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Double quantum dot spin resonances with a time-dependent spin-orbit coupling 具有随时间变化的自旋轨道耦合的双量子点自旋共振
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-02-22 DOI: 10.1063/10.0024326
G. Giavaras
{"title":"Double quantum dot spin resonances with a time-dependent spin-orbit coupling","authors":"G. Giavaras","doi":"10.1063/10.0024326","DOIUrl":"https://doi.org/10.1063/10.0024326","url":null,"abstract":"Two-spin resonances in double quantum dots with a constant spin-orbit coupling (SOC) can be induced by an ac field which periodically modulates the energy detuning. But a large ac field amplitude may unintentionally trigger an ac modulation in the SOC, which in turn can alter the frequency of the resonances and the form of the current peaks. Here, we demonstrate that depending on the applied magnetic field and the double quantum dot parameters a weak time dependence in the SOC can have a completely different effect on the resonant peaks; in particular, it can enhance the peaks, but it can also completely suppress them.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"20 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945925","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
Luminescent monitoring the state of dichroic complexes in polaroids based on polyvinyl alcohol 用荧光监测基于聚乙烯醇的偏光片中二色性复合物的状态
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023886
A. V. Tyurin, S. A. Zhukov, A. Yu. Akhmerov
{"title":"Luminescent monitoring the state of dichroic complexes in polaroids based on polyvinyl alcohol","authors":"A. V. Tyurin, S. A. Zhukov, A. Yu. Akhmerov","doi":"10.1063/10.0023886","DOIUrl":"https://doi.org/10.1063/10.0023886","url":null,"abstract":"In this work, to control the content of dichroic complexes in film polarizers based on polyvinyl alcohol, a luminescent technique is proposed that allows us to estimate: the ratio of molecular and paired iodine centers in H-type polarizers at T = 4.2 K; of dichroic complexes caused by molecular and aggregated forms of the dye in L-type polarizers at T = 300 K. The use of this technique will make it possible in the future to establish the dependence of the properties of polarizers on the structure of dichroic complexes, not only in H-type or L-type film polarizers but also in mixed (H + L)-type polarizers, to create polarizers of various spectral ranges.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"270 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459558","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
Reduction of g2(0) value in heralded spontaneous parametric down-conversion sources using photon number resolving detectors 利用光子数解析探测器降低预示自发参量下转换源中的 g2(0) 值
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023887
C. Bruscino, M. Ejrnaes, P. Ercolano, D. Salvoni, C. Zhang, H. Li, L. You, L. Parlato, G. P. Pepe
{"title":"Reduction of g2(0) value in heralded spontaneous parametric down-conversion sources using photon number resolving detectors","authors":"C. Bruscino, M. Ejrnaes, P. Ercolano, D. Salvoni, C. Zhang, H. Li, L. You, L. Parlato, G. P. Pepe","doi":"10.1063/10.0023887","DOIUrl":"https://doi.org/10.1063/10.0023887","url":null,"abstract":"Single Photon Sources (SPSs) play a pivotal role in fields such as quantum communication and quantum cryptography by generating information in a secure manner. However, realizing the ideal emission of single photons with high efficiency is still a theoretical model. This leads to the presence of multiphoton components in SPSs, which could potentially compromise security. This study focuses on enhancing the purity of a class of sources by characterizing their photon number distribution and mitigating the impact of the multiphoton components. We propose the use of Photon Number Resolving Detectors (PNRD) as a technique to exclude multiphoton contributions, particularly in sources like Spontaneous Parametric Down Conversion sources, where emitted photons can be represented as Two-Mode Squeezed Vacuum states. By analyzing the second-order cross-correlation function, g2(0), using either PNRD or Single Photon Detectors, we can quantify the reduction in multiphoton contributions.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"162 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459804","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
Design of deeply cooled ultra-low dissipation amplifier and measuring cell for quantum measurements with a microwave single-photon counter 设计用于微波单光子计数器量子测量的深冷超低耗散放大器和测量单元
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023896
O. G. Turutanov, A. M. Korolev, V. I. Shnyrkov, A. P. Shapovalov, M. Baránek, S. Kern, V. Yu. Lyakhno, P. Neilinger, M. Grajcar
{"title":"Design of deeply cooled ultra-low dissipation amplifier and measuring cell for quantum measurements with a microwave single-photon counter","authors":"O. G. Turutanov, A. M. Korolev, V. I. Shnyrkov, A. P. Shapovalov, M. Baránek, S. Kern, V. Yu. Lyakhno, P. Neilinger, M. Grajcar","doi":"10.1063/10.0023896","DOIUrl":"https://doi.org/10.1063/10.0023896","url":null,"abstract":"The requirements and details of designing a measuring cell and low-back-action deeply-cooled amplifier for quantum measurements at 10 mK are discussed. This equipment is a part of a microwave single-photon counter based on a superconducting flux qubit. The high-electron mobility transistors (HEMTs) in the amplifier operate in unsaturated microcurrent regime and dissipate only 1 μW of dc power per transistor. Simulated amplifier gain is 15 dB at 450 MHz with a high-impedance (≈ 5 kΩ) signal source and standard 50-Ω output.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"53 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459358","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
Comparative study on the effect of substrates on electrical properties of tin and chromium thin films 基底对锡和铬薄膜电气性能影响的比较研究
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023890
S. Udachan, S. B. Kolavekar, N. H. Ayachit, L. A. Udachan, S. Siddanna, S. S. Kolkundi, K. Naveen Kumar
{"title":"Comparative study on the effect of substrates on electrical properties of tin and chromium thin films","authors":"S. Udachan, S. B. Kolavekar, N. H. Ayachit, L. A. Udachan, S. Siddanna, S. S. Kolkundi, K. Naveen Kumar","doi":"10.1063/10.0023890","DOIUrl":"https://doi.org/10.1063/10.0023890","url":null,"abstract":"In thin film technology, substrate materials happen to be one of the deposition parameters that determine the physical properties of films. Hence, soda-lime glass and quartz continue to be the widely utilized substrate materials because of their high-frequency performance, price, and surface quality. For certain applications, various substrate materials that provide an acceptable compromise for the work at hand are required. Soda-lime glass and quartz have been chosen as the substrates for the tin and chromium thin films that will be produced via thermal evaporation in a vacuum. A comparative study on the electrical properties of chromium films was made in the light of Fuchs–Sondheimer and Mayadas–Shatzkes theories. Numerous physical properties, including resistivity of infinitely thick film, sticking coefficient, conduction electron mean free, etc., may be determined from resistivity-thickness data.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"6 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459421","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
Low-temperature anomalies of the dielectric permeability of Sn2P2S6 crystals Sn2P2S6 晶体介电渗透率的低温反常现象
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023893
H. Ban, D. Gal, A. Kohutych, A. Molnar
{"title":"Low-temperature anomalies of the dielectric permeability of Sn2P2S6 crystals","authors":"H. Ban, D. Gal, A. Kohutych, A. Molnar","doi":"10.1063/10.0023893","DOIUrl":"https://doi.org/10.1063/10.0023893","url":null,"abstract":"Low-temperature anomalies of dielectric permittivity of Sn2P2S6 crystals were investigated. It is shown that these phenomena have a relaxation character and the observed anomalies could be related to the small hole polarons dynamics with donor-acceptor compensation processes in lattice with tin and sulfur vacancies. To confirm it, we measured the dielectric properties of tin-enriched and sulfur-enriched crystals. It is shown that deviation from stoichiometry leads to a significant change in the low-temperature anomalies of dielectric losses.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"21 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459812","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
Thermomagnetoelectric convective effect in normal and superfluid systems 正常和超流体系统中的热磁电对流效应
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023883
O. M. Konstantynov
{"title":"Thermomagnetoelectric convective effect in normal and superfluid systems","authors":"O. M. Konstantynov","doi":"10.1063/10.0023883","DOIUrl":"https://doi.org/10.1063/10.0023883","url":null,"abstract":"Thermomagnetoelectric effect for the dielectric hydrodynamic system is considered. It is established that in a liquid, which is placed in a magnetic field, the temperature gradient can cause a convective mass flow, which leads to the appearance of an electric field in the surrounding space. The distribution of electric potential for various geometric implementations is calculated. A comparison of the obtained effect for normal and superfluid 4He is performed.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"2 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459349","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
Cryovacuum facilities for studying astrophysical ices 用于研究天体物理冰的低温真空设施
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023894
O. Golikov, D. Yerezhep, A. Akylbayeva, D. Sokolov, E. Korshikov, A. Aldiyarov
{"title":"Cryovacuum facilities for studying astrophysical ices","authors":"O. Golikov, D. Yerezhep, A. Akylbayeva, D. Sokolov, E. Korshikov, A. Aldiyarov","doi":"10.1063/10.0023894","DOIUrl":"https://doi.org/10.1063/10.0023894","url":null,"abstract":"This work introduces a cryovacuum apparatus used to investigate substances under near-space conditions. This device allows one to study the refractive index, infrared spectra, and density of substances that are condensed from the vapor phase onto a cooled substrate at temperatures ranging from 11 K to 300 K. Concurrently, the ultimate pressure of 0.1 nTorr can be obtained in the vacuum chamber. The introduced setup utilizes FTIR spectroscopy with a spectral measurement range of 400–7800 cm−1 and laser interference needed to determine the important physical and optical parameters. Several experiments allow us to stress that the data acquired using this apparatus are quite similar to those obtained by other researchers. Because of the non-directional deposition of substances from the vapor phase, the ice formed closely resembles the ice formed in space. This makes the introduced setup particularly useful. It is possible to use the presented cryovacuum apparatus to interpret data acquired in the course of astrophysical observations, allowing a researcher to determine the properties of space objects.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"8 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459357","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
The influence of the condensation rate on the structure of Cu-Mo pseudoalloys 冷凝速率对铜-钼假合金结构的影响
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023891
V. Riaboshtan, A. Zubkov, M. Zhadko, E. Zozulya, E. Zubarev
{"title":"The influence of the condensation rate on the structure of Cu-Mo pseudoalloys","authors":"V. Riaboshtan, A. Zubkov, M. Zhadko, E. Zozulya, E. Zubarev","doi":"10.1063/10.0023891","DOIUrl":"https://doi.org/10.1063/10.0023891","url":null,"abstract":"The structure and microhardness of Cu-0.3 at. % Mo vacuum condensates obtained at different deposition rates, both in the initial state and after isothermal annealings carried out up to 800 °C, were studied in the work. It has been established that molybdenum has a dispersing effect on the grain structure of the copper matrix, which consists of the blocking effect of monoatomic molybdenum adsorption layers formed on the surface of growing copper grains during the condensation of a two-component vapor. The structure of Cu-0.3 at. % Mo condensates demonstrates increased thermal stability, retaining the size of the original grain upon annealing up to 800 °C. The thermal stabilization of the grain structure of condensates is explained by the influence of grain-boundary segregations of molybdenum atoms and particles, which reduce the free energy of grain boundaries and the rate of their migration.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"74 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459388","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
Growth and crystal structure of CdTe1−xSex (x ≥ 0.75) thin films prepared by the method of high-frequency magnetron sputtering 高频磁控溅射法制备的 CdTe1-xSex (x ≥ 0.75) 薄膜的生长和晶体结构
IF 0.8 4区 物理与天体物理
Low Temperature Physics Pub Date : 2024-01-11 DOI: 10.1063/10.0023888
A. I. Kashuba, B. Andriyevsky
{"title":"Growth and crystal structure of CdTe1−xSex (x ≥ 0.75) thin films prepared by the method of high-frequency magnetron sputtering","authors":"A. I. Kashuba, B. Andriyevsky","doi":"10.1063/10.0023888","DOIUrl":"https://doi.org/10.1063/10.0023888","url":null,"abstract":"CdTe1–xSex (x = 0.75 and 0.95) thin films were deposited on quartz substrate by the method of high-frequency magnetron sputtering. The chemical composition analysis and crystal structure refinement was examined with using X-ray fluorescence spectroscopy and X-ray diffraction data. CdTe1–xSex thin films crystallizes in hexagonal structure [structure type—ZnO, space group P63mc (No. 186)]. Unit cell parameters decrease with increasing Se content in CdTe1–xSex thin films. The value of the optical band gap for CdTe0.25Se0.75 and CdTe0.05Se0.95 was estimating using the Tauc plot and from the maximum position of the first derivative of the transmittance dT/dλ.","PeriodicalId":18077,"journal":{"name":"Low Temperature Physics","volume":"47 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139459319","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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