Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"non-equilibrium dynamics"”.
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Non-Equilibrium Dynamics of Second Order Traffic Models
… is unstable, and small perturbations grow into nonlinear traveling waves, called jamitons. The case where the SCC is satisfied has been studied extensively. However, what is essentially unstudied is the question: which jamiton solutions are dynamically stable? To understand which stop-and-go …
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Non-equilibrium dynamics of adsorbed polymers and filaments
… work, we discuss two subjects related to the nonequilibrium dynamics of polymers or biological filaments adsorbed to two-dimensional substrates. The first part is dedicated to thermally activated dynamics of polymers on structured substrates in the presence or absence of a driving force. The …
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Non-equilibrium Dynamics of Nanoscale Soft Matter Deformation
… This work considers to areas: (1) lipid bilayer dynamics in the presence of substrate defects and (2) the inverse temperature transition of elastic proteins. Molecular dynamics simulations as well as umbrella sampling were employed. The behavior of the bilayers discussed in the work provides …
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Controlling non-equilibrium dynamics in lattice gas models
… a new interesting research avenue has emerged in non-equilibrium statistical physics, namely studies of collective responses in spatially inhomogeneous systems. Whereas substantial progress has been made in understanding the origins and the often universal nature of cooperative behavior in systems …
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Non-equilibrium dynamics of ultracold atoms in optical lattices
… experiments focused on investigating out-of-equilibrium phenomena in the Bose-Hubbard Model and exploring novel cooling techniques for ultracold gases in optical lattices. In the first experiment, we study quenches across the Mott-insulator-to-superfluid quantum phase transition in the 3D …
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Strongly interacting Fermi gases : non-equilibrium dynamics and dimensional crossover
… gases of fermionic atoms, with a focus on non-equilibrium physics and dimensionality. One of the fundamental dissipative processes in two-component gases is the transport of spin due to relative motion between the two spin components. We generate spin transport in strongly-interacting Fermi …
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Quantum Algorithms and Non-Equilibrium Dynamics in Many-Body Systems
… systems in the context of quantum algorithms and non-equilibrium dynamics. In the first part, we construct quantum algorithms that sample from classical Gibbs distributions. More specifically, a quantum state can encode the entire probability distribution, such that a measurement in the …
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Many-body physics and non-equilibrium dynamics in ultracold atomic systems
… to elucidate aspects of many-body physics and non-equilibrium dynamics. In the first two studies I model the dynamics of nonlinear solitonic excitations in ultracold fermionic superfluids: the first simulates recent experiments and supports the hypothesis that the solitons generated in those …
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Non-equilibrium dynamics of dipole-coupled internal states in cold gases
In this thesis, we consider the forms of non-equilibrium phenomena that can arise in atoms or polar molecules trapped in a deep optical lattice and coupled by dipolar internal degrees of freedom. We specifically focus on only two internal states, which results in the systems studied behaving as …
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Phases and non-equilibrium dynamics of ultracold bosons in an optical quasicrystal
… to Anderson insulator or Bose glass states (in non-interacting or interacting cases respectively) reminiscent of that in disordered systems, whilst lacking the rare regions that typically exist in such systems. Here we will cover experiments into this system’s behaviour in both equilibrium and …
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Effective kinetic description of non-equilibrium dynamics in small and large collision systems
… with few produced particles may require a non-equilibrium description of the dynamics. In this work we describe equilibrium and non-equilibrium effects in hadronic collisions ranging from small to large systems within model descriptions based on kinetic theory and compare to hydrodynamics. …
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Topological phases, non-equilibrium dynamics and parallels of black hole phenomena in condensed matter
… chain. The coupled Majorana modes form a non-local Dirac fermionic state which determines the ground state fermion parity. The dependance of the fermion parity on the parameters of the system is purely determined by the oscillatory part of the Majorana wavefunctions. Using transfer matrix …
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Non-equilibrium dynamics in three-dimensional magnetic spin models and molecular motor-inspired one-dimensional exclusion processes
We investigate the relaxation dynamics of two distinct non-equilibrium processes: relaxation of three-dimensional antiferromagnetic lattice spin models with Heisenberg interaction following a critical quench, and a one-dimensional exclusion process inspired by the gear-like motion of molecular …
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Dynamics of impurities and trapped Bose-Einstein Condensates
… tools to explore new frontiers in the context of non-equilibrium dynamics. These possibilities can be used for a wide variety of applications, ranging from quantum simulations to quantum metrology. In this thesis, we investigate designing the confinement of tightly trapped impurities in a BEC …
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Topology, localization, and spontaneous symmetry breaking in nonequilibrium many-body systems
… setting. Under a generic drive, the steady equilibrium state is most likely an infinite-temperature featureless thermal state. However, there exist exceptional cases where thermalization either does not happen or is delayed for a sufficiently long time, called non-equilibrium many-body …
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Imaging the dynamics of soft materials at microscale and nanoscale
… microscope, have been utilized to capture the dynamics of three distinct yet typical soft materials in situ at different length scales: colloids, polymeric chains, and nanobubbles. While conventional interests have been focused on the equilibrium structures and properties of soft materials, we …
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Multipole Symmetries and Many Body Physics
… ramifications for both quantum ground states and non-equilibrium dynamics. Particular emphasis is placed on Hubbard models with dipole moment conservation, which are of special interest due to their ability to be experimentally realized in strongly tilted optical lattices. The bosonic versions of …
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Feedback control design for closed-loop oscillations via dominant system theory
Stable oscillations, arising from nonlinear non-equilibrium dynamics, are an important class of behavior in both nature and engineering. For engineering applications like robotic locomotion, it is usually desirable to induce oscillations in a controlled manner. While plenty of feedback control …
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Generalized contact processes in ecology
… applies principles of statistical physics and non-equilibrium dynamics to problems of scale, randomness, and growth in plant communities. It includes three projects related by their methodology and distinct in the nature of their applications. In the first project, we analyze the relationship …
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