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 230 for “"condensates"”.
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Polymorphism of Protein Condensates
Protein misfolding followed by aggregation is the major cause of neurodegenerative diseases such as Alzheimer’s, Parkinson’s, familial amyloid poly neuropathy (FAP), Huntington’s, type-II diabetes, etc. Common aspect of all protein aggregation diseases is the altered protein conformation known as …
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Biomolecular Condensates in Transcriptional Regulation
… decades. However, recent study of biomolecular condensates has reframed our understanding of these cooperative interactions. Condensates are membrane-less compartments that concentrate components involved in the same biochemical processes. This thesis examines the formation and function of …
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Quantum metrology with Bose-Einstein condensates
… rotation measurements using Bose-Einstein condensates, that are robust to losses. We begin by describing how, by loading a Bose-Einstein condensate into an optical ring lattice, multiport beam splitters are created through a simple raising and lowering of potential barriers between sites. …
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Functionalizing Synthetic Cells: Membranes and Condensates
Contains fulltext : 295327.pdf (Publisher’s version ) (Open Access)
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Holographic superconductor with multiple competing condensates
… superconducting system in which multiple condensates compete. In the gravitational description, our system begins with two non-interacting Abelian Higgs multiplets, each comprised of a vector and a charged scalar. This describes a system with two independent condensates. Coupling the …
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Bose condensates and the atom laser
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1998.
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Quantum reflection of Bose-Einstein Condensates
… in atom optics have brought Bose-Einstein condensates within 1 pm of solid surfaces where the atom-surface interactions can no longer be ignored. At long- range, the atom-surface interaction is described by the weakly attractive Casimir-Polder potential which is classically predicted to …
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Coherent decay of Bose-Einstein condensates
… of matter known to exist, atomic Bose-Einstein condensates are unique forms of matter where the constituent atoms lose their individual identities, becoming absorbed into the cloud as a whole. Effectively, these gases become a single macroscopic object that inherits its properties directly from …
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Targeting and Manipulating Endogenous Transcriptional Condensates
Biomolecular condensates are membraneless compartments composed of selectively concentrated biomolecules with liquid-like properties. In this thesis, we discuss our discoveries showing that biomolecular condensates are associated with transcription. However, tools to study transcriptional …
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Bogoliubov Excitations of Inhomogeneous Bose-Einstein Condensates
… deals with repulsively interacting Bose-Einstein condensates in speckle disorder potentials. In the Bogoliubov approach, the many-body problem is split into the Gross-Pitaevskii condensate (mean-field) and the Bogoliubov excitations, which are bosonic quasiparticles. The disorder potential causes …
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Vacuum structure and condensates in quantum chromodynamics
Klassiek wordt de grondtoestand van een model bepaald door na te gaan of er een globaal minimum van de potentiaal bestaat. Dit minimum correspondeert met de meest stabiele toestand van het model. Het concept van een klassieke potentiaal kan uitgebreid worden tot de zogenaamde kwantum effectieve …
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Hollow condensates, topological ladders and quasiperiodic chains
… address the physics of hollow Bose-Einstein condensates and the behavior of vortices within them then discuss localization-delocalization physics of one-dimensional quasiperiodic models, and end by focusing on the physics of localized edge modes and topological phases in quasi-one-dimensional …
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⁸⁷Rubidium Bose-Einstein condensates in optical lattices
Bose-Einstein condensates in optical lattices have proven to be a powerful tool for studying a wide variety of physics. In this thesis a series of experiments using optical lattices to manipulate 87Rb Bose-Einstein condensates are described. A systematic shift of the photon recoil momentum due to …
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Manipulating Bose-Einstein condensates with laser light
A dilute gas Bose-Einstein condensate was probed and manipulated by off-resonant laser beams. Spontaneous and stimulated off-resonant light scatterings were studied experimentally. Stimulated, two-photon Bragg scattering was used for spectroscopic measurement of the mean-field energy and of the …
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Dynamic properties of dilute Bose-Einstein condensates
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
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Microtraps and waveguides for Bose-Einstein condensates
Gaseous Bose-Einstein condensates containing up to 3 x 10⁶ ²³Na atoms were loaded into magnetic microtraps and waveguides on a microfabricated "atom chip" using optical tweezers. Single-mode propagation was observed along the waveguide. Closer to the microfabricated surface, perturbations to the …
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Effects of interaction in Bose-Einstein condensates
… - in the various properties of Bose-Einstein condensates (BEC). The phonon wavefunction in a BEC was measured using Bragg spectroscopy and compared with the well-known Bogoliubov theory. Phonons were first excited in a BEC of 3 x 107 condensed 23Na atoms via small-angle two-photon Bragg …
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Dynamics of impurities and trapped Bose-Einstein Condensates
… experiments with cold atoms, and Bose-Einstein condensates, in particular, allows us to design systems with chosen geometries. These provide us with simple model systems that are well understood from first principles microscopically, and with parameters controlled by external fields, as tools to …
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Localisation of Bose-Einstein condensates in optical lattices
The properties of Bose-Einstein condensates can be studied and controlled effectively when trapped in optical lattices formed by two counter-propagating laser beams. The dynamics of Bose-Einstein condensates in optical lattices are well-described by a continuous model using the Gross-Pitaevskii …
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Interaction of phenol-formaldehyde condensates with isoprene rubber
… between p-tertiary butyl phenol-formaldehyde condensates and isoprene rubber under conditions resembling those used in industrial vulcanization processes, and involves investigations of reaction rates, mechanisms of reactions and structures produced. The work is an extension of an earlier …
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