Decoherence of many-spin systems in NMR: From molecular characterization to an environmentally induced quantum dynamical phase transition
| dc.creator | Alvarez, Gonzalo A. | |
| dc.date | 2007-05-15 | |
| dc.date.accessioned | 2026-07-07T08:10:57Z | |
| dc.date.available | 2026-07-07T08:10:57Z | |
| dc.description | The control of open quantum systems has a fundamental relevance for fields ranging from quantum information processing to nanotechnology. Typically, the system whose coherent dynamics one wants to manipulate, interacts with an environment that smoothly degrades its quantum dynamics. Thus, a precise understanding of the inner mechanisms of this process, called "decoherence", is critical to develop strategies to control the quantum dynamics. In this thesis we solved the generalized Liouville-von Neumann quantum master equation to obtain the dynamics of many-spin systems interacting with a spin bath. We also solve the spin dynamics within the Keldysh formalism. Both methods lead to identical solutions and together gave us the possibility to obtain numerous physical predictions that contrast well with Nuclear Magnetic Resonance experiments. We applied these tools for molecular characterizations, development of new numerical methodologies and the control of quantum dynamics in experimental implementations. But, more important, these results contributed to fundamental physical interpretations of how quantum dynamics behaves in open systems. In particular, we found a manifestation of an environmentally induced quantum dynamical phase transition. | |
| dc.description | PhD Thesis, Universidad Nacional de Cordoba, 2007. 147 pages, 45 figures; arXiv admin note: The size of the PDF file apparently causes problems with PDF browser plug-ins. Be sure to instead download and open the PDF in a separate application | |
| dc.identifier | https://arxiv.org/abs/0705.2350 | |
| dc.identifier | http://arxiv.org/abs/0705.2350 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/131975 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Chemical Physics | |
| dc.subject | Quantum Physics | |
| dc.title | Decoherence of many-spin systems in NMR: From molecular characterization to an environmentally induced quantum dynamical phase transition | |
| dc.type | text |