Papers in Physics最新文献_第10页

Calculation of almost all energy levels of baryons 重子几乎所有能级的计算

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Papers in Physics Pub Date : 2011-08-08 DOI: 10.4279/PIP.030003

M. D. Souza

引用次数: 6

Plasmon-enhanced second harmonic generation in semiconductor quantum dots close to metal nanoparticles 接近金属纳米粒子的半导体量子点中等离子体增强二次谐波的产生

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Papers in Physics Pub Date : 2011-06-11 DOI: 10.4279/PIP.030002

Pablo M. Jais, C. Bilderling, A. Bragas

引用次数: 11

Master curves for the stress tensor invariants in stationary states of static granular beds. Implications for the thermodynamic phase space 静态颗粒床稳态应力张量不变量的主曲线。对热力学相空间的启示

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Papers in Physics Pub Date : 2011-05-24 DOI: 10.4279/PIP.030004

L. Pugnaloni, J. Damas, I. Zuriguel, D. Maza

{"title":"Master curves for the stress tensor invariants in stationary states of static granular beds. Implications for the thermodynamic phase space","authors":"L. Pugnaloni, J. Damas, I. Zuriguel, D. Maza","doi":"10.4279/PIP.030004","DOIUrl":"https://doi.org/10.4279/PIP.030004","url":null,"abstract":"We prepare static granular beds under gravity in different stationary states by tapping the system with pulsed excitations of controlled amplitude and duration. The macroscopic state---defined by the ensemble of static configurations explored by the system tap after tap---for a given tap intensity and duration is studied in terms of volume, , and force moment tensor, . In a previous paper [Pugnaloni et al., Phys. Rev. E 82, 050301(R) (2010)], we reported evidence supporting that such macroscopic states cannot be fully described by using only or , apart from the number of particles . In this work, we present an analysis of the fluctuations of these variables that indicates that and may be sufficient to define the macroscopic states. Moreover, we show that only one of the invariants of is necessary, since each component of falls onto a master curve when plotted as a function of . This implies that these granular assemblies have a common shape for the stress tensor, even though it does not correspond to the hydrostatic type. Although most results are obtained by molecular dynamics simulations, we present supporting experimental results. Received: 11 May 2011, Accepted: 15 July 2011; Edited by: J-C. Geminard; Reviewed by: B. Tighe, Instituut-Lorentz, Universiteit Leiden, Netherlands; DOI: http://dx.doi.org/10.4279/PIP.030004 Cite as: L. A. Pugnaloni, J. Damas, I. Zuriguel, D. Maza, Papers in Physics 3, 030004 (2011)","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2011-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71009206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Commentary on "Experimental determination of distance and orientation of metallic nanodimers by polarization dependent plasmon coupling" 对“偏振相关等离子体耦合测定金属纳米二聚体的距离和取向的实验”的评论

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Papers in Physics Pub Date : 2011-01-13 DOI: 10.4279/PIP.020011

Sukhdev Roy

引用次数: 0

Experimental determination of distance and orientation of metallic nanodimers by polarization dependent plasmon coupling 利用极化相关等离子体耦合测定金属纳米二聚体的距离和取向

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Papers in Physics Pub Date : 2011-01-11 DOI: 10.4279/pip.020010

H. Grecco, O. Mart'inez

{"title":"Experimental determination of distance and orientation of metallic nanodimers by polarization dependent plasmon coupling","authors":"H. Grecco, O. Mart'inez","doi":"10.4279/pip.020010","DOIUrl":"https://doi.org/10.4279/pip.020010","url":null,"abstract":"Live cell imaging using metallic nanoparticles as tags is an emerging technique to visualize long and highly dynamic processes due to the lack of photobleaching and high photon rate. However, the lack of excited states as compared to fluorescent dyes prevents the use of resonance energy transfer and recently developed super resolution methods to measure distances between objects closer that the resolution limit. In this work, we experimentally demonstrate a technique to determine subdiffraction distances based on the near field coupling of metallic nanoparticles. Due to the symmetry breaking in the scattering cross section, not only distances but also relative orientations can be measured. Gold nanoparticles were prepared on glass in such way that a small fraction of dimers was present. The sample was sequentially illuminated with two wavelengths to separate background from nanoparticle scattering based on their spectral properties. A novel total internal reflection illumination scheme in which the polarization can be rotated was used to further minimize background contributions. In this way, radii, distance and orientation were measured for each individual dimer and their statistical distributions were found to be in agreement with the expected ones. We envision that this technique will allow fast and long term tracking of relative distance and orientation in biological processes. Received: 22 April 2010, Accepted: 2 December 2010; Edited by: V. Lakshminarayanan; Reviewed by: S. Roy, Dayalbagh Educational Institute, Agra, India; DOI: 10.4279/PIP.020010","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2011-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71009517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Anisotropic finite-size scaling of an elastic string at the depinning threshold in a random-periodic medium 随机周期介质中弹性弦在脱羽阈值处的各向异性有限尺寸尺度

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Papers in Physics Pub Date : 2010-12-20 DOI: 10.4279/pip.020008

S. Bustingorry, A. Kolton

{"title":"Anisotropic finite-size scaling of an elastic string at the depinning threshold in a random-periodic medium","authors":"S. Bustingorry, A. Kolton","doi":"10.4279/pip.020008","DOIUrl":"https://doi.org/10.4279/pip.020008","url":null,"abstract":"We numerically study the geometry of a driven elastic string at its sample-dependent depinning threshold in random-periodic media. We find that the anisotropic finite-size scaling of the average square width and of its associated probability distribution are both controlled by the ratio , where is the random-manifold depinning roughness exponent, is the longitudinal size of the string and the transverse periodicity of the random medium. The rescaled average square width displays a non-trivial single minimum for a finite value of . We show that the initial decrease for small reflects the crossover at from the random-periodic to the random-manifold roughness. The increase for very large implies that the increasingly rare critical configurations, accompanying the crossover to Gumbel critical-force statistics, display anomalous roughness properties: a transverse-periodicity scaling in spite that , and subleading corrections to the standard random-manifold longitudinal-size scaling. Our results are relevant to understanding the dimensional crossover from interface to particle depinning. Received: 20 October 2010, Accepted: 1 December 2010; Edited by: A. Vindigni; Reviewed by: A. A. Fedorenko, CNRS-Lab. de Physique, ENS de Lyon, France; DOI: 10.4279/PIP.020008","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71009472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Invited review: Effect of temperature on a granular pile 特邀评论:温度对颗粒堆的影响

IF 0.9

Papers in Physics Pub Date : 2010-11-17 DOI: 10.4279/pip.020006

T. Divoux

{"title":"Invited review: Effect of temperature on a granular pile","authors":"T. Divoux","doi":"10.4279/pip.020006","DOIUrl":"https://doi.org/10.4279/pip.020006","url":null,"abstract":"As a fragile construction, a granular pile is very sensitive to minute external perturbations. In particular, it is now well established that a granular assembly is sensitive to variations of temperature. Such variations can produce localized rearrangements as well as global static avalanches inside a pile. In this review, we sum up the various observations that have been made concerning the effect of temperature on a granular assembly. In particular, we dwell on the way controlled variations of temperature have been employed to generate the compaction of a granular pile. After laying emphasis on the key features of this compaction process, we compare it to the classic vibration-induced compaction. Finally, we also review other textit{granular systems} in a large sense, from microscopic (jammed multilamellar vesicles) to macroscopic scales (stone heave phenomenon linked to freezing and thawing of soils) for which periodic variations of temperature could play a key role in the dynamics at stake. Received: 10 August 2010; Accepted: 28 October 2010; Edited by: I. Ippolito; Reviewed by: A. Coniglio, Universita di Napoli “Federico II”, Napoli, Italy ; DOI: 10.4279/PIP.020006 Editor's Note: Some figures in this paper are reprinted with permission from Wiley-VCH Verlag, the American Physcal Society, Elsevier and the Nature Publishing Group. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the abovementioned editorial organizations.","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2010-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71009366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Commentary on “Effect of temperature on a granular pile” 对“温度对颗粒桩的影响”一文的评论

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Papers in Physics Pub Date : 2010-11-17 DOI: 10.4279/PIP.020007

A. Coniglio, M. Ciamarra

引用次数: 0

Commentary on "Expansions for Eigenfunctions and Eigenvalues of large- Toeplitz Matrices" 关于“大Toeplitz矩阵特征函数和特征值的展开式”的评注

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Papers in Physics Pub Date : 2010-10-19 DOI: 10.4279/PIP.020004

T. Ehrhardt

引用次数: 2

Stability as a natural selection mechanism on interacting networks 稳定性作为相互作用网络的自然选择机制

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Papers in Physics Pub Date : 2010-07-17 DOI: 10.4279/PIP.020005

J. I. Perotti, O. Billoni, F. Tamarit, S. Cannas

{"title":"Stability as a natural selection mechanism on interacting networks","authors":"J. I. Perotti, O. Billoni, F. Tamarit, S. Cannas","doi":"10.4279/PIP.020005","DOIUrl":"https://doi.org/10.4279/PIP.020005","url":null,"abstract":"Biological networks of interacting agents exhibit similar topological properties for a wide range of scales, from cellular to ecological levels, suggesting the existence of a common evolutionary origin. A general evolutionary mechanism based on global stability has been proposed recently [J I Perotti, et al., Phys. Rev. Lett. 103, 108701 (2009)]. This mechanism was incorporated into a model of a growing network of interacting agents in which each new agent's membership in the network is determined by the agent's effect on the network's global stability. In this work, we analyze different quantities that characterize the topology of the emerging networks, such as global connectivity, clustering and average nearest neighbors degree, showing that they reproduce scaling behaviors frequently observed in several biological systems. The influence of the stability selection mechanism on the dynamics associated to the resulting network, as well as the interplay between some topological and functional features are also analyzed. Received: 17 July 2010; Accepted: 27 September 2010; Edited by: D. H. Zanette; Reviewed by: V. M. Eguiluz, Inst. Fisica Interdisciplinar y Sist. Complejos, Palma de Mallorca, Spain; DOI: 10.4279/PIP.020005","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2010-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71009308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1