Puhlmann, Mathias

[["dc.bibliographiccitation.artnumber","134101"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","91"],["dc.contributor.author","Schanz, H."],["dc.contributor.author","Puhlmann, M."],["dc.contributor.author","Geisel, Theo"],["dc.date.accessioned","2018-11-07T10:36:04Z"],["dc.date.available","2018-11-07T10:36:04Z"],["dc.date.issued","2003"],["dc.description.abstract","We consider universal shot noise in ballistic chaotic cavities from a semiclassical point of view and show that it is due to action correlations within certain groups of classical trajectories. Using quantum graphs as a model system, we sum these trajectories analytically and find agreement with random-matrix theory. Unlike all action correlations which have been considered before, the correlations relevant for shot noise involve four trajectories and do not depend on the presence of any symmetry."],["dc.identifier.doi","10.1103/PhysRevLett.91.134101"],["dc.identifier.isi","000185573700019"],["dc.identifier.pmid","14525306"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45238"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0031-9007"],["dc.title","Shot noise in chaotic cavities from action correlations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3251"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","European Journal of Neuroscience"],["dc.bibliographiccitation.lastpage","3266"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Kaschube, Matthias"],["dc.contributor.author","Wolf, Fred"],["dc.contributor.author","Puhlmann, Mathias"],["dc.contributor.author","Rathjen, Stefan"],["dc.contributor.author","Schmidt, Karl-Friedrich"],["dc.contributor.author","Geisel, Theo"],["dc.contributor.author","Löwel, Siegrid"],["dc.date.accessioned","2017-09-07T11:45:37Z"],["dc.date.available","2017-09-07T11:45:37Z"],["dc.date.issued","2003"],["dc.description.abstract","We present a comprehensive analysis of the intrinsic variability of the periodicity of ocular dominance columns in cat primary visual cortex (area 17) and its relationship to genetic background and visual experience. We characterized the intra-areal and interindividual variability of column spacing in a large set (n = 49) of ocular dominance patterns adapting a recently developed technique for the two-dimensional analysis of orientation column patterns. Patterns were obtained from three different cat colonies (termed F, M and D), the cats having either normal visual experience or experimentally induced strabismus. Two-dimensional maps of local column spacing were calculated for every pattern. In individual cortices, local column spacings varied by > 50% with the majority of column spacings ranging between 0.6 and 1.5 mm in different animals. In animals from colonies F and M (n = 29), the mean column spacing ranged between 1.03 and 1.27 mm and exhibited no significant differences, either between the two breeds or between strabismic and normal animals. The mean spacing was moderately clustered in the left and right brain hemisphere of individual animals but not in littermates. In animals from colony D (n = 2), average column spacing ranged between 0.73 and 0.95 mm, and was thus significantly different from the distribution of spacings in animals from breeds F and M, suggesting an influence of genetic factors on the layout of ocular dominance columns. Local column spacing exhibited a considerable systematic intra-areal variation, with largest spacings along the representation of the horizontal meridian and smallest spacings along the peripheral representation of the vertical meridian. The total variability of ocular dominance column spacing comprised 24% systematic intra-areal variation, 18% interindividual differences of mean column spacing and 58% nonsystematic intra-areal variability."],["dc.identifier.doi","10.1111/j.1460-9568.2003.02979.x"],["dc.identifier.gro","3151826"],["dc.identifier.pmid","14686899"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8656"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0953-816X"],["dc.title","The pattern of ocular dominance columns in cat primary visual cortex: intra- and interindividual variability of column spacing and its dependence on genetic background"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","313"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","EPL"],["dc.bibliographiccitation.lastpage","319"],["dc.bibliographiccitation.volume","69"],["dc.contributor.author","Puhlmann, M."],["dc.contributor.author","Schanz, H."],["dc.contributor.author","Kottos, Tsampikos"],["dc.contributor.author","Geisel, Theo"],["dc.date.accessioned","2018-11-07T08:27:41Z"],["dc.date.available","2018-11-07T08:27:41Z"],["dc.date.issued","2005"],["dc.description.abstract","We study the quantum probability to survive in an open chaotic system in the framework of the van Vleck-Gutzwiller propagator and present the first such calculation that accounts for quantum interference effects. Specifically, we calculate quantum deviations from the classical decay after the break time t for both broken and preserved time-reversal symmetry. The source of these corrections is identified in interfering pairs of correlated classical trajectories. In our approach the quantized chaotic system is modelled by a quantum graph."],["dc.identifier.doi","10.1209/epl/i2004-10347-6"],["dc.identifier.isi","000227070200001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16258"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0295-5075"],["dc.title","Quantum decay of an open chaotic system: A semiclassical approach"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]