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 179 for “"Quantum physics"”.
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Quantum Physics of Photosynthetic Light -Harvesting
… reaction center. This thesis presents a quantum-mechanical description of the light harvesting process in the PSU, based on the atomic level model. Excitation transfer rates for various excitation transfer steps have been determined through Fermi's golden rule. To describe electronic …
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Computational Studies in Chemical Quantum Physics
Two stochastic dynamic models are used to study several aspects of curve crossing phenomena in dissipative systems. A surface hopping model is used to test the qualitative predictions of earlier theories. The simulation results agree well with the qualitative picture. Results are obtained for an …
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Quantum physics of photosynthetic light-harvesting
… reaction center. This thesis presents a quantum-mechanical description of the light harvesting process in the PSU, based on the atomic level model. Excitation transfer rates for various excitation transfer steps have been determined through Fermi's golden rule. To describe electronic …
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Investigating the foundations of quantum physics with optomechanical setups
The extraordinary success of quantum mechanics and its formalism has been established thanks to countless experiments with microscopic systems. Nevertheless, it is still not clear whether and when the quantum world ends, allowing for the emergence of classical phenomena. The extension of quantum …
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Exploring Novel Quantum Physics Using Ytterbium-171 in An Optical Cavity
… thesis, I present the development of a cavity quantum electrodynamics (CQED) system using single or multiple ensembles of ytterbium-171 atoms and its use for quantum metrology and quantum information science investigations. We develop and study a unified theoretical framework that describes …
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Investigating and Improving Student Understanding of Superposition in Introductory and Quantum Physics Courses
… in introductory optics and upper-division quantum mechanics courses. The focus is on the extent to which students are able to relate the mathematical formalism used in physics to real-world phenomena. In particular, the investigation involves three topics: (1) student ability to determine …
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Topics in quantum physics: Schrodinger's cat problem - time measurement accuracies in quantum mechanics
In this thesis I address two different topics in quantum theory. The first one is the long discussed Schrodinger's cat problem, and the issues related to having a macroscopic superposition state. I show that the quantum theory provides full explanation to the problem. In the second part, I discuss …
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The Copenhagen interpretation of quantum physics: An assessment of its fitness for use in Christian theology and apologetics
… suitability of the Copenhagen interpretation of quantum physics for use in Christian theological and apologetic endeavors. Chapter 1 introduces basic issues in quantum physics in non-technical language and defines the basic position of the Copenhagen interpretation. Chapter 2 gives a thorough …
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Introducing a Kantian interpretation of quantum physics : in accordance with Kant's philosophy of science in the Critique of the power of judgment, reinterpreted and reworked with special attention to the supersensible realm
… I confront the problem of indeterminism in quantum physics. The first pioneers accepted indeterminism as part of their Copenhagen interpretation and it was incorporated in Von Neumann's formulation (as the "projection postulate"). But how deep does this indeterminism go? With the arrival of …
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A Novel Multiple Access Quantum Key Distribution Network for Secure Communication. An Investigation into The Use of Laws of Quantum Physics And Communication Protocols To Enable Multiple Clients To Exchange Quantum Keys In A Lan Environment For Secure Communication
… and government agencies are trying to build quantum computers to solve some complex problems. These problems include prime factorisation of large numbers, a critical factor in the field of cryptography. Quantum computers are much more potent because of their nature. It processes information …
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3+1 Dimensions
… come from the larger scientific discipline of Quantum Mechanics. Connections are also made from the personal psychological perspectives of people and events that have had some impact on me personally. The paper will also discuss the sculptures individually and their connection to quantum …
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A psychophysical investigation of quantum cognition: An interdisciplinary synthesis
Quantum cognition is an interdisciplinary emerging field within the cognitive sciences which applies various axioms of quantum mechanics to cognitive processes. This thesis reports the results of several empirical investigations which focus on the applicability of quantum cognition to …
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Schema.
… and prints as installation as they relate to quantum physics and universal scale. Subjects discussed, on a project-by-project basis, include thought, ideas, methods, influences, and process by which the work in the exhibition was achieved.</p>
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Combinatorial algorithms for perturbation theory and application on quantum computing
<p>Quantum computing is an emerging area between computer science and physics. Numerous problems in quantum computing involve quantum many-body interactions. This dissertation concerns the problem of simulating arbitrary quantum many-body interactions using realistic two-body interactions. To …
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DEPLOYED QUANTUM KEY DISTRIBUTION WITH A ROOM-TEMPERATURE TELECOM SINGLE PHOTON SOURCE
Quantum key distribution (QKD) allows distant users to communicate with perfect secrecy based on the principles of quantum physics. Practical QKD in deployed fibers serves as an important part of the future quantum networks. Although Weak Coherent Pulses have achieved impressive key rates as QKD …
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Chaos Criminology: A Critical Inquiry
… from a Newtonian-based ontology to one of quantum physics. Primarily this effort has taken the form of integrating Chaos Theory into Criminology into what this thesis calls ‘Chaos Criminology’. However, with the melding of any two fields, terms and concepts need to be translated properly, …
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Diversity-inducing probability measures for machine learning
… Point Process (DPP). DPPs originally arose in quantum physics, and are known to have deep relations to linear algebra, combinatorics, and geometry. We explore applications of DPPs to kernel matrix approximation and kernel ridge regression.
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Poetry as a Pedagogy of Touch
… in theory and technology, especially quantum physics and post-structuralism, have redefined representation to encompass the necessary reflex of the representer. To be sure, my research has also found feminist and postcolonial criticisms to echo this theory: both have sought to …
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Development of provably stable A-phi formulation time domain integral equations
Applications involving quantum physics are becoming an increasingly important area for electromagnetic engineering. To address practical problems in these emerging areas, appropriate numerical techniques must be utilized. However, the unique needs of many of these applications require the …
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