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Dissertations / Theses on the topic 'Hamiltonians'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 September 2023

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1

ABENDA, SIMONETTA. "Analysis of Singularity Structures for Quasi-Integrable Hamiltonian Systems." Doctoral thesis, SISSA, 1994. http://hdl.handle.net/20.500.11767/4499.

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2

Nagaj, Daniel. "Local Hamiltonians in quantum computation." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45162.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 169-176).<br>In this thesis, I investigate aspects of local Hamiltonians in quantum computing. First, I focus on the Adiabatic Quantum Computing model, based on evolution with a time- dependent Hamiltonian. I show that to succeed using AQC, the Hamiltonian involved must have local structure, which leads to a result about eige

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3

Assis, Paulo. "Non-Hermitian Hamiltonians in field theory." Thesis, City University London, 2009. http://openaccess.city.ac.uk/2118/.

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This thesis is centred around the role of non-Hermitian Hamiltonians in Physics both at the quantum and classical levels. In our investigations of two-level models we demonstrate [1] the phenomenon of fast transitions developed in the PT -symmetric quantum brachistochrone problem may in fact be attributed to the non-Hermiticity of evolution operator used, rather than to its invariance under PT operation. Transition probabilities are calculated for Hamiltonians which explicitly violate PT -symmetry. When it comes to Hilbert spaces of infinite dimension, starting with non-Hermitian Hamiltonians

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4

Ramaswami, Geetha Pillaiyarkulam. "Numerical solution of special separable Hamiltonians." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627541.

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5

Moore, David Jeffrey. "Non-adiabatic Berry phases for periodic Hamiltonians." Thesis, University of Canterbury. Physics, 1991. http://hdl.handle.net/10092/8072.

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A method for the calculation of Berry phases for periodic, but not necessarily adiabatic, Hamiltonians is reported. This method is based on a novel factorisation of the evolution operator and is in the spirit of the theory of systems of linear differential equations with periodic coefficients. The use of this approach in practical situations is greatly facilitated by exploiting the Fourier decomposition of the Hamiltonian. This converts the problem into an equivalent time-independent form. The solution to the problem is then expressible in terms of the eigenvectors and eigenvalues of a certai

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6

Yildirim, Yolcu Selma. "Eigenvalue inequalities for relativistic Hamiltonians and fractional Laplacian." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31649.

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Thesis (Ph.D)--Mathematics, Georgia Institute of Technology, 2010.<br>Committee Chair: Harrell, Evans; Committee Member: Chow, Shui-Nee; Committee Member: Geronimo, Jeffrey; Committee Member: Kennedy, Brian; Committee Member: Loss, Michael. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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7

Bartlett, Bruce. "Flow equations for hamiltonians from continuous unitary transformations." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53428.

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Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: This thesis presents an overview of the flow equations recently introduced by Wegner. The little known mathematical framework is established in the initial chapter and used as a background for the entire presentation. The application of flow equations to the Foldy-Wouthuysen transformation and to the elimination of the electron-phonon coupling in a solid is reviewed. Recent flow equations approaches to the Lipkin model are examined thoroughly, paying special attention to their utility near the phase change boundary. We pre

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8

Duffus, Stephen N. A. "Open quantum systems, effective Hamiltonians and device characterisation." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/33672.

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We investigate the some of the many subtleties in taking a microscopic approach to modelling the decoherence of an Open Quantum System. We use the RF-SQUID, which will be referred to as a simply a SQUID throughout this paper, as a non-linear example and consider different levels of approximation, with varied coupling, to show the potential consequences that may arise when characterising devices such as superconducting qubits in this manner. We first consider a SQUID inductively coupled to an Ohmic bath and derive a Lindblad master equation, to first and second order in the Baker-Campbell-Hausd

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9

Hyder, Asif M. "Green's operator for Hamiltonians with Coulomb plus polynomial potentials." California State University, Long Beach, 2013.

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10

Engeler, Marco Bruno Raphael. "New model Hamiltonians for improved orbital basis set convergence." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/54563/.

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The standard approach in quantum chemistry is to expand the eigenfunctions of the non relativistic Born Oppenheimer Hamiltonian in terms of Slater determinants. The quality improvements of such wavefunctions in terms of the underlying one electron basis is frustratingly slow. The error in the correlation energy decreases only with L 3 where L is the maximum angular momentum present in the basis. The integral evaluation effort that grows with 0(N4) prevents the use of ever larger bases for obtaining more accurate results. Most of the developments are therefore focused on wavefunction models wit

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11

Kaasalainen, Mikko K. J. "On the construction of invariant tori and integrable Hamiltonians." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:399aa26d-4f86-4100-81e2-ba34b6def947.

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The main principle of this thesis is to employ the geometric representation of Hamiltonian dynamics: in a broad sense, we study how to construct, in phase space, geometric structures that are related to a dynamical system. More specifically, we study the problem of constructing phase-space tori that are approximate invariant tori of a given Hamiltonian; also, using the constructed tori, we define an integrable Hamiltonian closely approximating the original one. The methods are generally applicable; as examples, we use gravitational potentials that are of interest in stellar dynamics. First, we

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12

Wessels, Gert Jermia Cornelus. "A numerical and analytical investigation into non-Hermitian Hamiltonians." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2894.

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Thesis (MSc (Physical and Mathematical Analysis))--University of Stellenbosch, 2009.<br>In this thesis we aim to show that the Schr odinger equation, which is a boundary eigenvalue problem, can have a discrete and real energy spectrum (eigenvalues) even when the Hamiltonian is non-Hermitian. After a brief introduction into non-Hermiticity, we will focus on solving the Schr odinger equation with a special class of non-Hermitian Hamiltonians, namely PT - symmetric Hamiltonians. PT -symmetric Hamiltonians have been discussed by various authors [1, 2, 3, 4, 5] with some of them focusing spec

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13

Musumbu, Dibwe Pierrot. "The metric for non-Hermitian Hamiltonians : a case study." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/17403.

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Thesis (MSc)--University of Stellenbosch, 2006.<br>ENGLISH ABSTRACT: We are studying a possible implementation of an appropriate framework for a proper non- Hermitian quantum theory. We present the case where for a non-Hermitian Hamiltonian with real eigenvalues, we define a new inner product on the Hilbert space with respect to which the non-Hermitian Hamiltonian is Quasi-Hermitian. The Quasi-hermiticity of the Hamiltonian introduces the bi-orthogonality between the left-hand eigenstates and the right-hand eigenstates, in which case the metric becomes a basis transformation. We use the n

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14

Santos, Filipe André Paulino. "Bochi-Mañé dichotomy for 2n-Hamiltonians, Random Perturbation Techniques." Doctoral thesis, Instituto Superior de Economia e Gestão, 2020. http://hdl.handle.net/10400.5/20575.

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Doctor in Applied Mathematics for Economics and Management<br>We prove the high dimensional version of the Bochi-Mañé dichotomy for Hamiltonian systems, achieving for the fi rst time in a continuous setting such a general result. That is, we nd the existence of a C2-residual set of Hamiltonians for which there is an open mod 0 dense set of regular energy surfaces each being either Anosov or for almost every x, either LE(x) = 0 or there is a partially hyperbolic splitting . A generalization of Bochi's random perturbative technique is developed and used in the Hamiltonian framework, to show the

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15

Gutiérrez, i. Serrés Pere. "Estabilitat efectiva i tors invariants de sistemes hamiltonians quasi-integrables." Doctoral thesis, Universitat de Barcelona, 1995. http://hdl.handle.net/10803/2108.

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La memòria recull contribucions a diversos aspectes del problema de l'estabilitat en sistemes hamiltonians quasi-integrables. Aquests aspectes inclouen resultats d'estabilitat efectiva, que comporten el confinament de trajectòries durant un interval de temps molt gran, i també resultats que estableixen l'existència de tors invariants, entre els quals distingim els tors KAM i tors de dimensió inferior.<br/><br/>Considerem un sistema hamiltonià quasi-integrable, amb <i>n</i> graus de llibertat, en el qual la mida de la pertorbació és "Epsilon". Malgrat la possibilitat de difusió en aquest tipus

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16

Krüger, Andreas. "Effective hamiltonians from field theory for one and two nucleons." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961473347.

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17

Bookatz, Adam Darryl. "Control, gates, and error suppression with Hamiltonians in quantum computation." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104502.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>In this thesis we are primarily interested in studying how to suppress errors, perform simulation, and implement logic gates in quantum computation within the context of using Hamiltonian controls. We also study the complexity class QMA-complete. We first investigate a method (introduced by Jordan, Farhi, and Shor) for suppressing environmentally induced errors in Hamiltonian-based quantum computation, involving encoding the sys

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18

Ziraldo, Simone. "Thermalization and relaxation after a quantum quench in disordered Hamiltonians." Doctoral thesis, SISSA, 2013. http://hdl.handle.net/20.500.11767/4817.

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In the present thesis we study the unitary dynamics and the thermalization properties of free-fermion-like Hamiltonians after a sudden quantum quench in presence of disorder. With analytical and numerical arguments, we show that the existence of a stationary state and its description with a generalized Gibbs ensemble (GGE) depend crucially on the observable considered (local versus extensive, one-body versus many-body) and on the localization properties of the final Hamiltonian. We then show an extension of the Wang-Landau algorithm which allows the computation of weighted distributions associ

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19

Freund, Silvia [Verfasser], and Stefan [Akademischer Betreuer] Teufel. "Effective Hamiltonians for magnetic Bloch bands / Silvia Freund ; Betreuer: Stefan Teufel." Tübingen : Universitätsbibliothek Tübingen, 2013. http://d-nb.info/1162844701/34.

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20

Richter, Steffen, Tom Michalsky, Lennart Fricke, Chris Sturm, Helena Franke, Marius Grundmann, and Rüdiger Schmidt-Grund. "Maxwell consideration of polaritonic quasi-particle Hamiltonians in multi-level systems." American Institute of Physics, 2015. https://ul.qucosa.de/id/qucosa%3A31195.

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We address the problem of the correct description of light-matter coupling for excitons and cavity photons in the case of systems with multiple photon modes or excitons, respectively. In the literature, two different approaches for the phenomenological coupling Hamiltonian can be found: Either one single Hamiltonian with a basis whose dimension equals the sum of photonic modes and excitonic resonances is used. Or a set of independent Hamiltonians, one for each photon mode, is chosen. Both are usually used equivalently for the same kind of multi-photonic systems which cannot be correct. However

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21

Fagerlund, Alexander, and Chistopher Ekman. "Finite-dimensional PT-symmetric Hamiltonians with an application to neutrino oscillations." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275690.

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In this report, we first briefly summarize Hermitian quantum mechanics before moving on to the non-Hermitian case. We then review PT-symmetric quantum mechanics with a focus on finite-dimensional systems, and include a novel generalization of a perturbative calculation of the C-operator. After briefly covering the basics of neutrino oscillations, we perturbatively examine a PT-symmetric addition to the neutrino oscillation Hamiltonian. We examine the effects of the addition with two different definitions of transition probabilities. However, probability is not conserved to first order with eit

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22

Kirtschig, Frank. "Topological k.p Hamiltonians and their applications to uniaxially strained Mercury telluride." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-226489.

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Topological insulators (TIs) are a new state of quantum matter that has fundamentally challenged our knowledge of insulator and metals. They are insulators in the bulk, but metallic on the edge. A TI is characterized by a so-called topological invariant. This characteristic integer number is associated to every mapping between two topological spaces and can be defined for an electronic system on the lattice. Due to the bulk-edge correspondence a non-trivial value leads to topologically protected edge states. To get insight into the electronic characteristics of these edge/surface states, howev

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23

Miller, Steven Michael. "Scattering and Van der Waals dynamics of Hâ†2-OH(#CHI#'2#PI#)." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309145.

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24

Wijewardena, Udagamge. "Iterative method of solving schrodinger equation for non-Hermitian, pt-symmetric Hamiltonians." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2016. http://digitalcommons.auctr.edu/dissertations/3194.

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PT-symmetric Hamiltonians proposed by Bender and Boettcher can have real energy spectra. As an extension of the Hermitian Hamiltonian, PT-symmetric systems have attracted a great interest in recent years. Understanding the underlying mathematical structure of these theories sheds insight on outstanding problems of physics. These problems include the nature of Higgs particles, the properties of dark matter, the matter-antimatter asymmetry in the universe, and neutrino oscillations. Furthermore, PT-phase transition has been observed in lasers, optical waveguides, microwave cavities, superconduct

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25

Gaim, Wolfgang [Verfasser]. "Higher Order Semiclassical Approximations for Hamiltonians with Operator-Valued Symbols / Wolfgang Gaim." Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/1235399141/34.

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26

Stagno, Gabriele Vittorio. "Quantum cosmology in loop quantum gravity : 2-vertex spinfoam amplitudes and effective hamiltonians." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0190.

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Nous avons d'abord étudié les amplitudes de transition entre deux réseaux de spin limite avec diagramme dipolaire, fournis par l'EPRL spinfoam Lorentz modèle avec 2 sommets non-simpliciaux. Une évaluation systématique de ces amplitudes de transition ont été abordées, en identifiant lesquels étaient pertinents pour processus physiques. Grande échelle de spin le comportement et les corrélations entre la limite initiale et finale ont été exquis analytiquement pour un modèle simplifié et numériquement pour le modèle complet, en trouvant que les contributions de différents graphiques peuvent être o

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27

Moriya, Paulo Hisao. "Manipulação do pulso superradiante via interações atômicas." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-07052012-135135/.

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O fenômeno da superradiância é caracterizado por um processo de ordenamento das transições dos dipolos atômicos em amostras excitadas, moderadamente densas, decorrente das correlações induzidas entre os átomos desenvolvidas pela radiação coerente emitida pelos próprios átomos. O processo superradiante que é iniciado a partir de uma total desordem em t = 0 atinge um ordenamento máximo em um tempo τ α N-1, gerando um pulso de radiação de intensidade seguindo a lei do sech2 e com pico proporcional à N2, e em seguida os dipolos relaxam para um equilíbrio desordenado. Neste trabalho, trat

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28

Abreu, Jean Faber Ferreira de. "Quantum games from biophysical Hamiltonians and a sub-neuronal optimization criterion of the information." Laboratório Nacional de Computação Científica, 2006. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=108.

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The Theory of Games is a mathematical formalism used to analyze conflicts between two or more parts. In those conflicts, each part has a group of actions (strategies) that aids them in the optimization of their objectives. The objectives of the players are the rewards (payoffs) given according to their chosen strategy. By quantizing a game, advantages in operational efficiency and in the stability of the game solutions are demonstrated. In a quantum game, the strategies are operators that act on an isolated system. A natural issue is to consider a game in an open system. In this case the strat

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29

Okan, Osman Burak. "Merging quadratic programming with kernel smoothing for automated cluster expansions of complex lattice Hamiltonians." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44383.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.<br>Includes bibliographical references (p. 46-48).<br>We present a general outline for automating cluster expansions of configurational energetics in systems with crystallographic order and well defined space group symmetry. The method presented herein combines constrained optimization techniques of positive-definitive quadratic forms with the mathematical tool of Tikhonov regularization (kernel smoothing) for automated expansions of an arbitrary general physical property without compromisin

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30

Fassari, Silvestro. "Spectral properties of relativistic and non-relativistic Krönig- Penney Hamiltonians with short-range impurities." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54524.

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In this work, we investigate the spectrum of the non-relativistic Krönig-Penney Hamiltonian H<sub>α</sub>= -d²/dx² +αΣ<sub>m∈Z</sub>δ(-(2m+1)π) perturbed by a short-range potential λW and the spectrum of its relativistic counterpart obtained by replacing the Schrödinger Hamiltonian H<sub>α</sub> with its relativistic analogue H̅<sub>α</sub>. The interesting feature of both spectra is that they have gaps and that bound states may occur in such gaps as a consequence of the presence of the short-range potential representing the impurity. Such bound states, often called "impurity states" in the s

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31

Liu, Yimin. "Theory of vibronic coupling in impurity systems." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282583.

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32

Jorba-Cuscó, Marc. "Periodic time dependent Hamiltonian systems and applications." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/666655.

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A dynamical system is one that evolves with time. This definition is so diffuse that seems to be completely useless, however, gives a good insight of the vast range of applicability of this field of Mathematics has. It is hard to track back in the history of science to find the origins of this discipline. The works by Fibonacci, in the twelfth century, concerning the population growth rate of rabbits can be already considered to belong to the above mentioned field. Newton's legacy changed the prism through the humankind watched the universe and established the starting shot of several areas of

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33

Maurice, Rémi. "Zero-field anisotropic spin hamiltonians in first-Row transition metal complexes : theory, models and applications." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/37363.

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Aquest treball presenta l’estudi teòric de l’anisotropia magnètica en complexos de metalls de transició, combinant esquemes de càlcul multiconfiguracionals relativistes amb derivacions analítiques basades en la teoria del camp del lligand, el que permet racionalitzar a través de conceptes senzills els resultats quantitatius obtinguts i interpretar les propietats estudiades. Es desenvolupa primer una metodologia per extreure els paràmetres d’anisotropia en complexos mononuclears de metalls de transició. El mètode es basa en assignar els resultats d’un càlcul ab initio d’alt nivell a un Hamilto

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34

Schnells, Vera [Verfasser], Martin [Gutachter] Greiter, Haye [Gutachter] Hinrichsen, and Friedrich [Gutachter] Reinert. "Fractional Insulators and their Parent Hamiltonians / Vera Schnells ; Gutachter: Martin Greiter, Haye Hinrichsen, Friedrich Reinert." Würzburg : Universität Würzburg, 2019. http://d-nb.info/1193423813/34.

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35

Farid, Amro M. (Amro Mohsen) 1978. "Compensation of incoherent errors in the precise implementation of effective Hamiltonians for quantum information processing." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/89348.

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36

Schmidt, Julian [Verfasser], and Stefan [Akademischer Betreuer] Teufel. "Interior-Boundary Conditions as a Direct Description of QFT Hamiltonians / Julian Schmidt ; Betreuer: Stefan Teufel." Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/1205002065/34.

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37

Mehringer, Josef [Verfasser], and Edgardo [Akademischer Betreuer] Stockmeyer. "Spectral and dynamical properties of certain quantum hamiltonians in dimension two / Josef Mehringer. Betreuer: Edgardo Stockmeyer." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1080122257/34.

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38

Ezzahra, Lembarki Fatima. "Periodic orbits of differential systems via the averaging theory with special emphasis on Hamiltonian systems." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/400392.

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39

Calci, Angelo Verfasser], Robert [Akademischer Betreuer] Roth, and Jochen [Akademischer Betreuer] [Wambach. "Evolved Chiral Hamiltonians at the Three-Body Level and Beyond / Angelo Calci. Betreuer: Robert Roth ; Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110901984/34.

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40

Calci, Angelo [Verfasser], Robert Akademischer Betreuer] Roth, and Jochen [Akademischer Betreuer] [Wambach. "Evolved Chiral Hamiltonians at the Three-Body Level and Beyond / Angelo Calci. Betreuer: Robert Roth ; Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-40698.

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41

Neto, Flávio de Oliveira. "Hamiltoniano Intensity Dependent na teoria do laser." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-04052016-155606/.

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Tem-se como intuito desse projeto a construção e o desenvolvimento de um Hamiltoniano intensity dependent, cuja interação entre radiação-matéria dependa do número de fótons que residem dentro da cavidade do laser. O Hamiltoniano de Jaynes Cummings é tradicionalmente conhecido por descrever a interação radiação-matéria, e através de uma modificação efetuada no mesmo, criando um Hamiltoniano não-linear em termos dos operadores de criação e aniquilação, pretende-se obter uma nova distribuição do número de fótons dentro de tal cavidade, bem como uma nova estatística em relação ao modelo usual de l

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42

Pacha, Andújar Juan Ramón. "On the quasiperiodic hamiltonian andronov-hopf bifurcation." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/5830.

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Aquest treball es situa dintre del marc dels sistemes dinàmics hamiltonians de tres graus de llibertat. Allà considerem famílies d'òrbites periòdiques amb una transició estable-complex inestable: sigui L el paràmetre que descriu la família i suposarem que per a valors del paràmetre més petits que un cert valor crític, L', els multiplicadors característics de les òrbites periòdiques corresponents hi són sobre el cercle unitat, quan L=L' aquests col·lisionen per parelles conjugades (òrbita ressonant o crítica) i per L > L', abandonen el cercle unitat cap al pla complex (col·lisió de Krein amb s

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43

O'Hara, Michael James. "Adiabatic quantum computation noise in the adiabatic theorem and using the Jordan-Wigner transform to find effective Hamiltonians /." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8113.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Applied Mathematics and Scientific Computation Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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44

Hogan-O'Neill, Jason. "Interface effects in superconductors : self-consistent solution of the Bogoliubov-de Gennes equations via the recursion method." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302164.

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45

Morgan, Samuel Alexander. "A gapless theory of Bose-Einstein condensation in dilute gases at finite temperature." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302178.

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46

Stosiek, Matthias [Verfasser], Ferdinand [Akademischer Betreuer] Evers, and Jaroslav [Akademischer Betreuer] Fabian. "Self-consistent-field ensembles of disordered Hamiltonians: Efficient solver and application to superconducting films / Matthias Stosiek ; Ferdinand Evers, Jaroslav Fabian." Regensburg : Universitätsbibliothek Regensburg, 2020. http://d-nb.info/1216703604/34.

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47

Agostinelli, Chiara. "Edge states and zero modes in quadratic fermionic models on a 1-D lattice." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9344/.

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Abstract:

In una formulazione rigorosa della teoria quantistica, la definizione della varietà Riemanniana spaziale su cui il sistema è vincolato gioca un ruolo fondamentale. La presenza di un bordo sottolinea l'aspetto quantistico del sistema: l'imposizione di condizioni al contorno determina la discretizzazione degli autovalori del Laplaciano, come accade con condizioni note quali quelle periodiche, di Neumann o di Dirichlet. Tuttavia, non sono le uniche possibili. Qualsiasi condizione al bordo che garantisca l'autoaggiunzione dell' operatore Hamiltoniano è ammissibile. Tutte le possibili bounda

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48

Bieske, Evan John, and n/a. "The Electronic Spectroscopy of Neutral and Ionic Clusters." Griffith University. School of Science, 1989. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20051109.112502.

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Abstract:

This thesis is concerned with weakly bound neutral and ionic clusters. Spectra of the region near the S1fS0 electronic origin of four neutral van der Waals molecules - aniline-argon, phenol-argon, chlorobenzene-argon and fluorobenzene-argon - were obtained using resonance enhanced multiphoton ionization (REMPI). These spectra indicate that Fermi resonances between van der Waals stretching and bending motions are important in these molecules. Effective Hamiltonians are constructed that describe well the low frequency vibrations. In order to better discuss the low frequency van der Waals motions

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49

Andre, Daniel Batista. "Weyl expansion for multicomponent wave equations." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310887.

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50

Bieske, Evan John. "The Electronic Spectroscopy of Neutral and Ionic Clusters." Thesis, Griffith University, 1989. http://hdl.handle.net/10072/367202.

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Abstract:

This thesis is concerned with weakly bound neutral and ionic clusters. Spectra of the region near the S1fS0 electronic origin of four neutral van der Waals molecules - aniline-argon, phenol-argon, chlorobenzene-argon and fluorobenzene-argon - were obtained using resonance enhanced multiphoton ionization (REMPI). These spectra indicate that Fermi resonances between van der Waals stretching and bending motions are important in these molecules. Effective Hamiltonians are constructed that describe well the low frequency vibrations. In order to better discuss the low frequency van der Waals motions

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