Control in quantum optomechanical systems
Optomechanical systems are powerful devices both as experiments to answer fundamental questions related with quantum physics as for technological applications. They will enable us to observe the transition between classical and quantum physics, or purely quantum phenomena with objects at mesoscopic...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/1957 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1957 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Inspec/Optomechanics info:eu-repo/classification/Inspec/Quantum info:eu-repo/classification/Inspec/Optics info:eu-repo/classification/Inspec/Control info:eu-repo/classification/Inspec/Phases info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 |
| Sumario: | Optomechanical systems are powerful devices both as experiments to answer fundamental questions related with quantum physics as for technological applications. They will enable us to observe the transition between classical and quantum physics, or purely quantum phenomena with objects at mesoscopic scale. As an example on the fundamental side, it is possible to obtain quantum behaviours of mesoscopic objects, like the quantum ground state of the mechanical oscillator. Regarding technological applications, optomechanical systems can be incorporated on-chip for different uses, like magnetic-free circulators or isolators. In the latter example, the laser's phase is used as control parameter to produce a desired effect on optomechanical arrangements. Then, it is relevant to study optomechanical systems and the way those can be controlled in order to obtain many other interesting behaviours and applications. This thesis deals with driven optomechanical systems. These devices consist of one mechanical oscillator coupled to an electromagnetic field by radiation pressure forces. The results present two techniques to control the optomechanical open dynamics. The first technique produces robust quantum-state transfer between the mechanical and electromagnetic fields. The second is focused in effective optomechanical PT -symmetry regimes. Both techniques use characteristics of the laser. The first one relies on phase modulation of the laser while the second on its power value. The approaches to study the optomechanical open dynamics are based on quantum Langevin equations and master equation in Lindblad form. Because the system is open, part of the analysis is analytical while other results were obtained with numerical simulations. |
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