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Reply to the Comment to the Paper “Symmetry Approach in the Problem of Gas Expansion into Vacuum” 对“气体膨胀成真空问题中的对称方法”一文的回复
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/S1063776123080071
E. A. Kuznetsov, M. Yu. Kagan
{"title":"Reply to the Comment to the Paper “Symmetry Approach in the Problem of Gas Expansion into Vacuum”","authors":"E. A. Kuznetsov,&nbsp;M. Yu. Kagan","doi":"10.1134/S1063776123080071","DOIUrl":"10.1134/S1063776123080071","url":null,"abstract":"<div><p>Reply to the comment of P.L. Chapovsky to the paper “Symmetry approach in the problem of gas expansion into vacuum,” JETP <b>132</b>, 704 (2021).</p></div>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"167 - 168"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084201","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
Expansion of Ultracold Bosons from a Magnetic Trap. Comment to the Paper of E.A. Kuznetsov and M.Yu. Kagan “Symmetry Approach in the Problem of Gas Expansion into Vacuum” 磁阱超冷玻色子的膨胀。E.A.库兹涅佐夫和M.Yu.Kagan的论文“气体膨胀到真空问题的对称性方法”评述
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/S1063776123080034
P. L. Chapovsky
{"title":"Expansion of Ultracold Bosons from a Magnetic Trap. Comment to the Paper of E.A. Kuznetsov and M.Yu. Kagan “Symmetry Approach in the Problem of Gas Expansion into Vacuum”","authors":"P. L. Chapovsky","doi":"10.1134/S1063776123080034","DOIUrl":"10.1134/S1063776123080034","url":null,"abstract":"<div><p>It is shown that the arguments of E.A. Kuznetsov and M.Yu. Kagan, JETP <b>132</b>, 704 (2021), give no reason to doubt the reliability of the conventional diagnostics of Bose-Einstein condensation of rarefied gases in traps by the expansion of condensates into vacuum.</p></div>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"163 - 166"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084014","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 171Yb+ Ion in Polychromatic Light Field 171Yb+离子在多色光场中的激光冷却
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/S1063776123080149
D. S. Krysenko, O. N. Prudnikov
{"title":"Laser Cooling of 171Yb+ Ion in Polychromatic Light Field","authors":"D. S. Krysenko,&nbsp;O. N. Prudnikov","doi":"10.1134/S1063776123080149","DOIUrl":"10.1134/S1063776123080149","url":null,"abstract":"<p>Standard methods of laser cooling <sup>171</sup>Yb<sup>+</sup> in a radiofrequency trap involve the use of coherent optical fields resonant to the optical transition of the <sup>2</sup><i>S</i><sub>1/2</sub> → <sup>2</sup><i>P</i><sub>1/2</sub> line, as well as a magnetic field that is used to destroy the coherent population trapping (CPT) appeared at the <sup>2</sup><i>S</i><sub>1/2</sub>(<i>F</i> = 1) level. Further precision measurements with use of the clock transitions (quadrupole <sup>2</sup><i>S</i><sub>1/2</sub>(<i>F</i> = 0) → <sup>2</sup><i>D</i><sub>3/2</sub>(<i>F</i> = 2) and octupole <sup>2</sup><i>S</i><sub>1/2</sub>(<i>F</i> = 0) → <sup>2</sup><i>F</i><sub>7/2</sub>(<i>F</i> = 2)) require significant suppression and control of residual magnetic fields. In this work, we investigate in detail an alternative method of laser cooling <sup>171</sup>Yb<sup>+</sup> with use of polychromatic fields, which allows completely eliminate the use of a magnetic field in the ion cooling process and thus suppress Zeeman quadratic shift associated with uncontrolled residual magnetic fields.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"239 - 245"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084108","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
Scalable Heteronuclear Architecture of Neutral Atoms Based on EIT 基于EIT的中性原子可扩展的异质核体系结构
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/S1063776123080046
Ahmed M. Farouk, I. I. Beterov, Peng Xu, I. I. Ryabtsev
{"title":"Scalable Heteronuclear Architecture of Neutral Atoms Based on EIT","authors":"Ahmed M. Farouk,&nbsp;I. I. Beterov,&nbsp;Peng Xu,&nbsp;I. I. Ryabtsev","doi":"10.1134/S1063776123080046","DOIUrl":"10.1134/S1063776123080046","url":null,"abstract":"<p>Based on our recent paper [arXiv:2206.12176 (2022)], we propose a scalable heteronuclear architecture of parallel implementation of CNOT gates in arrays of alkali-metal neutral atoms for quantum information processing. We considered a scheme where we perform CNOT gates in a parallel manner within the array, while they are performed sequentially between the pairs of neighboring qubits by coherently transporting an array of atoms of one atomic species (ancilla qubits) using an array of mobile optical dipole traps generated by a 2D acousto-optic deflector (AOD). The atoms of the second atomic species (data qubits) are kept in the array of static optical dipole traps generated by spatial light modulator (SLM). The moving ancillas remain in the superposition of their logical ground states without loss of coherence, while their transportation paths avoid overlaps with the spatial positions of data atoms. We numerically optimized the system parameters to achieve the fidelity for parallelly implemented CNOT gates around <span>(mathcal{F} = 95% )</span> for the experimentally feasible conditions. Our design can be useful implementation of surface codes for quantum error correction. Renyi entropy and mutual information are also investigated to characterize the gate performance.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"202 - 209"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084062","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
A Quantum Algorithm for Solving the Travelling Salesman Problem by Quantum Phase Estimation and Quantum Search 用量子相位估计和量子搜索求解旅行商问题的量子算法
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/S1063776123080095
Ch. Tszyunsi, I. I. Beterov
{"title":"A Quantum Algorithm for Solving the Travelling Salesman Problem by Quantum Phase Estimation and Quantum Search","authors":"Ch. Tszyunsi,&nbsp;I. I. Beterov","doi":"10.1134/S1063776123080095","DOIUrl":"10.1134/S1063776123080095","url":null,"abstract":"<p>A quantum algorithm for solving the traveling salesman problem by the quantum phase estimation and quantum search method is considered. An approach is developed that was previously proposed for solving this problem. A quantum register is used to encode the eigenstates of a unitary operator whose phase determines the length of each possible route. The quantum phase estimation algorithm is used to estimate the length of a route. Then, to find the minimum route length, the measured values of length are encoded into the states of the second quantum register, and the search for the optimal route is carried out using a modified Grover algorithm. Numerical simulation of the proposed quantum algorithm is carried out using the Qiskit library for one and two iterations of the modified Grover algorithm.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"210 - 215"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41083964","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
Precision Spectroscopy of Rydberg States in Alkaline Earth Atoms for Millimeter-Wave Radiation Measurement 用于毫米波辐射测量的碱土原子里德伯态的精确光谱
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/S1063776123080125
I. L. Glukhov, A. A. Kamenski, V. D. Ovsiannikov, V. G. Pal’chikov
{"title":"Precision Spectroscopy of Rydberg States in Alkaline Earth Atoms for Millimeter-Wave Radiation Measurement","authors":"I. L. Glukhov,&nbsp;A. A. Kamenski,&nbsp;V. D. Ovsiannikov,&nbsp;V. G. Pal’chikov","doi":"10.1134/S1063776123080125","DOIUrl":"10.1134/S1063776123080125","url":null,"abstract":"<p>Background of the electromagnetically induced transparency (EIT) resonance splitting by millimeter-wave radiation was investigated and so were calculated frequencies and amplitudes of radiation transitions between Rydberg states in alkaline earth atoms of IIA group elements, which are necessary for precise measurements of electric field magnitude at millimeter-wave (mmw) frequencies. Numerical values of the frequencies and matrix elements are approximated by asymptotic polynomials and tabulated for dipole transitions between singlet <i>n</i>S, <i>n</i>P, <i>n</i>D, and <i>n</i>F states with large values of principal quantum number <i>n</i>.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"169 - 177"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084004","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 Feedback-Loop Parameters in Thulium Optical Clocks at Synchronous Comparison 同步比较下铊光时钟反馈回路参数的优化
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/S1063776123080150
D. O. Tregubov, D. I. Provorchenko, D. A. Mishin, N. N. Kolachevskii, A. A. Golovizin
{"title":"Optimization of Feedback-Loop Parameters in Thulium Optical Clocks at Synchronous Comparison","authors":"D. O. Tregubov,&nbsp;D. I. Provorchenko,&nbsp;D. A. Mishin,&nbsp;N. N. Kolachevskii,&nbsp;A. A. Golovizin","doi":"10.1134/S1063776123080150","DOIUrl":"10.1134/S1063776123080150","url":null,"abstract":"<p>Synchronous comparison of optical clocks using phase-coherent clock lasers makes it possible to determine the difference (ratio) of clock transition frequencies, which is not limited by the total noise of lasers in use. A detailed simulation of the comparison of two thulium optical clocks is performed using synchronous interrogation of atoms by the radiation of a common clock laser. Some critical parameters have been determined, specifically: the residual noncorrelated frequency and amplitude noises of test pulses and reading noises, which may deteriorate the comparison stability. At the same time, it is demonstrated that this way is insensitive to fluctuations in the number of atoms, calibration of feedback-loop parameters, individual ejections in measurement cycles, and fluctuations of laboratory magnetic field.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"195 - 201"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084203","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
Observation of Kapitza–Dirac Diffraction in Atomic Lithium Gas Using Bragg’s Scattering 用Bragg散射观测原子锂气体中Kapitza–Dirac衍射
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/S1063776123080010
V. V. Baturo, V. A. Vinogradov, M. V. Platonova, I. V. Yukhnovets, A. V. Turlapov
{"title":"Observation of Kapitza–Dirac Diffraction in Atomic Lithium Gas Using Bragg’s Scattering","authors":"V. V. Baturo,&nbsp;V. A. Vinogradov,&nbsp;M. V. Platonova,&nbsp;I. V. Yukhnovets,&nbsp;A. V. Turlapov","doi":"10.1134/S1063776123080010","DOIUrl":"10.1134/S1063776123080010","url":null,"abstract":"<p>A short-lived density grating is produced in a gas of lithium atoms. The gas is preliminarily cooled in a magnetooptical trap. The grating is formed due to diffraction of atoms on a standing light wave. The grating is observed from Bragg’s scattering of light from it. This method of formation and observation over the grating can be used in a lithium-based atomic interferometer.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"153 - 156"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084012","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
Field Shift of Coherent Population Trapping Resonance Taking into Account Spatial Inhomogeneity of the Light Beam 考虑光束空间不均匀性的相干布居陷阱共振的场位移
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/S106377612308006X
D. V. Kovalenko, V. I. Yudin, M. Yu. Basalaev, N. V. Strokova, A. V. Taichenachev, O. N. Prudnikov
{"title":"Field Shift of Coherent Population Trapping Resonance Taking into Account Spatial Inhomogeneity of the Light Beam","authors":"D. V. Kovalenko,&nbsp;V. I. Yudin,&nbsp;M. Yu. Basalaev,&nbsp;N. V. Strokova,&nbsp;A. V. Taichenachev,&nbsp;O. N. Prudnikov","doi":"10.1134/S106377612308006X","DOIUrl":"10.1134/S106377612308006X","url":null,"abstract":"<p>We study the field shift of coherent population trapping (CPT) resonance excited by a bichromatic field in an open Λ system with account for the Gaussian profile of the laser radiation intensity. Two methods for error signal formation are considered: the harmonic frequency modulation and the step phase modulation (phase jumps). It is shown that the spatial inhomogeneity of the light beam leads to an essentially nonlinear dependence of the error signal shift on the laser radiation intensity. We propose an approach for the linearization of this dependence, which is important for the development of methods for suppressing the field shift in atomic clocks based on CPT resonances.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"223 - 228"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084060","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
Two-Dimensional Magneto-optical Trap for Producing a Flux of Cold Thulium Atoms 用于产生冷铊原子通量的二维磁光阱
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/S1063776123080162
M. O. Yaushev, D. A. Mishin, D. O. Tregubov, D. I. Provorchenko, N. N. Kolachevskii, A. A. Golovizin
{"title":"Two-Dimensional Magneto-optical Trap for Producing a Flux of Cold Thulium Atoms","authors":"M. O. Yaushev,&nbsp;D. A. Mishin,&nbsp;D. O. Tregubov,&nbsp;D. I. Provorchenko,&nbsp;N. N. Kolachevskii,&nbsp;A. A. Golovizin","doi":"10.1134/S1063776123080162","DOIUrl":"10.1134/S1063776123080162","url":null,"abstract":"<p>We propose a design of a source of cold thulium atoms based on a 2D magneto-optical trap and perform numerical simulation of its operation. Optimal parameters of cooling radiation and the magnetic field are determined; it is shown that for a total radiation power of 50 mW and an atomic oven temperature of 800 K, the proposed configuration can provide a flux of 4 × 10<sup>8</sup> cold atoms per second, and with an increase of the oven temperature, the flux can reach ~ 10<sup>11</sup> atom/s. Such a source can be used for building frequency standards as well as in experiments with quantum simulators and the Bose–Einstein condensate.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 2","pages":"178 - 186"},"PeriodicalIF":1.1,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084202","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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