Gallesco, Christophe, Müller, Sebastian, Popov, Serguei
Spider walks are systems of interacting particles. The particles move independently as long as their movement do not violate some given rules describing the relative position of the particles; moves...
Recurrence and transience of branching random walks are dynamically stable (2009)
Consider a sequence of i.i.d. random variables $X_n$ where each random variable is refreshed independently according to a Poisson clock. At any fixed time $t$ the law of the sequence is the same as...
Near action-degenerate periodic-orbit bunches: A skeleton of chaos (2009)
Altland, Alexander, Braun, Petr, Haake, Fritz, Heusler, Stefan, Knieper, Gerhard, Müller, Sebastian
Long periodic orbits of hyperbolic dynamics do not exist as independent individuals but rather come in closely packed bunches. Under weak resolution a bunch looks like a single orbit in configuration...
Periodic-orbit theory of universal level correlations in quantum chaos (2009)
Müller, Sebastian, Heusler, Stefan, Altland, Alexander, Braun, Petr, Haake, Fritz
Using Gutzwiller's semiclassical periodic-orbit theory we demonstrate universal behaviour of the two-point correlator of the density of levels for quantum systems whose classical limit is fully...
A possible architecture of the planetary system HR 8799 (2009)
Reidemeister, Martin, Krivov, Alexander V., Schmidt, Tobias O. B., Fiedler, Simone, Müller, Sebastian, Löhne, Torsten, ...
HR8799 is a nearby A-type star with a debris disk and three planetary candidates recently imaged directly. We undertake a coherent analysis of various portions of observational data on all known...
The n-level spectral correlations for chaotic systems (2009)
Nagao, Taro, Müller, Sebastian
We study the $n$-level spectral correlation functions of classically chaotic quantum systems without time-reversal symmetry. According to Bohigas, Giannoni and Schmit's universality conjecture, it is...
Kreuz, Peter C, Müller, Sebastian, Ossendorf, Christian, Kaps, Christian, Erggelet, Christoph
Abstract Introduction Second-generation autologous chondrocyte implantation with scaffolds stabilizing the grafts is a clinically effective procedure for cartilage repair. In this ongoing prospective...
Random Walks on Directed Covers of Graphs (2009)
Gilch, Lorenz A., Müller, Sebastian
Directed covers of finite graphs are also known as periodic trees or trees with finitely many cone types. We expand the existing theory of directed covers of finite graphs to those of infinite...
Gusy, Christoph, Müller, Sebastian
Das Policy Paper "Wie kann die Rolle des Europäischen Gerichtshofs für Menschenrechte gestärkt werden? Empfehlungen für Deutschland" fasst die wichtigsten Ergebnisse der dreijährigen...
Sostmann, Kai, Müller, Sebastian, Höffe, Julia, Gross, Manfred, Gaedicke, Gerhard
Der studentische Unterricht in der Kinderheilkunde an der Charité hat seit 1999 mehrere Umstrukturierungen durchlaufen. Mit der Einführung der neuen ärztlichen Approbationsordnung 2004 im...
DY 5.1 Mon 14:00–14:30 H2 Dynamics of Dunes — •Hans Herrmann (2008)
Klaus Richter, Sebastian Müller, Er Altl, Petr Braun
Invited Talks
Recurrence for branching Markov chains (2008)
Müller, Sebastian; Technische Universität Graz; Mullerse@tugraz.at
The question of recurrence and transience of branching Markov chains is more subtle than for ordinary Markov chains; they can be classified in transience, weak recurrence, and strong recurrence. We...
Survival of branching random walks in random environment (2008)
Gantert, Nina, Müller, Sebastian, Popov, Serguei, Vachkovskaia, Marina
We study survival of nearest-neighbour branching random walks in random environment (BRWRE) on $\mathbb{Z}$. A priori there are three different regimes of survival: global survival, local survival,...
A criterion for transience of multidimensional branching random walk in random environment (2008)
Müller, Sebastian; University Münster; Mueller@tugraz.at
We develop a criterion for transience for a general model of branching Markov chains. In the case of multi-dimensional branching random walk in random environment (BRWRE) this criterion becomes...
Krivov, Alexander V., Müller, Sebastian, Löhne, Torsten, Mutschke, Harald
Debris disks around main-sequence stars are believed to derive from planetesimal populations that have accreted at early epochs and survived possible planet formation processes. While debris disks...
Semiclassical spectral correlator in quasi one-dimensional systems (2008)
Braun, Petr, Müller, Sebastian, Haake, Fritz
We investigate the spectral statistics of chaotic quasi one dimensional systems such as long wires. To do so we represent the spectral correlation function $R(\epsilon)$ through derivatives of a...
Gusy, Christoph, Müller, Sebastian
JURISTRAS comparatively explores processes of human rights litigation in the European Court of Human Rights (ECtHR) and the effects of its judgments on national laws, judicial attitudes and policy...
ABSTRACT Distributed Constraint Optimization for Medical Appointment Scheduling (2007)
Markus Hannebauer, Sebastian Müller
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Recurrence for branching Markov chains (2007)
The question of recurrence and transience of branching Markov chains is more subtle than for ordinary Markov chains; they can be classified in transience, weak recurrence, and strong recurrence. We...
Resummation and the semiclassical theory of spectral statistics (2007)
Keating, Jonathan P., Müller, Sebastian
We address the question as to why, in the semiclassical limit, classically chaotic systems generically exhibit universal quantum spectral statistics coincident with those of Random Matrix Theory. To...
A criterion for transience of multidimensional branching random walk in random environment (2007)
We develop a criterion for transience for a general model of branching Markov chains. In the case of multi-dimensional branching random walk in random environment (BRWRE) this criterion becomes...
Porosity and permeability are both parameters which may have a considerable impact on the characteristics of a volcanic eruption. Various processes, from magmatic flow during ascent to the point of...
Porosity and permeability are both parameters which may have a considerable impact on the characteristics of a volcanic eruption. Various processes, from magmatic flow during ascent to the point of...
...
Semiclassical Approach to Chaotic Quantum Transport (2006)
Müller, Sebastian, Heusler, Stefan, Braun, Petr, Haake, Fritz
We describe a semiclassical method to calculate universal transport properties of chaotic cavities. While the energy-averaged conductance turns out governed by pairs of entrance-to-exit trajectories,...
Periodic-Orbit Theory of Level Correlations (2006)
Heusler, Stefan, Müller, Sebastian, Altland, Alexander, Braun, Petr, Haake, Fritz
We present a semiclassical explanation of the so-called Bohigas-Giannoni-Schmit conjecture which asserts universality of spectral fluctuations in chaotic dynamics. We work with a generating function...
Semiclassical Theory for Parametric Correlation of Energy Levels (2006)
Nagao, Taro, Braun, Petr, Müller, Sebastian, Saito, Keiji, Heusler, Stefan, Haake, Fritz
Parametric energy-level correlation describes the response of the energy-level statistics to an external parameter such as the magnetic field. Using semiclassical periodic-orbit theory for a chaotic...
Recurrence and Transience for Branching Random Walks in an iid Random Environment (2006)
We give three different criteria for transience of a Branching Markov Chain. These conditions enable us to give a classification of Branching Random Walks in Random Environment (BRWRE) on Cayley...
Periodic-Orbit Approach to Universality in Quantum Chaos (2005)
We show that in the semiclassical limit, classically chaotic systems have universal spectral statistics. Concentrating on short-time statistics, we identify the pairs of classical periodic orbits...
Semiclassical Prediction for Shot Noise in Chaotic Cavities (2005)
Braun, Petr, Heusler, Stefan, Müller, Sebastian, Haake, Fritz
We show that in clean chaotic cavities the power of shot noise takes a universal form. Our predictions go beyond previous results from random-matrix theory, in covering the experimentally relevant...
Semiclassical Theory of Chaotic Conductors (2005)
Heusler, Stefan, Müller, Sebastian, Braun, Petr, Haake, Fritz
We calculate the Landauer conductance through chaotic ballistic devices in the semiclassical limit, to all orders in the inverse number of scattering channels without and with a magnetic field....
Periodic-Orbit Theory of Universality in Quantum Chaos (2005)
Müller, Sebastian, Heusler, Stefan, Braun, Petr, Haake, Fritz, Altland, Alexander
We argue semiclassically, on the basis of Gutzwiller's periodic-orbit theory, that full classical chaos is paralleled by quantum energy spectra with universal spectral statistics, in agreement with...
Turek, Marko, Spehner, Dominique, Müller, Sebastian, Richter, Klaus
We present a semiclassical calculation of the generalized form factor which characterizes the fluctuations of matrix elements of the quantum operators in the eigenbasis of the Hamiltonian of a...
A Smart Algorithm for Column Chart Labeling (2005)
Abstract. This paper presents a smart algorithm for labeling column charts and their derivatives. To efficiently solve the problem, we separate it into two sub-problems. We first present a geometric...
Semiclassical Foundation of Universality in Quantum Chaos (2004)
Müller, Sebastian, Heusler, Stefan, Braun, Petr, Haake, Fritz, Altland, Alexander
We sketch the semiclassical core of a proof of the so-called Bohigas-Giannoni-Schmit conjecture: A dynamical system with full classical chaos has a quantum energy spectrum with universal fluctuations...
Universal spectral form factor for chaotic dynamics (2003)
Heusler, Stefan, Müller, Sebastian, Braun, Petr, Haake, Fritz
We consider the semiclassical limit of the spectral form factor $K(\tau)$ of fully chaotic dynamics. Starting from the Gutzwiller type double sum over classical periodic orbits we set out to recover...
Classical basis for quantum spectral fluctuations in hyperbolic systems (2003)
We reason in support of the universality of quantum spectral fluctuations in chaotic systems, starting from the pioneering work of Sieber and Richter who expressed the spectral form factor in terms...
Braun, Peter A., Heusler, Stefan, Müller, Sebastian, Haake, Fritz
Employing symbolic dynamics for geodesic motion on the tesselated pseudosphere, the so-called Hadamard-Gutzwiller model, we construct extremely long periodic orbits without compromising accuracy. We...
Distributed Constraint Optimization for Medical Appointment Scheduling (2001)
Markus Hannebauer, Sebastian Müller, Sebastian M Uller
Though multi-agent systems seem to be promising to solve scheduling problems in administration and health care management, most implemented recent systems lack a sound foundation for collaboration....
Glaser, Markus, Müller, Sebastian
This study analyzes the existence of the diversification discount in the German stock market. Recent examples show that the degree of diversification is an important managerial decision variable and...