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 11 of 11 for “"Quantum scattering"”.
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Ultracold quantum scattering in the presence of synthetic spin-orbit coupling
<p>Two-body scattering constitutes one of the most fundamental processes in various physical systems ranging from ultracold dilute quantum gases to energetic quark- gluon plasmas. In this dissertation, we study the low-energy atomic collision physics in the presence of synthetic gauge fields, which …
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Ultracold Molecules: The Effect of Electromagnetic Fields
… of He($^1S$)+SO($^3\Sigma^-$). Through detailed quantum scattering calculations, it is then shown that the sympathetic cooling of NH($^3\Sigma^-$) molecules with Mg atoms has a good prospect of success, a first for a neutral molecular system. Detailed quantum scattering calculations are performed …
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Novel techniques for cold/ultracold molecular collisions
… apparatus capable of performing molecular beam scattering experiments at collision energies from well above the room temperature to below 1 K. The novel techniques introduced here offers a platform to study collisions at a regime where the scattering is mainly governed by quantum mechanics. …
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Toward a Rigorous Justification of the Three-Body Impact Parameter Approximation
… (IP) approximation is a semiclassical model in quantum scattering theory wherein N large masses interact with one small mass. We study this model in one spatial dimension using the tools of time-dependent scattering theory, considering a system of two large-mass particles and one small-mass …
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Machine Learning Regularized Solution of the Lippmann-Schwinger Equation
… branches of physics, especially optical and quantum scattering. Solving the equation requires the inversion of a linear operator specified by the scattering potential, which is ill-conditioned. To resolve numerical difficulty originating from such ill-conditionedness, we propose a machine …
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A computational electromagnetic framework for waveguide quantum electrodynamics
… thesis, a framework for cavity and waveguide quantum electrodynamic (CQED, and WQED, respectively) problems is presented. The essence of this framework is to use the dyadic Green's function (DGF) to obtain the local density of states (LDOS) and radiative shift of a two-level system (TLS) …
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Ultracold Rydberg Atoms in Structured and Disordered Environments
… Their lifetimes were estimated using both quantum scattering calculations and semi-classical approximations which are found to be typically sub-microseconds. In the disordered case, the Rydberg-excitation spectra of a frozen-gas were simulated, where the nuclear degrees of freedom can be …
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Quantum Controlled Collisions and Magnetic Trapping of Ultracold NaLi Molecules
… magnetic (2𝜇𝐵) dipole moments and small two-body scattering rate, as predicted by the universal model for cold collision. Additionally, ²³Na⁶Li is the lightest bi-alkali molecule, and the theoretical simulation of collisions is relatively feasible compared to other heavy molecules which makes it a …
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Searches for New Physics at the Large Hadron Collider
… literature. In the third study the level of quantum scattering interference between signal and background of the process pp → t¯bH− followed by H− → b¯t (and conjugate process) and the irreducible backgrounds with final state pp → t¯tb¯b is investigated. It is found that in some areas of the …
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Topics in Electromagnetic, Acoustic, and Potential Scattering Theory
… and invisibility, the topic of time-independent scattering theory in quantum mechanics is becoming a useful field to re-examine in the above contexts. One of the key areas of electromagnetic theory scattering of plane electromagnetic waves — is based on the properties of the refractive indices in …