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 87 for “"thermalization"”.
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Aspects of Eigenstate Thermalization
… quantum many-body systems, the eigenstate thermalization hypothesis (ETH) posits that energy eigenstates contain the properties of equilibrium ensembles. Many subsequent devel- opments have demonstrated the centrality of random matrix theory and free probability to the ETH. This thesis …
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NMR studies of quantum thermalization
Quantum thermalization is a generic process that a quantum system reaches its equilibrium. Quantum thermalization lies in the interface of various distinct fields, ranging from condensed matter physics and quantum cosmology to quantum information science. The converging efforts from different …
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A simplified theory of neutron thermalization
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1960.
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Fusion-Product Transport in Axisymmetric Tokamaks: Losses and Thermalization
High-energy fusion-product losses from an axisymmetric tokamak plasma are studied. Prompt-escape loss fluxes (i.e. prior to slowing down) are calculated including the non-separable dependence of flux as a function of poloidal angle and local angle-of-incidence at the first wall. The flux is …
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A Monte Carlo analysis of neutron thermalization in graphite
The 250 Kev Cockroft - Walton accelerator currently under construction at Virginia Polytechnic Institute is to be used as a pulsed neutron source. The time dependence of neutron flux, energy spectrum as a function of time, and various reactor parameters such as Fermi Age, slowing dotm time, and …
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Chaos and Thermalization in Quantum Many-Body Systems and Gravity
In this thesis, we explore the process of thermalization in chaotic quantum many-body systems with the help of concepts and techniques from quantum information theory. We identify a universal dynamical process in the Heisenberg evolution of operators known as void formation, and use it to provide a …
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Beam-Ion Transport in Tokamaks: Thermalization in Large Orbit-Width Regime
"Comparison with the present results shows that the small orbit-width approximation introduces $\ge$5% errors in the density, parallel momentum, and energy moments when $\rho\sb{\theta}/L = 0.86$ in low-$Z\sb{\rm eff}$ plasmas. These results are observed for all source pitch-angles studied except …
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Effects of interactions on correlation, thermalization, and transport of exciton-polaritons
Light-matter interactions are fundamental processes that allow us not only to interrogate material properties but also to coherently control material phases that cannot be reached otherwise. Matter-matter interactions, on the other hand, result in strong correlations and emergent behavior that …
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Neutron thermalization in crystalline media-calculation of fermi age to thermal energy
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1959.
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Ion thermalization and wave excitation downstream of Earth's bow shock: Theory and observation
<p>It has been well documented that the plasma immediately downstream of Earth's quasi-perpendicular bow shock, which consists of reflected protons and directly transmitted ions with large temperature anisotropies, is unstable to the excitation of ion-cyclotron waves. These waves in turn scatter …
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The Stochastic Modelling of Fusion Product Transport and Thermalization With Nuclear Elastic Scattering
Made available in DSpace on 2014-12-16T04:17:34Z (GMT). No. of bitstreams: 1 8409908.pdf: 6558995 bytes, checksum: 5af1a79c7cccad3722f423f6883e69d2 (MD5) Previous issue date: 1983
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Strongly correlated quantum fluids and effective thermalization in non-Markovian driven-dissipative photonic systems
… equilibration. Such effect that we call ``pseudo-thermalization'' implies that under very specific conditions, an open quantum system can present all the properties of an equilibrated one in spite of the presence of an highly non equilibrated environment. The results of this Chapter are based on …
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Design of the electron spectrometer for the HUNTER experiment and timescale of electron thermalization in liquid Argon for directional detection of WIMP dark matter
… peculiar microphysics of liquid Argon requires thermalization of ionization electrons for a signal to form. To determine if directional information can be extracted, one needs to understand the energy spectrum of the electrons emitted in recoil event. Then, one needs a model to determine the …
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Localization properties of nonlinear disordered lattices
… approximations. Part III deals with the thermalization in short disordered chains. First, the term thermalization and its application to the system in use is explained. Then, results of numerical simulations on this topic are presented where the focus lies especially on the energy …
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Anomalous quantum dynamics in scarred and integrable systems
… This thesis presents scenarios in which such thermalization does not occur. Firstly, we establish the quantum integrability of the central spin-1 XX model by constructing its Bethe ansatz eigenstates and an extensive set of conserved charges. These charges prevent the central spin from …
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Dynamics of pions in ultrarelativistic heavy ion collisions
… in the central region. We investigate the thermalization and freezeout stages of the nuclear collision, in which the system is far from local equilibrium. The rapid expansion of a directly-formed (as opposed to post-hadronization) pion fluid results in a novel, partially thermalized flow, …
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Assessing materials quality for high efficiency electricity generation
Thermalization losses drastically reduce the efficiency of silicon solar cells. In an age where we need sustainable energy production more than ever, silicon is the best material to target due to its high stake in the sustainable energy market. An organic-inorganic solar cell hybrid of …
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Energy and heat transport in molecules
We investigate the effect of thermalization and boundary conductance of the various molecular junctions using the Fermi's golden rule type of theoretical, computational arrangements. The studied systems have a wide range of advanced technological application. The quantification of the energy …
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