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Showing 1 to 20 of 128 for “"Quantum theory"”.
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Quantum Theory of Glasses
The quantum excitations in glasses have long presented a set of puzzles for condensed matter scientists. A common view is that they are largely disordered analogs of elementary excitations in crystals, supplemented by two level systems which are chemically local entities coming from disorder. This …
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Quantum theory of optical solitons
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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Quantum theory of mode locking.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1971
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The Classical Limit of Quantum Theory
<p>This essay treats of the relationship between quantum and classical mechanics. Both physicists and philosophers hold that quantum mechanics reduces to classical mechanics as ħ→0, or that classical mechanics is a special case of quantum mechanics in this limit. If one theory reduces to another, …
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Partially Covariant Quantum Theory of Gravitation
… the unambiguous interpretation of any proposed quantum theory of gravitation. After a brief review of the current canonicnl methods for quantizing the gravitational field we conclude that they do not guarantee conservation of probability owing to the difficulty of finding a suitable intrinsic …
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Quantum Theory from Principles, Quantum Software from Diagrams
Contains fulltext : 232865.pdf (Publisher’s version ) (Open Access)
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Quantum Theory of Electron Transport Through Photo-Synthetic Porphyrins
… in the theoretical approach; Density Functional Theory, which is implemented in the SIESTA code, and the Green’s function formalism of electron transport (Chapter 2), which is implemented in the GOLLUM code. Both techniques are used extensively to study a family of metallo-porphyrin molecules. In …
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Quantum theory of sensing and thermoelectricity in molecular nanostructures
… approach, which are Density Functional Theory, which is implemented in the SIESTA code [1], and the Green’s function formalism of elctron transport (Chapter 2), which is implemented in the GOLLUM code [2], it is a next-generation code, born out of the non-equilibrium transport code …
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Foundations research in information retrieval inspired by quantum theory
… formalism and physical conceptualizations of quantum theory (QT) are investigated for the purpose of modelling the this abstract search process as a physical process. Techniques for representing a search process by the Hilbert space formalism in QT are presented from which techniques are …
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A type-based framework for higher-order quantum theory
The study of quantum information protocols that process quantum gates has led to an interest in ‘higher-order’ quantum transformations, which are transformations that act on other quantum transformations as inputs and/or return them as outputs. Mathematically, such transformations form an inductive …
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Quantum theory from the perspective of general probabilistic theories
This thesis explores various perspectives on quantum phenomena, and how our understanding of these phenomena is informed by the study of general probabilistic theories. Particular attention is given to quantum nonlocality, and its interaction with areas of physical and mathematical interest such as …
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An Indeterminacy-based Local Approach and Ontology for Quantum Theory
… scientific and philosophical issues with quantum theory (QT). First, I propose Environmental Determinacy-based Quantum Theory (EnDQT) and argue that contrary to the other well-known quantum theories, it has the great benefit of being a local, non-relational, and …
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Theory of large quantal systems and the quantum theory of measurement
The consistency problem of quantum mechanics may be resolved by regarding any measurement performed on an atomic system as essentially involving an interaction between the atomic system and a macroscopic measuring apparatus and the subsequent behaviour of the apparatus in producing a signal to …
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Aspects of quantum theory in 1+1 and slightly more dimensions
We consider four problems in (1+1)-dimensional physics. Each of these problems had important connections to the physical behavior of (3+ 1 )-dimensional systems. First, we consider problem of fermions interacting with multiple bosonic solitons. We describe a new approximation scheme for determining …
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Fluid-phase thermodynamics from molecular-level properties and interactions based in quantum theory
… thermodynamics of macroscopic fluid systems from quantum chemistry and statistical thermodynamics has been developed. This work extends the group-contribution concepts most utilized in chemical engineering. Computational chemistry software is used to define the geometries and electron density …
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