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Y.-C. Chang Wei, Liqiang 2015-09-25T22:14:30Z 2015-09-25T22:14:30Z 10000-01-01 1998 1998 We present accurate results for the dynamics of an initially localized two-level (TLS) system coupled to a generic dissipative environment and driven by a periodic force which in the semiclassical limit is equivalent to a continuous-wave electromagnetic field. The time evolution is calculated via iterative evaluation of the path integral. We show that in the case where the temperature of the environment is high with respect to the energy splitting of the tunneling doublet, the delocalization rate is largely independent of the friction of the environment and of the specifics of the driving force, depending only on its overall strength. This robust behavior implies that localized states can be stabilized in these systems without much finetuning of external conditions. Our numerical results are interpreted in light of non-adiabatic rate theory. Made available in DSpace on 2015-09-25T22:14:30Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9921751.pdf: 6073192 bytes, checksum: b96f7fae564996d95774dc344b6d61ed (MD5) Previous issue date: 1998 Embargo set by: Seth Robbins for item 85721 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 170 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998. http://hdl.handle.net/2142/84440 (MiAaPQ)AAI9921751 eng Physics, Elementary Particles and High Energy First-Principles Study of Electronic Structure and Optical Properties of Semiconductor Surfaces Unified Approach for Exact Calculation of Coupling Coefficients of Quantum Angular Momenta text Chemistry Chemistry University of Illinois at Urbana-Champaign Dissertation Ph.D.