JETP Letters最新文献

Modeling the Composition and Structure of Earth’s Inner Core Using Deep Machine Learning 利用深度机器学习模拟地球内核的组成和结构

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026607815

V. E. Valiulin, A. V. Mikheyenkov, N. M. Chtchelkatchev, K. D. Litasov, V. V. Brazhkin

引用次数: 0

Refractive Index Modification of PMMA and PDMS by Ultrashort Laser Pulses with Variable Duration 变时超短激光脉冲对PMMA和PDMS折射率的影响

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026607864

Yu. S. Gulina, J. Zhu, A. V. Gorevoy, N. I. Dolzhenko, E. N. Rimskaya, S. I. Kudryashov

引用次数: 0

Application of a Numerical Image Reconstruction Method to Improve Spatial Resolution in Diagnostics of X-Ray Plasma Sources Using Large-Aperture Pinhole Cameras 数值图像重建方法在大孔径针孔相机x射线等离子体源诊断中的应用

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026607797

E. A. Bolkhovitinov, A. A. Rupasov, A. A. Kologrivov, O. P. Ivanov, V. N. Potapov

引用次数: 0

Near-Critical Behavior of Heat Capacity during Transitions to the Antiferromagnetic State in Hexaborides RB6 (R = Nd, Gd, and Tb) 六硼化物RB6 （R = Nd, Gd，和Tb）向反铁磁态转变过程中热容的近临界行为

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026608572

N. E. Sluchanko, A. N. Azarevich, A. V. Bogach, A. V. Shestakov, S. Yu. Gavrilkin, A. Yu. Tsvetkov, V. V. Voronov, S. Gabani, K. Flachbart, V. N. Ryzhov, V. V. Brazhkin

{"title":"Near-Critical Behavior of Heat Capacity during Transitions to the Antiferromagnetic State in Hexaborides RB6 (R = Nd, Gd, and Tb)","authors":"N. E. Sluchanko, A. N. Azarevich, A. V. Bogach, A. V. Shestakov, S. Yu. Gavrilkin, A. Yu. Tsvetkov, V. V. Voronov, S. Gabani, K. Flachbart, V. N. Ryzhov, V. V. Brazhkin","doi":"10.1134/S0021364026608572","DOIUrl":"10.1134/S0021364026608572","url":null,"abstract":"Precision measurements of heat capacity ({{C}_{p}}) were performed in a magnetic field of up to 90 kOe in the vicinity of the Neel temperature ({{T}_{N}}) in hexaborides NdB6, GdB6, and TbB6 with Jahn–Teller (JT) structural instability, critical behavior ({{C}_{p}}(T)) was studied. It has been established that the phase transformation in these RB6 belongs to the class of “weak” first-order phase transitions, close to second-order phase transitions, with a small jump value (Delta {{C}_{p}}) in GdB6, and the behavior ({{C}_{p}}(T)) in a wide vicinity ({{T}_{N}}) is well described by critical indices ({{gamma }_{i}}) (i = AF and P), which are typical for (lambda )-anomalies. For NdB6 and GdB6 ({{gamma }_{{{text{AF}}}}}) and ({{gamma }_{{text{P}}}}) take values ( - (1{-} 1.4)), found in various models for “pure” second-order phase transitions. In strong fields up to 90 kOe, critical values significantly deviate from the model values. For TbB6 ({{gamma }_{{{text{AF}}}}}), ({{gamma }_{{text{P}}}} sim - 2) received, indicating a more pronounced “magnitude of 1st order transition” effect.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 6","pages":"439 - 444"},"PeriodicalIF":1.1,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309565","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

Shot Noise Features of a Terahertz Superconducting Bolometer 太赫兹超导辐射热计的散粒噪声特性

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026607712

P. A. Prudkovskii

引用次数: 0

Mid-Circuit Measurement of Optical Qubits in 171Yb+ Ions Using the 2D3/2 Hyperfine Structure 利用2D3/2超精细结构在171Yb+离子中路测量光学量子比特

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026608389

K. P. Galstyan, I. V. Zalivako, N. N. Kolachevsky

{"title":"Mid-Circuit Measurement of Optical Qubits in 171Yb+ Ions Using the 2D3/2 Hyperfine Structure","authors":"K. P. Galstyan, I. V. Zalivako, N. N. Kolachevsky","doi":"10.1134/S0021364026608389","DOIUrl":"10.1134/S0021364026608389","url":null,"abstract":"Mid-circuit measurement of individual qubits is a necessary element in the implementation of quantum error correction protocols and allows for the reduction of resource requirements for the execution of a number of quantum algorithms. In this paper, we present a protocol for mid-circuit measurement of qubits implemented at an optical transition (^{2}{{S}_{{1/2}}}(F = 0,{{m}_{F}} = 0){{ to }^{2}}{{D}_{{3/2}}}(F = 2,{{m}_{F}} = 0)) in ions 171Yb+. The proposed protocol enables selective measurement of a subset of qubits (target qubits) without destroying the state of the rest (spectator qubits). The method involves the use of an auxiliary state (^{2}{{D}_{{3/2}}}(F = 1)), as well as a spin echo technique to maintain the coherence of the spectator qubits during the operation. The average reliability of the target qubit measurement operation of 98.2(1)% was experimentally demonstrated, while maintaining the amplitude of Ramsey oscillations on the spectator qubit at least 95.2(6)%. The proposed method does not require the movement of ions or the complication of the addressing system, due to which it can be implemented in a chain of ions of one type and easily integrated into existing quantum processors based on 171Yb+. The capabilities of the developed protocol are demonstrated by an experimental implementation of CNOT gate teleportation.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 6","pages":"472 - 480"},"PeriodicalIF":1.1,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364026608389.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamics of a System of Hard Spheres 硬球系统的热力学

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-11-05 DOI: 10.1134/S0021364026607736

A. M. Dyugaev, E. V. Lebedeva, P. D. Grigoriev

{"title":"Thermodynamics of a System of Hard Spheres","authors":"A. M. Dyugaev, E. V. Lebedeva, P. D. Grigoriev","doi":"10.1134/S0021364026607736","DOIUrl":"10.1134/S0021364026607736","url":null,"abstract":"Based on the analysis of the results obtained by the numerical Monte Carlo method for a system of hard spheres, it was established that the quantum contribution to its energy (E), calculated for one particle increases with increasing temperature (T) how (sqrt T ): (E = frac{3}{2}T + delta {{({{varepsilon }_{0}}T)}^{{1/2}}}), ({{varepsilon }_{0}} = frac{{{{h}^{2}}}}{{2pi M{{sigma }^{2}}}}); where (M) and (sigma )—mass and diameter of spheres, (delta ) is a parameter depending on the density of the system of hard spheres. This contribution is proportional to the first power of Planck’s constant (h). The interpolation formula for heat capacity is substantiated ({{C}_{V}}): ({{C}_{V}}(lambda ) = frac{3}{2} + frac{delta }{2}lambda (1 - {{lambda }^{2}})), where (lambda ) is the ratio of the wavelength of the particles to their diameter: (lambda = ({{varepsilon }_{0}}{text{/}}T{{)}^{{1/2}}}). At (lambda = 1) ({{C}_{V}}) for the system of hard spheres has a fan-shaped point dividing the regions of high (T > {{varepsilon }_{0}}) and low (T < {{varepsilon }_{0}}) temperature. The result was a comparison of the model system with a physical liquid 4He, for whom such a fan-shaped point is visible in the experiment. Near this point, the model system and liquid 4He They have the same linear pressure dependence (P) from temperature T, characteristic of an ideal gas, as well as the same dependence of entropy on dimensionless density.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 6","pages":"453 - 458"},"PeriodicalIF":1.1,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309637","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

Thermoelectric and Magnetic Properties of Polycrystalline Cu11TM1Sb4S13 (TM = Mn, Fe, Co, Ni) Compounds with the p-Type Conductivity 具有p型电导率的多晶Cu11TM1Sb4S13 （TM = Mn, Fe, Co, Ni）化合物的热电和磁性能

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-10-18 DOI: 10.1134/S0021364026607438

E. V. Argunov, D. Yu. Karpenkov, A. Yu. Levakhova, A. Yu. Tsvetkov, K. A. Shcherbakova, E. V. Chernyshova, I. V. Andreev, O. A. Podchasov, A. V. Bogach, Yu. M. Kuznetsov, M. V. Dorokhin, A. V. Zdoroveishev

{"title":"Thermoelectric and Magnetic Properties of Polycrystalline Cu11TM1Sb4S13 (TM = Mn, Fe, Co, Ni) Compounds with the p-Type Conductivity","authors":"E. V. Argunov, D. Yu. Karpenkov, A. Yu. Levakhova, A. Yu. Tsvetkov, K. A. Shcherbakova, E. V. Chernyshova, I. V. Andreev, O. A. Podchasov, A. V. Bogach, Yu. M. Kuznetsov, M. V. Dorokhin, A. V. Zdoroveishev","doi":"10.1134/S0021364026607438","DOIUrl":"10.1134/S0021364026607438","url":null,"abstract":"In this work, for the first time, a comprehensive experimental and theoretical study was carried out on the influence of copper substitution with magnetically active metals TM = Mn, Fe, Co, Ni on the thermoelectric and magnetic properties of tetrahedrites of the composition Cu11TM1Sb4S13. Maximum value of thermoelectric figure of merit (z{{T}_{{max }}} = 1.34) at 735 K was achieved for the unalloyed sample. It was established that doping (3d)-metals leads to a decrease (zT) due to a decrease in electrical conductivity and an increase in thermal conductivity. Experimental data show that with decreasing charge number (3d)-ion, an increase in the magnetic moment at the substitution position is observed. However, for the entire series of compositions, no significant increase in magneto-thermoEMF was detected. The calculations carried out within the framework of the density functional theory qualitatively reproduce the experimental data and confirm that the contribution of spin entropy, magnon drag and other spin-caloritron mechanisms to the thermoelectric properties in tetrahedrites with substitutions 3d-metals is insignificant.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 5","pages":"373 - 379"},"PeriodicalIF":1.1,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214597","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

Account for the Final State Interaction in Meson Production Processes 解释介子产生过程中的最终态相互作用

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-10-18 DOI: 10.1134/S0021364026607505

M. N. Platonova, O. A. Rubtsova

{"title":"Account for the Final State Interaction in Meson Production Processes","authors":"M. N. Platonova, O. A. Rubtsova","doi":"10.1134/S0021364026607505","DOIUrl":"10.1134/S0021364026607505","url":null,"abstract":"A generalization of the Fäldt–Wilkin formalism, which relates the meson production cross sections with the emission of a deuteron to those with the emission of a nucleon pair in the final state, is proposed for higher excitation energies of the final pair of nucleons. To derive the relationship between the cross sections, a model of interaction with an additional non-nucleon channel is used, in which the relationship between the corresponding amplitudes is determined by the energy dependence of the non-nucleon component of the (NN)-system wavefunction. It is shown that the obtained cross section ratio is practically independent of the interaction model at excitation energies of the nucleon pair from 0 to 40–50 MeV. As an example, the ratios of total and differential cross sections of the reaction (pp to pn{{pi }^{ + }}) to the corresponding cross sections of (pp to d{{pi }^{ + }}) are considered. It is shown that the proposed generalized formalism for taking into account the final-state interaction of nucleons describes well the experimental data at energies of incident protons below 600 MeV.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 5","pages":"328 - 335"},"PeriodicalIF":1.1,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364026607505.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ghost Imaging Microscopy with Pseudo-Thermal Light 伪热光鬼影成像显微镜

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-10-18 DOI: 10.1134/S002136402660761X

A. M. Vyunishev, N. N. Davletshin, A. S. Chirkin

引用次数: 0