Journal of Low Temperature Physics最新文献_第8页

A Vacuum Waveguide Filter Bank Spectrometer for Far-Infrared Astrophysics 用于远红外天体物理学的真空波导滤波器组光谱仪

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-05 DOI: 10.1007/s10909-024-03166-2

Rong Nie, Jeffrey Filippini, Elyssa Brooks, Peter Barry, Jake Connors, Marcin Gradziel, Dale Mercado, Vesal Razavimaleki, Erik Shirokoff, Locke Spencer, Serena Tramm, Neil Trappe, Michael Zemcov

引用次数: 0

Contribution of Andreev Reflection to the Mobility of Surface State Electrons on Superfluid (^3)He-B 安德烈耶夫反射对超流体 $$^3$$ He-B 表面态电子迁移率的贡献

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-05 DOI: 10.1007/s10909-024-03161-7

Yasumasa Tsutsumi, Hiroki Ikegami, Kimitoshi Kono

{"title":"Contribution of Andreev Reflection to the Mobility of Surface State Electrons on Superfluid (^3)He-B","authors":"Yasumasa Tsutsumi, Hiroki Ikegami, Kimitoshi Kono","doi":"10.1007/s10909-024-03161-7","DOIUrl":"10.1007/s10909-024-03161-7","url":null,"abstract":"<div><p>The mobility of the Wigner solid on the free surface of superfluid <span>(^3)</span>He is determined by the momentum transfer from the scattered <span>(^3)</span>He quasiparticles at the free surface. The scattering process of the quasiparticles is classified into the normal reflection and the Andreev retroreflection. Since the quasiparticles nearly conserve the momentum in the process of the Andreev retroreflection at the free surface, the Andreev-reflected quasiparticles do not produce a resistive force to the Wigner solid. In this report, we have analytically calculated the contribution of the Andreev retroreflection to the mobility of the Wigner solid on superfluid <span>(^3)</span>He-B by employing a realistic model order parameter with the free surface. The Andreev retroreflection is absent for quasiparticles with energies above the bulk energy gap under the model order parameter. Then, the Andreev retroreflection does not contribute to a rise in the mobility of the Wigner solid on the superfluid <span>(^3)</span>He-B. The present model calculation is in good agreement with the previous experimental observation. We have also discussed the Andreev retroreflection under a self-consistently calculated order parameter.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"217 1-2","pages":"279 - 291"},"PeriodicalIF":1.1,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259458","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

Andreev reflection, Andreev states, and long ballistic SNS junction 安德烈耶夫反射、安德烈耶夫态和长弹道 SNS 结

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-04 DOI: 10.1007/s10909-024-03137-7

Edouard Sonin

{"title":"Andreev reflection, Andreev states, and long ballistic SNS junction","authors":"Edouard Sonin","doi":"10.1007/s10909-024-03137-7","DOIUrl":"10.1007/s10909-024-03137-7","url":null,"abstract":"<div><p>The analysis in the present paper is based on the most known concept introduced by the brilliant physicist Alexander Andreev: Andreev bound states in a normal metal sandwiched between two superconductors. The paper presents results of direct calculations of ab initio expressions for the currents in a long ballistic SNS junction. The expressions are expanded in 1/<i>L</i> (<i>L</i> is the thickness of the normal layer). The main contribution <span>(propto 1/L)</span> to the current agrees with the results obtained in the past, but the analysis suggests a new physical picture of the charge transport through the junction free from the problem with the charge conservation law. The saw-tooth current-phase relation at <span>(T=0)</span> directly follows from the Galilean invariance of the Bogolyubov–de Gennes equations proved in the paper. The proof is valid for any variation of the energy gap in space if the Andreev reflection is the only scattering process. The respective roles of the contributions of bound and continuum states to the current are clarified. They depend on the junction dimensionality.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"217 1-2","pages":"24 - 53"},"PeriodicalIF":1.1,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-024-03137-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Preface: 2023 International Symposium on Quantum Fluids and Solids (QFS2023) 前言：2023 年量子流体与固体国际研讨会（QFS2023）

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-04 DOI: 10.1007/s10909-024-03167-1

Andrei Golov, Paul Walmsley

引用次数: 0

Majorana Fermions as Andreev Bound States in Superfluid (^3)He-B 超流体 $$^3$$ He-B 中作为安德烈耶夫束缚态的马约拉纳费米子

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-02 DOI: 10.1007/s10909-024-03159-1

Yury Bunkov

引用次数: 0

Developments on Frequency Domain Multiplexing Readout for Large Arrays of Transition-Edge Sensor X-ray Micro-calorimeters 用于大型阵列过渡边缘传感器 X 射线微量热仪的频域复用读出技术的发展

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-01 DOI: 10.1007/s10909-024-03099-w

D. Vaccaro, H. Akamatsu, L. Gottardi, M. de Wit, M. P. Bruijn, J. van der Kuur, K. Nagayoshi, E. Taralli, K. Ravensberg, J.-R. Gao, J. W. A. den Herder

{"title":"Developments on Frequency Domain Multiplexing Readout for Large Arrays of Transition-Edge Sensor X-ray Micro-calorimeters","authors":"D. Vaccaro, H. Akamatsu, L. Gottardi, M. de Wit, M. P. Bruijn, J. van der Kuur, K. Nagayoshi, E. Taralli, K. Ravensberg, J.-R. Gao, J. W. A. den Herder","doi":"10.1007/s10909-024-03099-w","DOIUrl":"10.1007/s10909-024-03099-w","url":null,"abstract":"<div><p>At SRON, we have been developing X-ray TES micro-calorimeters as backup technology for the X-ray Integral Field Unit (X-IFU) of the Athena mission, demonstrating excellent resolving powers both under DC and AC bias. We also developed a frequency-domain multiplexing (FDM) readout technology, where each TES is coupled to a superconducting band-pass LC resonator and AC biased at MHz frequencies through a common readout line. The TES signals are summed at the input of a superconducting quantum interference device (SQUID), which performs a first amplification at cryogenic stage. Custom analog front-end electronics and digital boards take care of further amplifying the signals at room temperature and of the modulation/demodulation of the TES signals and bias carrier, respectively. We report on the most recent developments on our FDM technology, which involves a two-channel demonstration with a total of 70 pixels with a summed energy resolution of 2.34 ± 0.02 eV at 5.9 keV without spectral performance degradation with respect to single-channel operation. Moreover, we discuss prospects towards the scaling-up to a larger multiplexing factor up to 78 pixels per channel in a 1–6 MHz readout bandwidth.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"216 Part 3","pages":"21 - 28"},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190812","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 Tunable Blackbody Polarized Infrared Source for the B-BOP Camera 用于 B-BOP 摄像机的可调黑体偏振红外光源

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-06-01 DOI: 10.1007/s10909-024-03164-4

Xavier-François Navick, Jérôme Martignac, Albrecht Poglitsch, Vincent Revéret, Louis Rodriguez, Timothée Tollet, François Visticot

引用次数: 0

Electronic Structure of Pinned Abrikosov Vortices: Andreev Theory of Quasiparticle Bound States 针状阿布里科索夫漩涡的电子结构：准粒子边界态的安德烈耶夫理论

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-05-28 DOI: 10.1007/s10909-024-03155-5

A. S. Mel’nikov, A. V. Samokhvalov

引用次数: 0

Modeling and Analysis of Flow Through the Orifice of Still in Dilution Refrigerator 稀释冰箱蒸馏器孔口流量建模与分析

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-05-28 DOI: 10.1007/s10909-024-03157-3

De-Ming Wang, Wei-Pei Cha, Wei-Dong Ding, Dong-Ming Xu, Wan-Long Han, Jian-Xin Lu, Qin Zhan

{"title":"Modeling and Analysis of Flow Through the Orifice of Still in Dilution Refrigerator","authors":"De-Ming Wang, Wei-Pei Cha, Wei-Dong Ding, Dong-Ming Xu, Wan-Long Han, Jian-Xin Lu, Qin Zhan","doi":"10.1007/s10909-024-03157-3","DOIUrl":"10.1007/s10909-024-03157-3","url":null,"abstract":"<div><p>The cooling capacity of a typical dilution refrigerator is mainly determined by the circulating flow of the He-3 in the system, which is usually realized by the external circulation pump. In order to increase the concentration of circulating He-3, the still often take the orifice structure to limit the influence of the superfluid helium film, and this structure will also have a certain impact on the flow rate of He-3. This paper summarizes the flow rate models of each part of the orifice structure, and establishes a model related to the influence of pumping speed and the diameter of orifice on the flow rate of circulating He-3. The relationship between pumping speed and flow rate is developed and the relation is divided into three phases for detailed analysis. It is found that the flow rate and the concentration of circulating He-3 increase first and then decrease with the increasing diameter of orifice at a certain pumping speed, and the possible reasons for this phenomenon are analyzed. The results indicate that there is an optimal orifice diameter at a determined pumping speed.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"216 3-4","pages":"469 - 482"},"PeriodicalIF":1.1,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169339","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

Update on X-ray Microcalorimeter Arrays Based on Thermal MKIDs (TKIDs) 基于热 MKID（TKID）的 X 射线微量热仪阵列的最新进展

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2024-05-27 DOI: 10.1007/s10909-024-03134-w

Miguel Daal, W. Hawkins Clay, Majid Mohammad, Benjamin Mazin

引用次数: 0