bluuebunny/crossref_metadata_2025_split huggingface dataset:
A quantum otto heat engine driven by three quantum dots
Authors: Khlifi Y , Abaach S , EL Baz M , A El Allati 
Published: June 2024

Abstract
A quantum heat engine composed of three coupled quantum dots as a working substance is proposed. Since quantum dots naturally obey the Fermi Hubbard Hamiltonian, the strong coupling interaction regime allows the working substance to be evaluated under an effective Heisenberg Hamiltonian. Indeed, the influence of the strength coupling, between the three dots, on quantum machine efficiency and work in the presence of a homogeneous magnetic field is also examined. Furthermore, the influence of entanglement on the efficiency & work of the quantum dot Otto heat engine is well analyzed. As a tripartite working substance, we are interested in analyzing the local work and efficiency associated with each single and pair of quantum dots. The results show that the local efficiency associated with a pair of quantum dots achieves a maximum value, unlike the global efficiency. Indeed, the entanglement impact on Global/local work is studied.
Interaction of SPI pellets with plasma on JET and associated disruptions
Authors: Gerasimov S N , Baylor L R , Boboc A , Carvalho I S , Carvalho P , Coffey I H , Craven D , Flanagan J , Huber A , Huber V , Jachmich S , Jepu I , Joffrin E , Kos D , Krasheninnikov S I , Kruezi U , Lehnen M , Lomas P J , Manzanares A , Maslov M , Peacock A , Puglia P , Rimini F G , Sergienko G , Shiraki D , Silburn S , Smirnov R D , Stuart C , Sun H , Wilson J , Zakharov L E ,   JET Contributors
Published: June 2024

Abstract
The presented data refer to the Shattered Pellet Injector (SPI) experiments carried out at JET in 2019–2020. This paper is a full journal version of the data originally presented as posters at TMPDM_2020 and EPS_2021. This paper presents various aspects of the interaction of pellets with plasma and associated disruptions. The experiment was performed with I

p
= (1.1–3.1) MA plasmas and mainly with Ne + D2 pellet composition, but also with Ar pellets. The Current Quench (CQ) time, τ
80−20, is the key characteristic of mitigation effectiveness. A pellet with a high content of Ne or Ar can reduce the CQ duration below the upper required JET threshold. Plasmas with high (thermal + internal poloidal magnetic) pre-disruptive plasma energy require a high content of Ne pellets to obtain a short CQ duration. Pellets with a small amount of Ne (and accordingly large amount of D), instead of causing a mitigated CQ, create the conditions for a ‘cold’ Vertical Displacement Events (VDE). The SPI was applied to plasma with different status: mainly to normal (‘healthy’) plasma, i.e. not prone to disruption, post-disruptive and VDE plasma. This study shows that SPI effectiveness in terms of CQ duration and, accordingly, EM loads does not depend on the state of the plasma, whether it is ‘healthy’ or post-disruptive plasma. SPI has been shown to reduce the axisymmetric vertical vessel reaction forces by about (30–40) % compared to unmitigated disruptions. On JET, the VDE, whether ‘hot’ or ‘cold’, always creates the conditions for a toroidal asymmetry in the plasma, so the VDE on the JET is referred to as Asymmetric VDE (AVDE). The interrupting of VDE and prevention of AVDE with SPI has been demonstrated. Thus, the effectiveness of disruption mitigation using SPI has been confirmed.
Improving constraints on inflation with CMB delensing
Authors: Trendafilova Cynthia , Hotinli Selim C. , Meyers Joel 
Published: June 2024

Abstract
The delensing of cosmic microwave background (CMB) maps will be increasingly valuable for extracting as much information as possible from future CMB surveys. Delensing provides many general benefits, including sharpening of the acoustic peaks, more accurate recovery of the damping tail, and reduction of lensing-induced B-mode power. In this paper we present several applications of delensing focused on testing theories of early-universe inflation with observations of the CMB. We find that delensing the CMB results in improved parameter constraints for reconstructing the spectrum of primordial curvature fluctuations, probing oscillatory features in the primordial curvature spectrum, measuring the spatial curvature of the universe, and constraining several different models of isocurvature perturbations. In some cases we find that delensing can recover almost all of the constraining power contained in unlensed spectra, and it will be a particularly valuable analysis technique to achieve further improvements in constraints for model parameters whose measurements are not expected to improve significantly when utilizing only lensed CMB maps from next-generation CMB surveys. We also quantify the prospects of testing the single-field inflation tensor consistency condition using delensed CMB data; we find it to be out of reach of current and proposed experimental technology and advocate for alternative detection methods.
The combined effects of quantum and strong coupling on the nonlinear collective excitation in quantum dusty plasmas
Authors: Li Chengkai , Kang Youyou , Wang Yunliang 
Published: June 2024

Abstract
The quantum hydrodynamic model for electrons and ions and the generalized hydrodynamic model for the strongly coupled dust particles are proposed in the strongly coupled quantum dusty plasma, where the combined quantum effects of quantum diffraction, quantum statistic pressure, as well as electron exchange and correlation effects are all considered in the quantum hydrodynamic model. The shear and bulk viscosity effects are included in the viscoelastic relaxation, which leads to the decay of the dust-ion-acoustic waves. The approximate time-dependent solitary solution is obtained by the momentum conservation law in the presence of viscosity.
Single crystal growth and characterization of 166-type magnetic kagome metals
Authors: Wu 吴 Huangyu 黄宇 , Liu 刘 Jinjin 锦锦 , Li 李 Yongkai 永恺 , Zhu 朱 Peng 鹏 , Yang 杨 Liu 柳 , Chen 陈 Fuhong 富红 , Hu 胡 Deng 灯 , Wang 王 Zhiwei 秩伟 
Published: June 2024

Abstract
Kagome magnets were predicted to be a good platform to investigate correlated topology band structure, Chern quantum phase, and geometrical frustration due to their unique lattice geometry. Here we reported single crystal growth of 166-type kagome magnetic materials, including HfMn6Sn6, ZrMn6Sn6, GdMn6Sn6 and GdV6Sn6, by using the flux method with Sn as the flux. Among them, HfMn6Sn6 and ZrMn6Sn6 single crystals were grown for the first time. X-ray diffraction measurements reveal that all four samples crystallize in HfFe6Ge6-type hexagonal structure with space group P6/mmm. All samples show metallic behavior from temperature dependence of resistivity measurements, and the dominant carrier is hole, except for GdV6Sn6 which is electron dominated. All samples have magnetic order with different transition temperatures, HfMn6Sn6, ZrMn6Sn6 and GdV6Sn6 are antiferromagnetic with T
N of 541 K, 466 K and 4 K respectively, while GdMn6Sn6 is ferrimagnetic with the critical temperature of about 470 K. This study will enrich the research platform of magnetic kagome materials and help explore the novel quantum phenomena in these interesting materials. The dataset of specific crystal structure parameters for HfMn6Sn6 are available in Science Data Bank, with the link https://doi.org/10.57760/sciencedb.j00113.00120.
Simultaneous control of ferromagnetism and ferroelasticity by oxygen octahedral backbone stretching
Authors: Liang 梁 Genhao 根豪 , Cao 曹 Hui 慧 , Cheng 成 Long 龙 , Zha 查 Junkun 君坤 , Bao 保 Mingrui 明睿 , Ye 叶 Fei 飞 , Zhou 周 Hua 华 , Zhao 赵 Aidi 爱迪 , Zhai 翟 Xiaofang 晓芳 
Published: June 2024

Abstract
Coexistence of ferromagnetism and ferroelasticity in a single material is an intriguing phenomenon, but has been rarely found. Here we studied both the ferromagnetism and ferroelasticity in a group of LaCoO3 films with systematically tuned atomic structures. We found that all films exhibit ferroelastic domains with four-fold symmetry and the larger domain size (higher elasticity) is always accompanied by stronger ferromagnetism. We performed synchrotron x-ray diffraction studies to investigate the backbone structure of the CoO6 octahedra, and found that both the ferromagnetism and the elasticity are simultaneously enhanced when the in-plane Co–O–Co bond angles are straightened. Therefore the study demonstrates the inextricable correlation between the ferromagnetism and ferroelasticity mediated through the octahedral backbone structure, which may open up new possibilities to develop multifunctional materials.
Minimum connected dominating set and backbone of a random graph
Authors: Habibulla Yusupjan , Zhou Hai-Jun 
Published: June 2024

Abstract
We study the minimum dominating set problem as a representative combinatorial optimization challenge with a global topological constraint. The requirement that the backbone induced by the vertices of a dominating set should be a connected subgraph makes the problem rather nontrivial to investigate by statistical physics methods. Here, we convert this global connectivity constraint into a set of local vertex constraints and build a spin glass model with only five coarse-grained vertex states. We derive a set of coarse-grained belief-propagation equations and obtain theoretical predictions of the relative sizes of the minimum dominating sets for regular random and Erdös–Rényi random graph ensembles. We also implement an efficient message-passing algorithm to construct close-to-minimum connected dominating sets and backbone subgraphs for single random graph instances. Our theoretical strategy may also be applicable to some other global topological constraints.
Inversion isomerism induced by the Pseudo Jahn-Teller Effect in X2CE molecules (X = H, F; E = O, S, Se) in their reduced and excited states
Authors: Gorinchoy Natalia , Balan Iolanta , Polinger Victor , Bersuker Isaac B. 
Published: June 2024

Abstract
The pseudo-Jahn-Teller effect (PJTE) is employed to reveal the origin of molecular geometry changes induced by reduction and excitation, using a series of X2CE molecules (X = H, F, Cl; E = C, S, Se) as examples. Their nuclear configuration is planar with C
2v symmetry in the ground electronic state. However, when reduced, they acquire a nonplanar pyramidal structure with an elongated C-E bond in their ground and lowest excited electronic states 1A2 and 3A2. It is shown that these distortions are due to the PJT mixing of the reference electronic states with appropriate excited states via the b
1 vibrational mode. The PJTE is shown to reasonably parametrize the adiabatic potential energy curve ε(Qb

1) along the instability coordinate Qb

1.
Singular vibronic interaction in liquids: manifestation in the optical spectrum of impurity atoms in superfluid helium
Authors: Hizhnyakov V. , Boltrushko V. , Benedek G. , Moroshkin P. 
Published: June 2024

Abstract
The zero phonon line (ZPL) and its phonon-roton wing have been studied both experimentally and theoretically in the optical spectrum of the inner shell transition in the Dy atom in superfluid helium. It is shown that the linear vibronic interaction of impurity atom with long-wave acoustic phonons in the liquid phase is singularly enhanced. As a result, the ZPL of both the superfluid and normal components of liquid helium has a finite width. The temperature dependence of the spectrum is a consequence of the redistribution of the superfluid and normal components of the liquid helium and the temperature dependence of the spectrum of its normal component. Our calculations of the ZPL and its phonon-rotor wing are consistent with the experiment.
Beyond Born-Oppenheimer Treatment for Multi-State Photoelectron Spectra, Phase Transitions of Solids and Scattering Processes
Authors: Mukherjee Soumya , Naskar Koushik , Hazra Saikat , Kumar Sah Mantu , Adhikari Satrajit 
Published: June 2024

Abstract
The “completeness” and “accuracy” of first principle based Beyond Born-Oppenheimer (BBO) theory is reviewed with its theoretical developments and wide applications on various realistic spectroscopic systems, scattering processes and pervoskite molecules exhibiting phase transition phenomena. Over the last two decades, our group has formulated as well as implemented the BBO treatment to construct diabatic Hamiltonian for several spectroscopically interesting molecules (NO2 radical, Na3 and K3 clusters, NO3,

C
6

H
6
+

,
1,3,5
-

C
6

H
3

F
3
+

and C4N2H4), octahedral units of perovskites (

M
n

O
6

9
−

and

T
i

O
6

8
−

) involving solid state phenomenon as well as triatomic reactive scattering processes (

H
3
+

,

H
e

H
2
+

and F+H2) to depict the effects of electron-nuclear couplings. Such diabatic Hamiltonians have been further used to perform quantum dynamical calculations to obtain observables (photoelectron spectra for spectroscopic/solid state systems and cross-sections/rate constants for scattering processes), which show excellent agreement with the recent experimental findings. In summary, this article provides the current perspective of BBO approach as well as Jahn-Teller (JT) theory with various applications on molecular systems/chemical processes.
Enhancement of long-wave vibronic interaction and quantum diffusion in liquids
Authors: Hizhnyakov V. 
Published: June 2024

Abstract
The zero-phonon type hoping motion of atoms in the solid and liquid phases, causing quantum diffusion, is considered. It was found that due to the previously discovered significant enhancement of vibronic interaction with long-wave acoustic phonons, this motion in liquids can be significantly amplified compared to the solid phase of the same substance at a close temperature. Quantum diffusion may be particularly important in superfluid He.
20-year permafrost evolution documented through petrophysical joint inversion, thermal and soil moisture data
Authors: Morard S , Hilbich C , Mollaret C , Pellet C , Hauck C 
Published: June 2024

Abstract
This study investigates the ground characteristics of the high altitude (3410 m a.s.l.) permafrost site Stockhorn in the Swiss Alps using a combination of surface and subsurface temperature, soil moisture, electrical resistivity and P-wave velocity time series data including a novel approach to explicitly quantify changes in ground ice content. This study was motivated by the clear signal of permafrost degradation visible in the full dataset at this long-term monitoring site within the PERMOS (Permafrost Monitoring Switzerland) network. Firstly, we assess the spatio-temporal evolution of the ground ice and water content by a combined analysis of all available in situ thermal (borehole and ground surface temperature), hydrological (soil moisture) and geophysical (geoelectric and seismic refraction) data over two decades (2002–2022) regarding the driving factors for the spatially different warming. Secondly, we explicitly quantify the volumetric water and ice content and their changes in the subsurface from 2015 to 2022 using a time-consistent petrophysical joint inversion scheme within the open-source library pyGIMLi. The petrophysical joint inversion scheme has been improved by constraining the rock content to be constant in time for six subsequent inversions to obtain consistent changes in ice and water content over the monitoring period based on jointly inverted resistivity and traveltime data. All different data show a warming trend of the permafrost. The ice content modeled from the petrophysical joint inversion has decreased by about 15 vol.% between 2015 and 2022. Changes in ice content are first observed in the lower, south-facing part of the profile. As a result, resistivity and P-wave velocity have been decreasing significantly. Permafrost temperatures measured in the boreholes have increased between 0.5 °C and 1 °C in 20 years. Our study shows the high value of joint and quantitative analysis of datasets comprising complementary subsurface variables for long-term permafrost monitoring.
Unveiling spatial variations of high forest live biomass carbon stocks of Gabon using advanced remote sensing techniques
Authors: Takougoum Sagang Le Bienfaiteur , Favrichon Samuel , Dalagnol Ricardo , Ordway Elsa M , Medjibe Vincent , Manfoumbi Francis , Obame Conan , Wagner Fabien , George-Chacon Stephanie , White Lee , Saatchi Sassan 
Published: June 2024

Abstract
Gabon is one of 11 high-forest, low-deforestation (HFLD) countries in the world. It has the highest proportion of preserved forests in the Congo Basin and is the first country to create large forest carbon offset credits in the market. However, about 60% of forests in Gabon is allocated to logging concessions, causing concerns for forest degradation and the sustainability of carbon credits. Here, we use a combination of air- and space-borne remote sensing data and the-state-of-the-art gradient boosted regression trees to estimate forest structure and aboveground biomass carbon density (ACD) of trees at 100 m resolution for the year circa 2020. Mapping spatial variations of ACD across floristically diverse landscapes, we estimate average density and total living carbon storage of trees at the national and sub-national levels. The estimated ACD of trees in forestlands within the country was 142.12 ± 7.3 Mg C ha−1 with the highest values found in central Gabon (150.08 ± 5.8 Mg C ha−1) and on highlands (161.18 ± 6.7 Mg C ha−1). On average, in every region, ACD of forests found within logging concessions (149.89 ± 6.1 Mg C ha−1) was higher than unmanaged forests of unprotected areas (122.81 ± 4.4 Mg C ha−1), indicating the combined effects of logging in carbon-rich forests and increased productivity due to management. The country’s total estimated biomass carbon for trees (above and belowground) stored within the forests was 4.14 ± 0.3 Pg C with 68% found within logging concessions and 14% within protected areas. The map provides high precision and comprehensive assessment of carbon stocks of trees in Gabon’s forests, significantly improving the country’s prospects to implement climate mitigation policies and to participate in carbon markets.
Measuring Wellbeing in Heritage
Authors: Sayer Faye 
Published: June 2024

Abstract
This chapter presents a synopsis of the key evaluation strategies applied to measure the impact of heritage on subjective wellbeing. It outlines the diversity of methodological approaches to ‘wellbeing’ evaluations undertaken by heritage professionals and academics regarding museums, archaeology, and heritage’s impact on individual social values related to wellbeing. This research has included quantitative and qualitative research from a variety of contexts, albeit mostly in the United Kingdom. The key to this section is outlining different research strategies undertaken by different types of heritage assets, specifically museums, archaeological excavations, and heritage sites.
Heritage Places and Wellbeing
Authors: Sayer Faye 
Published: June 2024

Abstract
The chapter examined the studies use of a mixed method approach, which combined qualitative and quantitative methodologies to provide robust, rigorous, and significant evidence of the role heritage places had in enhancing individual visitors’ subjective wellbeing. Visitors to heritage sites were surveyed at the beginning and end of their visits, through combined closed question quantitative data collection and open question qualitative information from the comment space. Quantitative elements included Positive and Negative Affect Schedule (PANAS) and Modified Wellbeing Scale (MWS). This evaluative approach was applied to different contexts and sites in the United Kingdom, United States, and India. The subjective wellbeing measurements used in the study enabled change in visitor wellbeing to be analysed at an individual site analysis and comparatively across heritage place type, location, and based on demographics. The methods applied were able to identify significant changes to individual hedonic and eudaimonic wellbeing indicators and competencies because of physical engagement in heritage places.
A Danger Which We Do Not Know
Authors: Rondel David 
Published: June 2024

Abstract
A Danger Which We Do Not Know: A Philosophical Journey into Anxiety comprises six vignette-like chapters that, taken as an ensemble, tell a story about how philosophy and anxiety are joined at the hip, and together provide something like a philosophical guide to anxiety. The book explores some of the many connections between anxiety and philosophy. It considers how anxiety itself is one of the great, perennial philosophical themes; how anxious minds seem uniquely drawn to philosophical questions and how philosophers tend to be an unusually anxious bunch; how anxiety is one of the major instigators of philosophical reflection; and how philosophical reflection in turn can sometimes serve as a powerful form of anti-anxiety self-help.
When Something Bitter Rises Up
Authors: Rondel David 
Published: June 2024

Abstract
This chapter considers William James’s diagnosis of our human condition—a fascinating blend of existentialist anguish and pragmatist hope. I also sketch some of the strategies by which he thought we could become better and healthier than we presently are, more vital and energetic, more hopeful and less susceptible to psychic suffering. Despite the pain and sickness which is a constitutive feature of our nature as human beings, James reminds us that we are not merely passive recipients of suffering, lacking any say in the matter. He reminds us that we are agents with the capacity to take action, to heroically push back. In short, James saw that suffering is a deep and unavoidable fact of human existence, as the first Noble Truth of the Buddha teaches. But he also insisted that hope for improvement springs eternal.
Addressing current limitations of household transmission studies by collecting contact data
Authors: Layan Maylis , Hens Niel , de Hoog Marieke L A , Bruijning-Verhagen Patricia C J L , Cowling Benjamin J , Cauchemez Simon 
Published: June 2024

Abstract
Modeling studies of household transmission data have helped characterize the role of children in influenza and coronavirus disease 2019 (COVID-19) epidemics. However, estimates from these studies may be biased since they do not account for the heterogeneous nature of household contacts. Here, we quantified the impact of contact heterogeneity between household members on the estimation of child relative susceptibility and infectivity. We simulated epidemics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-like and influenza virus-like infections in a synthetic population of 1000 households, assuming heterogeneous contact levels. Relative contact frequencies were derived from a household contact study according to which contacts are more frequent in the father–mother pair, followed by the child–mother, child–child, and finally child–father pairs. Child susceptibility and infectivity were then estimated while accounting for heterogeneous contacts or not. When ignoring contact heterogeneity, child relative susceptibility was underestimated by approximately 20% in the two disease scenarios. Child relative infectivity was underestimated by 20% when children and adults had different infectivity levels. These results are sensitive to our assumptions of European-style household contact patterns; but they highlight that household studies collecting both disease and contact data are needed to assess the role of complex household contact behavior on disease transmission and improve estimation of key biological parameters.