Journal of Low Temperature Physics最新文献_第6页

Studies of Hydrogen Atom Recombination in Solid Hydrogen Deuteride 固体氘化氢中氢原子重组的研究

IF 1.4 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-25 DOI: 10.1007/s10909-025-03281-8

C. K. Wetzel, D. M. Lee, S. Sheludiakov, J. Ahokas, S. Vasiliev, V. V. Khmelenko

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Structure of a Single-Quantum Vortex in 3He-A 3He-A中单量子涡旋的结构

IF 1.4 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-18 DOI: 10.1007/s10909-025-03279-2

Riku Rantanen, Erkki Thuneberg, Vladimir Eltsov

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Correction: Benefits of the Use of Monte Carlo Simulations in Cryogenic Detector Design 更正：在低温探测器设计中使用蒙特卡罗模拟的好处

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-15 DOI: 10.1007/s10909-025-03287-2

Simone Lotti, Matteo D’Andrea, Claudio Macculi, Luigi Piro, Caroline Kilbourne, Dan McCammon, Ralph Kraft

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Revisiting the properties of superfluid and normal liquid 4He using ab initio potentials 用从头算势重新考察超流体和正常液体的性质

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-15 DOI: 10.1007/s10909-025-03283-6

Tommaso Morresi, Giovanni Garberoglio

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Nambu-Goldstone Modes in Two Segregated Bose-Einstein Condensates Limited by a Hard Wall 受硬壁限制的两个分离玻色-爱因斯坦凝聚体中的Nambu-Goldstone模

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-12 DOI: 10.1007/s10909-025-03285-4

Hoang Van Quyet

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Some Thermomechanical Properties of an FCC Helium Cryocrystal FCC氦晶体的一些热力学性质

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-06 DOI: 10.1007/s10909-025-03276-5

Hoc Quang Nguyen, Dat Xuan Hua, Linh Thi Mai Le, En Hai Le, Loan Thi Hoang, Nhung Le Hoang, Phuc Van Tran

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Insights into Magnetic Properties of an Ising Nanoisland with Four-Spin and Next-Nearest Neighbor Interactions 透视具有四针和近邻相互作用的等效纳米岛的磁特性

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-05 DOI: 10.1007/s10909-025-03278-3

M. Mouhib, A. El Fadl, S. Bri, MD. Belrhiti, H. Mounir

{"title":"Insights into Magnetic Properties of an Ising Nanoisland with Four-Spin and Next-Nearest Neighbor Interactions","authors":"M. Mouhib, A. El Fadl, S. Bri, MD. Belrhiti, H. Mounir","doi":"10.1007/s10909-025-03278-3","DOIUrl":"10.1007/s10909-025-03278-3","url":null,"abstract":"<div>We propose a multi-spin Ising model to report a computational study of a mixed spin-1 and spin-1/2 ferrimagnetic nanoisland. Employing the finite cluster approximation (FCA), we thoroughly examine how the four-spin interaction, next-nearest neighbor interaction, and crystal field affect the phase diagrams and the magnetic properties including magnetizations, internal energy, and specific heat. The exact calculations derived from the Hamiltonian at the ground state (T = 0) reveal the existence of a critical equation, J′ + J4 = − 4Js delimiting two distinct ground states (I) and (II). Phase diagrams analysis shows that the transition temperature Tc trends toward a tricritical point as the four-spin interaction J4 varies, without evidence of compensation phenomena; while the next-nearest neighbor interaction J' leads to the manifestation of compensation points only if J′ surpasses a Js-dependent threshold value. Interestingly, when the crystal field DS is inserted, one, two, or three compensation points may emerge according to the strength of J′.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 1-2","pages":"43 - 58"},"PeriodicalIF":1.1,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784084","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

Density of States of the Hubbard Model Supplemented with the Quantizing Magnetic Field 外加量子化磁场的Hubbard模型的态密度

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-03-05 DOI: 10.1007/s10909-025-03280-9

Alexei Sherman

{"title":"Density of States of the Hubbard Model Supplemented with the Quantizing Magnetic Field","authors":"Alexei Sherman","doi":"10.1007/s10909-025-03280-9","DOIUrl":"10.1007/s10909-025-03280-9","url":null,"abstract":"<div>Using the strong coupling diagram technique, we calculate the zero-temperature density of states (rho) of electrons on a square lattice immersed in a perpendicular uniform magnetic field. The electrons are described by Hubbard Hamiltonian. For moderate doping, Landau subbands are observed for small Hubbard repulsions U only. For larger U, the subbands are blurred. Instead, small peaks varying with the field induction B arise by opening the Mott gap in its vicinity. The related variation of (rho) with 1/B may be connected with the low-frequency quantum oscillations in lightly doped cuprates. For all considered repulsions, (rho) has gaps near transfer frequencies of the Hubbard atom, (-mu) and (U-mu), with (mu) the chemical potential. In the heavily underdoped case (mu <0), Landau subbands are grouped into the lower and upper Hubbard subbands for moderate and large repulsions. The intensity of the upper Hubbard subband decreases with approaching the Fermi level to the lower edge of the spectrum and finally vanishes.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"219 1-2","pages":"59 - 76"},"PeriodicalIF":1.1,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784083","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

Evolution of Vortex Filaments and Reconnections in the Gross–Pitaevskii Equation and its Approximation by the Binormal Flow Equation Gross-Pitaevskii方程中涡丝和重连的演化及其双正态流动方程的近似

IF 1.4 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-21 DOI: 10.1007/s10909-025-03267-6

M. Arrayás, M. A. Fontelos, M. D. M. González, C. Uriarte

{"title":"Evolution of Vortex Filaments and Reconnections in the Gross–Pitaevskii Equation and its Approximation by the Binormal Flow Equation","authors":"M. Arrayás, M. A. Fontelos, M. D. M. González, C. Uriarte","doi":"10.1007/s10909-025-03267-6","DOIUrl":"10.1007/s10909-025-03267-6","url":null,"abstract":"<div>The evolution of a vortex line following the binormal flow equation (i.e. with a velocity proportional to the local curvature in the direction of the binormal vector) has been postulated as an approximation for the evolution of vortex filaments in both the Euler system for inviscid incompressible fluids and the Gross–Pitaevskii equation in superfluids. We address the issue of whether this is a suitable approximation or not and its degree of validity by using rigorous mathematical methods and direct numerical simulations. More specifically, we show that as the vortex core thickness goes to zero, the vortex core moves (at leading order and for long periods of time) with a velocity proportional to its local curvature and the binormal vector to the curve. The main idea of our analysis lies in a reformulation of the Gross–Pitaevskii equation in terms of associated velocity and vorticity fields that resemble the Euler system written in terms of vorticity in its weak form. We also present full numerical simulations aimed to compare Gross–Pitaevskii and binormal flow in various physical situations of interest such as the periodic evolution of deformed vortex rings and the reconnection of vortex filaments.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"220 1-2","pages":"61 - 74"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-025-03267-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168148","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

The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance MISTRAL仪器的低温系统：设计和实验室性能

IF 1.1 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2025-02-13 DOI: 10.1007/s10909-024-03263-2

A. Coppolecchia, A. Carbone, G. D’ Alessandro, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, E. Carretti, D. Ciccalotti, F. Columbro, A. Cruciani, M. De Petris, F. Govoni, G. Isopi, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu

{"title":"The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance","authors":"A. Coppolecchia, A. Carbone, G. D’ Alessandro, E. Barbavara, E. S. Battistelli, P. de Bernardis, F. Cacciotti, V. Capalbo, E. Carretti, D. Ciccalotti, F. Columbro, A. Cruciani, M. De Petris, F. Govoni, G. Isopi, L. Lamagna, E. Levati, P. Marongiu, A. Mascia, S. Masi, E. Molinari, M. Murgia, A. Navarrini, A. Novelli, A. Occhiuzzi, A. Orlati, A. Paiella, E. Pappalardo, G. Pettinari, F. Piacentini, T. Pisanu, S. Poppi, I. Porceddu, A. Ritacco, M. R. Schirru, G. Vargiu","doi":"10.1007/s10909-024-03263-2","DOIUrl":"10.1007/s10909-024-03263-2","url":null,"abstract":"<div>We describe the design and performance of the cryostat and the multi-stage sub-K single-shot sorption cooler for the MIllimeter Sardinia Radio Telescope Receiver based on Array of Lumped elements kids (MISTRAL) experiment. MISTRAL is a W-band (77 - 103 GHz) Ti/Al bi-layer Lumped Elements Kinetic Inductance Detectors (LEKIDs) camera working at the Gregorian focus of the 64 m aperture Sardinia Radio Telescope (SRT), located in Sardinia (Italy). The cryogenic system, based on a 1.5 W at 4.2 K Pulse Tube (PT) cryocooler, provides the 4 K base temperature for the sub-K refrigerator, and cools down the cold optics and the filters chain of the instrument. The sub-K sorption cooler consists of two intermediate stages, (^{4})He and (^{3})He sorption refrigerators that allow to reduce the heat load on the ultra-cold head, and a twin stage of (^{3})He sorption refrigerator providing the 0.2 K operation temperature for the 415-pixel array of LEKIDs. MISTRAL experiment was installed at SRT in May 2023, the technical commissioning started in June 2023. We will show the performance of the system in the laboratory.</div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"218 5-6","pages":"335 - 346"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-024-03263-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513291","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