Zippelius, Annette

[["dc.bibliographiccitation.firstpage","14001"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","EPL"],["dc.bibliographiccitation.volume","120"],["dc.contributor.author","Mokhtari, Zahra"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2020-12-10T18:41:38Z"],["dc.date.available","2020-12-10T18:41:38Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1209/0295-5075/120/14001"],["dc.identifier.eissn","1286-4854"],["dc.identifier.issn","0295-5075"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77635"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Collective rotations of active particles interacting with obstacles"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","154907"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","The Journal of Chemical Physics"],["dc.bibliographiccitation.volume","124"],["dc.contributor.author","Otto, Matthias"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2021-06-01T10:51:02Z"],["dc.date.available","2021-06-01T10:51:02Z"],["dc.date.issued","2006"],["dc.identifier.doi","10.1063/1.2186325"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/86866"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1089-7690"],["dc.relation.issn","0021-9606"],["dc.title","Microscopic dynamics of thin hard rods"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","098001"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Fiege, Andrea"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2018-11-07T08:31:44Z"],["dc.date.available","2018-11-07T08:31:44Z"],["dc.date.issued","2009"],["dc.description.abstract","We study the velocity autocorrelation function of a driven granular fluid in the stationary state in three dimensions. As the critical volume fraction of the glass transition in the corresponding elastic system is approached, we observe pronounced cage effects in the velocity autocorrelation function as well as a strong decrease of the diffusion constant, depending on the inelasticity. At moderate densities the velocity autocorrelation function is shown to decay algebraically in time, like t(-3/2), if momentum is conserved locally, and like t(-1), if momentum is not conserved by the driving. A simple scaling argument supports the observed long-time tails."],["dc.identifier.doi","10.1103/PhysRevLett.102.098001"],["dc.identifier.isi","000263911900068"],["dc.identifier.pmid","19392566"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17187"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","0031-9007"],["dc.title","Long-Time Tails and Cage Effect in Driven Granular Fluids"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","450"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","Physica. A, Statistical Mechanics and its Applications"],["dc.bibliographiccitation.lastpage","474"],["dc.bibliographiccitation.volume","282"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2018-11-07T10:39:32Z"],["dc.date.available","2018-11-07T10:39:32Z"],["dc.date.issued","2000"],["dc.description.abstract","Recently, we have modelled inelastic collisions of one-dimensional rods [1,2] by the absorption of translational energy E-tr through internal degrees of freedom, in particular elastic vibrations. We arrived at a stochastic description of collision processes, characterised by a stochastic coefficient of restitution a. In this paper, we construct an analytic approximation for the transition probability E-tr --> E-tr' =(1 - epsilon(2))E-tr. This allows us to perform much longer simulations of large, strongly inelastic granular systems and study relaxation to the true equilibrium state. If the internal vibrations are undamped, equilibrium is characterised by propagating sound waves. In the case of damping, the system develops towards a final state which consists of one big cluster, containing all particles at rest. (C) 2000 Elsevier Science B.V. All rights reserved."],["dc.identifier.doi","10.1016/S0378-4371(00)00106-0"],["dc.identifier.isi","000087955600008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46071"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0378-4371"],["dc.title","Dynamics of a one-dimensional granular gas with a stochastic coefficient of restitution"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","14"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.lastpage","4"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Ulrich, Stephan"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Roeller, Klaus"],["dc.contributor.author","Fingerle, Axel"],["dc.contributor.author","Herminghaus, Stephan"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2021-06-01T10:47:05Z"],["dc.date.available","2021-06-01T10:47:05Z"],["dc.date.issued","2009"],["dc.description.abstract","Wet granular materials are characterized by a defined bond energy in their particle interaction such that breaking a bond implies an irreversible loss of a fixed amount of energy. Associated with the bond energy is a nonequilibrium transition, setting in as the granular temperature falls below the bond energy. The subsequent aggregation of particles into clusters is shown to be a self-similar growth process with a cluster size distribution that obeys scaling. In the early phase of aggregation the clusters are fractals with Df=2, for later times we observe gelation. We use simple scaling arguments to derive the temperature decay in the early and late stages of cooling and verify our results with event-driven simulations."],["dc.identifier.doi","10.1103/PhysRevLett.102.148002"],["dc.identifier.gro","3146215"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85479"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.notes.status","final"],["dc.relation.eissn","1079-7114"],["dc.relation.issn","0031-9007"],["dc.title","Cooling and Aggregation in Wet Granulates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","856"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Biophysical Journal"],["dc.bibliographiccitation.lastpage","868"],["dc.bibliographiccitation.volume","109"],["dc.contributor.author","Winkler, Franziska"],["dc.contributor.author","Gummalla, Maheshwar"],["dc.contributor.author","Kuenneke, Lutz"],["dc.contributor.author","Lv, Zhiyi"],["dc.contributor.author","Zippelius, Annette"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Grosshans, Joerg"],["dc.date.accessioned","2018-11-07T09:52:29Z"],["dc.date.available","2018-11-07T09:52:29Z"],["dc.date.issued","2015"],["dc.description.abstract","The actin and microtubule networks form the dynamic cytoskeleton. Network dynamics is driven by molecular motors applying force onto the networks and the interactions between the networks. Here we assay the dynamics of centrosomes in the scale of seconds as a proxy for the movement of microtubule asters. With this assay we want to detect the role of specific motors and of network interaction. During interphase of syncytial embryos of Drosophila, cortical actin and the microtubule network depend on each other. Centrosomes induce cortical actin to form caps, whereas F-actin anchors microtubules to the cortex. In addition, lateral interactions between microtubule asters are assumed to be important for regular spatial organization of the syncytial embryo. The functional interaction between the microtubule asters and cortical actin has been largely analyzed in a static manner, so far. We recorded the movement of centrosomes at 1 Hz and analyzed their fluctuations for two processes-pair separation and individual movement. We found that F-actin is required for directional movements during initial centrosome pair separation, because separation proceeds in a diffusive manner in latrunculin-injected embryos. For assaying individual movement, we established a fluctuation parameter as the deviation from temporally and spatially slowly varying drift movements. By analysis of mutant and drug-injected embryos, we found that the fluctuations were suppressed by both cortical actin and microtubules. Surprisingly, the microtubule motor Kinesin-1 also suppressed fluctuations to a similar degree as F-actin. Kinesin-1 may mediate linkage of the microtubule (l)-ends to the actin cortex. Consistent with this model is our finding that Kinesin-1-GFP accumulates at the cortical actin caps."],["dc.identifier.doi","10.1016/j.bpj.2015.07.044"],["dc.identifier.isi","000360960500004"],["dc.identifier.pmid","26331244"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36133"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cell Press"],["dc.relation.issn","1542-0086"],["dc.relation.issn","0006-3495"],["dc.title","Fluctuation Analysis of Centrosomes Reveals a Cortical Function of Kinesin-1"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","011301"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Physical Review. E"],["dc.bibliographiccitation.volume","83"],["dc.contributor.author","Vollmayr-Lee, Katharina"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2018-11-07T09:00:08Z"],["dc.date.available","2018-11-07T09:00:08Z"],["dc.date.issued","2011"],["dc.description.abstract","We study a homogeneously driven granular fluid of hard spheres at intermediate volume fractions and focus on time-delayed correlation functions in the stationary state. Inelastic collisions are modeled by incomplete normal restitution, allowing for efficient simulations with an event-driven algorithm. The incoherent scattering function F-incoh(q,t) is seen to follow time-density superposition with a relaxation time that increases significantly as the volume fraction increases. The statistics of particle displacements is approximately Gaussian. For the coherent scattering function S(q,omega), we compare our results to the predictions of generalized fluctuating hydrodynamics, which takes into account that temperature fluctuations decay either diffusively or with a finite relaxation rate, depending on wave number and inelasticity. For sufficiently small wave number q we observe sound waves in the coherent scattering function S(q,omega) and the longitudinal current correlation function Cl(q,omega). We determine the speed of sound and the transport coefficients and compare them to the results of kinetic theory."],["dc.description.sponsorship","Institute of Theoretical Physics, University of Gottingen"],["dc.identifier.doi","10.1103/PhysRevE.83.011301"],["dc.identifier.isi","000286753700004"],["dc.identifier.pmid","21405687"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/24078"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1539-3755"],["dc.title","Hydrodynamic correlation functions of a driven granular fluid in steady state"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","031306"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Physical Review. E"],["dc.bibliographiccitation.volume","80"],["dc.contributor.author","Ulrich, Stephan"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.contributor.author","Roeller, Klaus"],["dc.contributor.author","Fingerle, Axel"],["dc.contributor.author","Herminghaus, Stephan"],["dc.date.accessioned","2018-11-07T11:25:24Z"],["dc.date.available","2018-11-07T11:25:24Z"],["dc.date.issued","2009"],["dc.description.abstract","We investigate a gas of wet granular particles covered by a thin liquid film. The dynamic evolution is governed by two-particle interactions, which are mainly due to interfacial forces in contrast to dry granular gases. When two wet grains collide, a capillary bridge is formed and stays intact up to a certain distance of withdrawal when the bridge ruptures, dissipating a fixed amount of energy. A freely cooling system is shown to undergo a nonequilibrium dynamic phase transition from a state with mainly single particles and fast cooling to a state with growing aggregates such that bridge rupture becomes a rare event and cooling is slow. In the early stage of cluster growth, aggregation is a self-similar process with a fractal dimension of the aggregates approximately equal to D(f) approximate to 2. At later times, a percolating cluster is observed which ultimately absorbs all the particles. The final cluster is compact on large length scales, but fractal with D(f) approximate to 2 on small length scales."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [SFB 602/B6]"],["dc.identifier.doi","10.1103/PhysRevE.80.031306"],["dc.identifier.isi","000270383400069"],["dc.identifier.pmid","19905109"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56613"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1539-3755"],["dc.title","Dilute wet granular particles: Nonequilibrium dynamics and structure formation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","021404"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Physical Review. E"],["dc.bibliographiccitation.volume","64"],["dc.contributor.author","Broderix, K."],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Hartmann, Alexander K."],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2018-11-07T08:50:23Z"],["dc.date.available","2018-11-07T08:50:23Z"],["dc.date.issued","2001"],["dc.description.abstract","The time-dependent stress relaxation for a Rouse model of a cross-linked polymer melt is completely determined by the spectrum of eigenvalues of the connectivity matrix. The latter has been computed analytically for a mean-field distribution of cross-links. It shows a Lifshitz tail for small eigenvalues and all concentrations below the percolation threshold, giving rise to a stretched exponential decay of the stress relaxation function in the sol phase. At the critical point the density of states is finite for small eigenvalues, resulting in a logarithmic divergence of the viscosity and an algebraic decay of the stress relaxation function. Numerical diagonalization of the connectivity matrix supports the analytical findings and has furthermore been applied to cluster statistics corresponding to random bond percolation in two and three dimensions."],["dc.identifier.doi","10.1103/PhysRevE.64.021404"],["dc.identifier.isi","000170492800034"],["dc.identifier.pmid","11497579"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21685"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","American Physical Soc"],["dc.relation.issn","1063-651X"],["dc.title","Stress relaxation of near-critical gels"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","759"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Statistical Physics"],["dc.bibliographiccitation.lastpage","773"],["dc.bibliographiccitation.volume","144"],["dc.contributor.author","Aspelmeier, Timo"],["dc.contributor.author","Zippelius, Annette"],["dc.date.accessioned","2018-11-07T08:53:32Z"],["dc.date.available","2018-11-07T08:53:32Z"],["dc.date.issued","2011"],["dc.description.abstract","We analyse the density of states of the random graph Laplacian in the percolating regime. A symmetry argument and knowledge of the density of states in the nonpercolating regime allows us to isolate the density of states of the percolating cluster (DSPC) alone, thereby eliminating trivially localised states due to finite subgraphs. We derive a nonlinear integral equation for the integrated DSPC and solve it with a population dynamics algorithm. We discuss the possible existence of a mobility edge and give strong evidence for the existence of discrete eigenvalues in the whole range of the spectrum."],["dc.identifier.doi","10.1007/s10955-011-0271-2"],["dc.identifier.isi","000294228400003"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7167"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22431"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0022-4715"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","Goescholar"],["dc.rights.uri","https://goedoc.uni-goettingen.de/licenses"],["dc.title","The Integrated Density of States of the Random Graph Laplacian"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]