Journal of Low Temperature Physics最新文献_第4页

Light Channel Signal Analysis with the Lithium Molybdate Crystal R&D Detectors for AMoRE-II Experiments 用于AMoRE-II实验的钼酸锂晶体探测器光通道信号分析

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-12-13 DOI: 10.1007/s10909-024-03251-6

B. Sharma, S. C. Kim, W. T. Kim, B. Bhandari, B. Mailyan, M. B. Kim, Y. D. Kim, Y. H. Kim, H. J. Lee, M. H. Lee

{"title":"Light Channel Signal Analysis with the Lithium Molybdate Crystal R&D Detectors for AMoRE-II Experiments","authors":"B. Sharma, S. C. Kim, W. T. Kim, B. Bhandari, B. Mailyan, M. B. Kim, Y. D. Kim, Y. H. Kim, H. J. Lee, M. H. Lee","doi":"10.1007/s10909-024-03251-6","DOIUrl":"10.1007/s10909-024-03251-6","url":null,"abstract":"<div><p>This paper presents a comparative study of various light detectors (LDs) developed for different phases of the AMoRE neutrinoless double beta decay experiment. We analyze the performance of these detectors in terms of characteristics such as time response, light collection, and energy resolution. Our primary focus is on evaluating the performance of the AMoRE-II light detector, which is integral to the forthcoming AMoRE-II experiment. It is found that AMoRE-II type LDs outperform other previous light detector types. The best-performing LD exhibits FWHM energy resolution of 99, 198, 198, and 481 eV for baseline and <sup>55</sup>Fe X-ray energies of 5.9, 6.5, and 17.5 keV molybdenum X-ray, respectively. We adopted a convolution method to estimate the energy of the scintillation signals from 2.615 MeV gamma rays fully absorbed in a lithium molybdate crystal. The measured energy of scintillation light with AMoRE-II type LDs falls in the range of 2.1–2.5 keV, which corresponds to 0.80–0.96 keV/MeV. This measured energy is approximately 14–39<span>(%)</span> higher than that measured with previous LD types for the experiments.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 Part 5","pages":"92 - 100"},"PeriodicalIF":1.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Casimir Effect in Josephson Junctions 约瑟夫逊结中的卡西米尔效应

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-12-10 DOI: 10.1007/s10909-024-03254-3

Alex Levchenko

引用次数: 0

An Improved Infinite Time-Evolving Block Decimation Algorithm Applied to SU(N) Antiferromagnetic Heisenberg Chains 一种用于SU(N)反铁磁海森堡链的改进无限时变块抽取算法

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-27 DOI: 10.1007/s10909-024-03248-1

Jianjin Lin, Junjun Xu

引用次数: 0

Effect of Hydrostatic Pressure and Temperature on Thermodynamic Properties of Electron Gas in Narrow Bandgap Semiconductor Nanowires 静水压力和温度对窄带隙半导体纳米线中电子气体热力学性质的影响

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-27 DOI: 10.1007/s10909-024-03241-8

Abror Davlatov, Gafur Gulyamov, Elmustapha Feddi, Kawtar Feddi, Akram Khalmirzaev, Shukurillo Inoyatov

{"title":"Effect of Hydrostatic Pressure and Temperature on Thermodynamic Properties of Electron Gas in Narrow Bandgap Semiconductor Nanowires","authors":"Abror Davlatov, Gafur Gulyamov, Elmustapha Feddi, Kawtar Feddi, Akram Khalmirzaev, Shukurillo Inoyatov","doi":"10.1007/s10909-024-03241-8","DOIUrl":"10.1007/s10909-024-03241-8","url":null,"abstract":"<div><p>In this work, the patterns of changes in concentration, density of thermodynamic states, thermodynamic potential, entropy and heat capacity of electron gas under the influence of hydrostatic pressure and temperature were studied in nanowires in the form of a rectangular potential well, obtained on the basis of semiconductors with narrow bandgaps. The patterns of changes in the effective mass, nonparabolicity coefficient and energy levels of electron gas in nanowires under the influence of temperature and hydrostatic pressure are determined. An increase in the steepness and a narrowing between turns of oscillation were determined on the graph of the dependence of the chemical potential on thermodynamic quantities in semiconductor nanowires with increasing hydrostatic pressure. The decrease in the steepness and the expansion between oscillation cycles on the graph of the dependence of the chemical potential on the thermodynamic properties of the semiconductor nanowires with increasing temperature were determined. The disappearance of oscillations at high temperatures and the observation of oscillations at low temperatures are shown on the graph of the dependence of thermodynamic values on the chemical potential. The dependence of the concentration, density of thermodynamic states, thermodynamic potential, entropy and heat capacity of the electron gas in InAs nanowires, on the chemical potential and the energy level <span>(mu <E_{left( N,Lright) })</span>, <span>(mu =E_{left( N,Lright) })</span> and <span>(mu >E_{left( N,Lright) })</span> on the hydrostatic pressure and temperature are consistent.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 3-4","pages":"166 - 192"},"PeriodicalIF":1.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

(^3)He Viscosity Apart From Fermi Liquid Mode (^3)除费米液体模式外的He黏度

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-27 DOI: 10.1007/s10909-024-03247-2

Maxim Cheremisin

引用次数: 0

Development and Experimental Testing of a Differential Thermal Expansion Type Gas-Gap Heat Switch for Dilution Refrigerators 稀释冰箱用差热膨胀式气隙热开关的研制与实验测试

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-23 DOI: 10.1007/s10909-024-03243-6

Xiang Guan, Jie Fan, Yong Bo Bian, Zhi Gang Cheng, Zhong Qing Ji

{"title":"Development and Experimental Testing of a Differential Thermal Expansion Type Gas-Gap Heat Switch for Dilution Refrigerators","authors":"Xiang Guan, Jie Fan, Yong Bo Bian, Zhi Gang Cheng, Zhong Qing Ji","doi":"10.1007/s10909-024-03243-6","DOIUrl":"10.1007/s10909-024-03243-6","url":null,"abstract":"<div><p>The gas-gap heat switch, with its stability and reliability, high switching ratio, and a design that is simple, flexible, and easily scalable, has become the preferred option for efficient pre-cooling in various low-temperature devices such as dilution refrigerators. We have successfully developed a differential thermal expansion type of gas-gap heat switch. This paper details its basic principles, fabrication process, performance testing, and preliminary application in dilution refrigerator system. The typical thermal conductivity of the gas-gap heat switch in the temperature range of 4–30 K has been experimentally measured in both ON and OFF states, and the results are generally consistent with the calculated data. Tests in a dilution refrigerator with a cooling power of approximately 400 μW at 100 mK showed that the developed gas-gap heat switch assembly could perform its functions of thermal connection and disconnection properly and reduce the temperature of the still cold plate to about 7 K within roughly 24 h, significantly improving the original cooling time. Additionally, its heat leakage in the millikelvin temperature range does not affect the attainment of temperatures around 10 mK. Finally, combining the calculated results, we quantitatively analyzed the impact and feasible solutions for the performance improvement of this type of gas-gap heat switch. The research work presented in this paper is of reference value for efficient pre-cooling in dilution refrigerators and other low-temperature equipment.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 3-4","pages":"193 - 212"},"PeriodicalIF":1.1,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Study of Event Position Dependence for the AMoRE-II R&D detectors with (hbox {Li}_{2}hbox {MoO}_{4}) Crystal Absorbers 含有(hbox {Li}_{2}hbox {MoO}_{4})晶体吸收剂的AMoRE-II R＆D探测器的事件位置依赖性研究

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-19 DOI: 10.1007/s10909-024-03246-3

W. T. Kim, S. C. Kim, B. Sharma, Y. D. Kim, Y. H. Kim, M. H. Lee

{"title":"A Study of Event Position Dependence for the AMoRE-II R&D detectors with (hbox {Li}_{2}hbox {MoO}_{4}) Crystal Absorbers","authors":"W. T. Kim, S. C. Kim, B. Sharma, Y. D. Kim, Y. H. Kim, M. H. Lee","doi":"10.1007/s10909-024-03246-3","DOIUrl":"10.1007/s10909-024-03246-3","url":null,"abstract":"<div><p>The AMoRE collaboration conducts experiments to search for the neutrinoless double beta decay of <span>(^{100})</span>Mo using massive <span>(hbox {Li}_{2}hbox {MoO}_{4})</span> (LMO) crystals in a cryogenic calorimetric detection with metallic magnetic calorimeters (MMCs). The detector module incorporates a light detector with Si or Ge wafers, enabling the simultaneous detection of scintillation light. The forthcoming phase (AMoRE-II) of the experiment will include 6 cm (diameter) <span>(times)</span> 6 cm (height) LMO cylindrical crystals, and this has been chosen to reduce the number of crystals and sensors. Additionally, these crystals will have diffusive surfaces rather than polished ones, which helps to reduce the crystal preparation time. The phonon signal of crystals with diffusive surfaces is slower than that of polished crystals. However, due to the mitigated position dependence, diffusive crystals exhibit better discrimination between <span>(alpha)</span> and <span>(beta)</span>/<span>(gamma)</span> signals by pulse shape analysis. We also found that muon events show two bands in the rise time of the large LMO crystal with polished surface, indicating the muon passage at the edge of the crystal, and the band structure is significantly mitigated in the crystals with the diffusive surfaces. To study the position dependence in the crystal absorber further, we irradiated some R&D detectors with localized <span>(alpha)</span> sources. This paper discusses the particle identification and position dependence of <span>(gamma)</span>, <span>(alpha)</span>, and muon events for the large AMoRE-II type detectors based on the pulse shape analysis.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 Part 5","pages":"83 - 91"},"PeriodicalIF":1.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Turbulence Triggered by Counterflow in a Connecting Tube 由连接管内逆流引发的量子湍流

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-18 DOI: 10.1007/s10909-024-03237-4

Ken Obara, Kuwahira Kento, Satsuki Yoshisaka, Hideo Yano

引用次数: 0

Spin-Mixing Dynamics in Helicoidal Spin-Orbit-Coupled Bose–Einstein Condensates 螺旋自旋轨道耦合玻色-爱因斯坦凝聚态中的自旋混合动力学

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-18 DOI: 10.1007/s10909-024-03244-5

Golam Ali Sekh

引用次数: 0

Directional Control of Single-Photon Routing in Asymmetric Quantum Beam Splitter Based on the Additional Quantum Dot 基于附加量子点的非对称量子分束器中单光子路由的定向控制

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-11-18 DOI: 10.1007/s10909-024-03245-4

Jong-Ju Ri, Myong-Chol Ko, Su-Ryon Ri, Nam-Chol Kim, Ju-Song Ryom, Jong-Chol Ri, Luxia Wang

{"title":"Directional Control of Single-Photon Routing in Asymmetric Quantum Beam Splitter Based on the Additional Quantum Dot","authors":"Jong-Ju Ri, Myong-Chol Ko, Su-Ryon Ri, Nam-Chol Kim, Ju-Song Ryom, Jong-Chol Ri, Luxia Wang","doi":"10.1007/s10909-024-03245-4","DOIUrl":"10.1007/s10909-024-03245-4","url":null,"abstract":"<div><p>We propose a novel scheme of a directional quantum splitter using two two-level quantum dots (QDs), infinite and semi-infinite plasmonic waveguides, and theoretically illustrate the directional controllable routing properties, such as reflection and transfer spectra, in proposed model via real space approach when single photons are of entrance into the semi-infinite waveguide. We consider the reflection and transfer properties on controlling the impact of several parameters, such as inter-particle distance, coupling strength, detuning and so on. The characteristics of our investigation is that when the frequency of the incoming single photon are nearly similar to one of eigenfrequencies of an additional QD, our proposed the system acts as a directional quantum splitter with a high transfer ratio toward the specific path. That is, the incident single photons could be come out of only one side of infinite waveguide with the transfer rate of over 0.5 because the additional QD absorbs the energy of single photons through the coherent interaction. These properties could be unlocked new opportunities to realize the quantum communication networks and quantum computation systems based on practical single-photon switch or quantum logic gates.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 3-4","pages":"224 - 238"},"PeriodicalIF":1.1,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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