>The results of an experimental comparison of the parameters of the coherent population trapping (CPT) resonance for the <sup>87</sup>Rb <i>D</i><sub>1</sub> line and the light shifts during the detection of signals from different cross-sectional areas of the interaction of laser radiation with atoms are presented. A method is proposed to search for zero-light-shift operating conditions and their automatic stabilization, which would improve the long-term stability of CPT-resonance-based microwave frequency standards.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"187 - 194"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084290","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
Active Pointing System for the Transmission of Ultrastable Optical Frequency Signals through an Open-Air Link 用于通过开放式链路传输超稳定光学频率信号的有源指向系统
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080083
A. D. Legoshin, K. A. Liskova, K. S. Kudeyarov, G. A. Vishnyakova, E. S. Mironchuk, N. O. Zhadnov, D. S. Kryuchkov, K. Yu. Khabarova, N. N. Kolachevsky
{"title":"Active Pointing System for the Transmission of Ultrastable Optical Frequency Signals through an Open-Air Link","authors":"A. D. Legoshin,&nbsp;K. A. Liskova,&nbsp;K. S. Kudeyarov,&nbsp;G. A. Vishnyakova,&nbsp;E. S. Mironchuk,&nbsp;N. O. Zhadnov,&nbsp;D. S. Kryuchkov,&nbsp;K. Yu. Khabarova,&nbsp;N. N. Kolachevsky","doi":"10.1134/S1063776123080083","DOIUrl":"10.1134/S1063776123080083","url":null,"abstract":"<p>An active pointing system has been developed and created for an atmospheric transfer link for ultrastable optical frequency signals. This system can significantly decrease the deviations of laser beam direction and ensure stable transmission under conditions of a moving reflector installed at the midpoint of the line. The results of testing the system confirm its high efficiency and potential for use under real conditions.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"216 - 222"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084291","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
Laser Cooling of Lithium-6 Atoms in a Bichromatic Light Field 激光冷却双色光场中的锂-6原子
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080058
R. Ya. Ilenkov, O. N. Prudnikov, A. A. Kirpichnikova, A. V. Taichenachev, V. I. Yudin
{"title":"Laser Cooling of Lithium-6 Atoms in a Bichromatic Light Field","authors":"R. Ya. Ilenkov,&nbsp;O. N. Prudnikov,&nbsp;A. A. Kirpichnikova,&nbsp;A. V. Taichenachev,&nbsp;V. I. Yudin","doi":"10.1134/S1063776123080058","DOIUrl":"10.1134/S1063776123080058","url":null,"abstract":"<p>The kinetics of <sup>6</sup>Li atoms in a bichromatic laser field exciting transitions on D2 and D1 lines is investigated. The model takes into account the complex real structure of energy levels of <sup>6</sup>Li (including the Zeeman degeneracy) as well as the nonuniform spatial polarization of the laser field. It is found that detuning and the polarization configuration of the light field component of the resonant D2 line of the <sup>6</sup>Li atom are of fundamental importance for laser cooling. The possibility of cooling of atoms below the Doppler limit is demonstrated.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"229 - 238"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084007","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
Double Radio-Optical Resonance in the Hanle Configuration under the Excitation of the D1 Absorption Line in Alkali Metal Atoms 碱金属原子中D1吸收线激发下Hanle构型的双射电光学共振
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080022
D. V. Brazhnikov, V. M. Entin, I. I. Ryabtsev
{"title":"Double Radio-Optical Resonance in the Hanle Configuration under the Excitation of the D1 Absorption Line in Alkali Metal Atoms","authors":"D. V. Brazhnikov,&nbsp;V. M. Entin,&nbsp;I. I. Ryabtsev","doi":"10.1134/S1063776123080022","DOIUrl":"10.1134/S1063776123080022","url":null,"abstract":"<p>The absorption of a light wave interacting with optical transitions in the D<sub>1</sub> line of an alkali metal atom subjected to microwave radiation that is in resonance with magnetic dipole transitions between hyperfine ground-state components, has been investigated. It is known that when scanning a longitudinal magnetic field (<b>B</b> || <b>k</b>, where <b>k</b> is the wavevector), one may observe a magneto-optical resonance due to the ground-state Hanle effect. In addition, the effect of double radio-optical resonance takes place because of the presence of the resonance microwave field. The joint influence of these effects on the formation of a narrow magneto-optical resonance in light wave absorption has been studied theoretically and experimentally. It has been shown analytically that the effects compete with each other and destructively act on the resonance formation. As a result, the amplitude of the resonance is small and its shape is complicated. However, in the presence of a buffer gas the pressure of which is such that the hyperfine splitting of the ground state remains spectrally unresolved, it becomes possible to observe a magneto-optical resonance with a relatively large amplitude. Experiments have been carried out with the use of a miniature glass cell (<i>V</i> ~ 0.1 cm<sup>3</sup>) filled with <sup>87</sup>Rb vapor and a buffer gas argon (a pressure of about 95 Torr). In particular, the theoretically predicted resonance narrowing with increasing light field intensity has been experimentally observed. A configuration for magneto-optical resonance excitation suggested here may be applied in quantum magnetometry to measure weak permanent magnetic fields and resonance microwave fields using cells filled with alkali metal vapor.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"254 - 270"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084006","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
Optimization of Entangling Logic Gates Based on the Rydberg Blockade Effect 基于Rydberg阻塞效应的纠缠逻辑门优化
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080113
L. V. Gerasimov, D. V. Kupriyanov, S. S. Straupe
{"title":"Optimization of Entangling Logic Gates Based on the Rydberg Blockade Effect","authors":"L. V. Gerasimov,&nbsp;D. V. Kupriyanov,&nbsp;S. S. Straupe","doi":"10.1134/S1063776123080113","DOIUrl":"10.1134/S1063776123080113","url":null,"abstract":"<p>The implementation of a quantum logic gate in a system of cold atoms in optical microtraps is analyzed. The dynamics of two spin qubits is simulated, and a number of processes that limit the efficiency of entanglement based on the Rydberg blockade effect are considered. A geometry of two-photon excitation of Rydberg states of atoms is proposed that makes it possible to increase the robustness of the system to variations in a number of parameters and to reduce losses associated with the incoherent scattering of the driving field.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"157 - 162"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084013","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
Three-Photon Laser Excitation of Single Rydberg Rubidium Atoms in an Optical Dipole Trap 光学偶极阱中单个里德伯铷原子的三光子激光激发
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-09-29 DOI: 10.1134/S1063776123080101
I. I. Beterov, E. A. Yakshina, D. B. Tret’yakov, N. V. Al’yanova, D. A. Skvortsova, G. Suliman, T. R. Zagirov, V. M. Entin, I. I. Ryabtsev
{"title":"Three-Photon Laser Excitation of Single Rydberg Rubidium Atoms in an Optical Dipole Trap","authors":"I. I. Beterov,&nbsp;E. A. Yakshina,&nbsp;D. B. Tret’yakov,&nbsp;N. V. Al’yanova,&nbsp;D. A. Skvortsova,&nbsp;G. Suliman,&nbsp;T. R. Zagirov,&nbsp;V. M. Entin,&nbsp;I. I. Ryabtsev","doi":"10.1134/S1063776123080101","DOIUrl":"10.1134/S1063776123080101","url":null,"abstract":"<p>Three-photon laser excitation of single rubidium atoms in an optical dipole trap (ODT) into the <sup>37</sup>P Rydberg state by laser radiation with wavelengths of 780, 1367, and 743 nm has been experimentally demonstrated. The excitation to Rydberg states is detected by an optical method using the losses of atoms in the ODT. The laser excitation spectra of single Rydberg atoms in the ODT are recorded, and the dependence of the excitation probability on the laser pulse duration is measured. The measured spectrum width was 2 MHz. Experiments on fluorescence quenching spectroscopy of a cloud of cold atoms in a magneto-optical trap during the three-photon laser excitation of atoms to Rydberg states are also carried out. The experimental results are compared with a numerical calculation. Methods for increasing the accuracy of the coherent three-photon laser excitation of Rydberg atoms in the ODT are considered.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"246 - 253"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084063","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: 1
Analysis of the Result of the Neutrino-4 Experiment Together with Other Experiments on the Search for Sterile Neutrinos within the 3 + 1 Neutrino Model 中微子-4实验与其它在3+1中微子模型中寻找无菌中微子实验结果的分析
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070130
A. P. Serebrov, R. M. Samoilov, M. E. Chaikovskii
{"title":"Analysis of the Result of the Neutrino-4 Experiment Together with Other Experiments on the Search for Sterile Neutrinos within the 3 + 1 Neutrino Model","authors":"A. P. Serebrov,&nbsp;R. M. Samoilov,&nbsp;M. E. Chaikovskii","doi":"10.1134/S1063776123070130","DOIUrl":"10.1134/S1063776123070130","url":null,"abstract":"<p>The correspondence of the results obtained in the Neutrino-4 experiment with the results of the NEOS, DANSS, STEREO, and PROSPECT experiments at reactors, the MiniBooNE, LSND, and MicroBoone experiments at accelerators, and the IceCube and BEST experiments with a <sup>51</sup>Cr neutrino source is analyzed. The agreement between the results of the Neutrino-4 experiment, the BEST experiment, and the gallium anomaly on the mixing angle is discussed. The discrepancy between the results of the listed direct experiments with the results of the reactor anomaly, as well as with constraints from solar and cosmological data, is discussed. It is shown that the results of these direct experiments on the search for sterile neutrinos and the IceCube experiment do not contradict the Neutrino-4 experiment within the 3 + 1 neutrino model within 3σ contours of experimental errors. The sterile neutrino parameters from the Neutrino-4 and BEST experiments make it possible to estimate the sterile neutrino mass as <i>m</i><sub>4</sub> = (2.70 ± 0.22) eV and the effective mass of the electron neutrino as <span>({{m}_{{4{{nu }_{e}}}}})</span> = (0.86 ± 0.21) eV. The matrix of the absolute values of the 3 + 1 neutrino model mixing parameters and the mixing scheme are presented.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 1","pages":"55 - 70"},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4847551","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
Melting Scenarios of Two-Dimensional Systems: Possibilities of Computer Simulation 二维系统的熔化情景:计算机模拟的可能性
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070129
V. N. Ryzhov, E. A. Gaiduk, E. E. Tareeva, Yu. D. Fomin, E. N. Tsiok
{"title":"Melting Scenarios of Two-Dimensional Systems: Possibilities of Computer Simulation","authors":"V. N. Ryzhov,&nbsp;E. A. Gaiduk,&nbsp;E. E. Tareeva,&nbsp;Yu. D. Fomin,&nbsp;E. N. Tsiok","doi":"10.1134/S1063776123070129","DOIUrl":"10.1134/S1063776123070129","url":null,"abstract":"<p>Modern theories of melting of two-dimensional systems are discussed that are mainly based on the concepts of the Berezinskii–Kosterlitz–Thouless (BKT) theory of phase transitions in two-dimensional systems with continuous symmetry. Today there exist three basic scenarios of melting of two-dimensional crystals. First of all, this is the Berezinskii–Kosterlitz–Thouless–Halperin–Nelson–Young (BKTHNY) theory, in which two-dimensional crystals are melted through two BKT-type continuous transitions with an intermediate hexatic phase. In this case a first-order phase transition can also occur. The third scenario has recently been proposed by Bernard and Krauth (BK), in which melting can occur through a BKT-type transition; in this case the hexatic phase–isotropic fluid transition is a first-order transition. The review presents a critical analysis of the approaches used to determine the parameters and the type of transition by computer simulation methods.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 1","pages":"125 - 150"},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4845944","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
High Harmonic Generation with Many-Particle Coulomb Interaction in Graphene Quantum Dot 石墨烯量子点中多粒子库仑相互作用的高谐波产生
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S1063776123070026
Kh. V. Sedrakian, A. G. Ghazaryan, B. R. Avchyan, G. A. Musayelyan, T. M. Markosyan
{"title":"High Harmonic Generation with Many-Particle Coulomb Interaction in Graphene Quantum Dot","authors":"Kh. V. Sedrakian,&nbsp;A. G. Ghazaryan,&nbsp;B. R. Avchyan,&nbsp;G. A. Musayelyan,&nbsp;T. M. Markosyan","doi":"10.1134/S1063776123070026","DOIUrl":"10.1134/S1063776123070026","url":null,"abstract":"<p>The multiphoton excitation and high harmonic generation (HHG) processes are considered using the microscopic quantum theory of nonlinear interaction of strong coherent electromagnetic (EM) radiation with rectangular graphene quantum dot (GQD) with zigzag edges and more than 80 atoms. The dynamic Hartree–Fock approximation has been used to consider the quantum dot-laser field nonlinear interaction at the nonadiabatic multiphoton excitation regime. The many-body Coulomb interaction is described in the extended Hubbard approximation. By numerical results, we show the significance of the rectangular GQD lateral size, shape, and EM wavefield orientation in rectangular GQD of the zigzag edge in the HHG process allowing for increasing the cutoff photon energy and the quantum yield of higher harmonics.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 1","pages":"47 - 54"},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4847548","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
Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells 水平圆柱形Hele-Shaw电池中超稀薄氢-空气火焰的分类和动力学
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-08-22 DOI: 10.1134/S106377612307004X
P. V. Moskalev, V. P. Denisenko, I. A. Kirillov
{"title":"Classification and Dynamics of Ultralean Hydrogen–Air Flames in Horizontal Cylindrical Hele–Shaw Cells","authors":"P. V. Moskalev,&nbsp;V. P. Denisenko,&nbsp;I. A. Kirillov","doi":"10.1134/S106377612307004X","DOIUrl":"10.1134/S106377612307004X","url":null,"abstract":"<p>Using the successively inverted projection method, we studied the dynamics of ultralean hydrogen–air flames propagating freely in a horizontal cylindrical Hele–Shaw cell. To quantify the two revealed characteristics of the flame dynamics—the dependence of the average flame velocities on time and the dependence of the initial flame velocity on the stoichiometry of the initial hydrogen–air mixture—we proposed time and stoichiometric scaling relations. The first relation approximates the dependence of the path of the flame front in hydrogen–air mixtures with an initial hydrogen concentration exceeding a certain critical value. The second relation approximates the dependencies of the initial flame front velocities on the hydrogen concentration. The general relationships for topologically different types of ultralean hydrogen–air flames can be interpreted as additional evidence of the presence of a general mechanism for the transition from discrete fronts of isolated drifting ball flames to a quasi-continuous deflagration flame front through a cascade of bifurcations.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 1","pages":"104 - 113"},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4851019","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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