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 12 of 12 for “"Bose-Hubbard model"”.
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Spatio-temporal dynamics of the disordered Bose-Hubbard model
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Few- and many-body physics of dipoles in ion traps and optical lattice simulators
… we present the first ab-initio and microscopic model for this noise. This model attributes the noise to fluctuating dipoles formed by adsorbates bound on the trap surface. The second part of the thesis studies three different lattice boson systems. First, we study the Bose-Hubbard model for …
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Quantum Dynamics of Strongly-Interacting Bosons in Optical Lattices with Disorder
… dynamics of states derived from the disordered Bose-Hubbard model in a trapping potential. We find that the edge states in the trap allow center of mass motion even with insulating states in the center. We identify short and long-time mechanisms for edge state transport in insulating phases. We …
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An Exploration of Quantum Critical Phenomena in One-Dimensional Lattice Systems: Geometric Frustration & Quantum Fluctuations
… and we will explore an extension of the standard Bose-Hubbard model on a one-dimensional lattice with a non-trivial elementary cell.<br/><br/>Our first main focus will be on the use of entanglement scaling as an indicator of when a phase transition has occurred, more specifically for first-order …
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Strongly correlated ultra-cold bosonic atoms in optical lattices
… since cold atom experiments provide a control on model parameters.<br><br> In this thesis, we use novel analytical and computational techniques to treat strongly interacting bosonic systems. Taking advantage of the very versatile quantum Monte Carlo Stochastic Green Function algorithm, we studied …
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Compressibility of a bosonic Mott-insulator in a disordered optical lattice
… Much of the impediment to progress is that the models thought to contain the essential ingredients that give rise to the observed behavior cannot be solved analytically and require prohibitive amounts of computational resources in order to simulate numerically. These limitations are exacerbated …
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Aspects of Quantum Fluctuations under Time-dependent External Influences
… Afterwards, we turn our attention towards Bose-Einstein condensates, a laboratory system. Since most of our calculations are performed using a mean-field expansion, we will study the accuracy of a finite-range interaction potential onto such an expansion. Exploiting the universality of …
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Non-equilibrium dynamics of ultracold atoms in optical lattices
… 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 Bose-Hubbard Model. The quench …
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Dynamics of ultracold bosons in a disordered optical lattice
… a disordered optical lattice to realize the 3D Bose Hubbard model, with independently, dynamically tunable lattice depth and disorder strength. The equilibrium behavior of the Bose Hubbard and disordered Bose Hubbard models are understood, but there are many outstanding questions about dynamics. …
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Properties of dirty bosons in disordered optical lattices
The study of the disordered Bose-Hubbard model is key to understanding the interplay of disorder and interactions. Despite many studies with uniform diagonal disorder, few have inquired into experimental realizations with an additional correlated off-diagonal disorder. The presence of a trap and …
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Dynamics and properties of massive quantum vortices in binary mixtures of Bose-Einstein condensates
L'abstract è presente nell'allegato / the abstract is in the attachment
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Strongly correlated quantum fluids and effective thermalization in non-Markovian driven-dissipative photonic systems
… collective behaviours such as the celebrated Bose-Einstein Condensation (BEC) phase transition, where a macroscopic fraction of a bosonic system of particles collapses below a critical temperature T_c on a single-particle state. Quantum coherence, when combined with inter-particle …