Theoretical study of Photon-Assisted Tunneling of Ultracold Atoms in a Triple-well Potential

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dc.catalogadoryvc
dc.contributor.advisorMorales Molina, Luis Yansi
dc.contributor.authorAguilera Valdés, Emilio Enrique
dc.contributor.otherPontificia Universidad Católica de Chile. Instituto de Física
dc.date.accessioned2025-02-24T16:56:27Z
dc.date.available2025-02-24T16:56:27Z
dc.date.issued2024
dc.date.updated2025-01-29T18:41:23Z
dc.descriptionTesis (Master’s degree in Physics)--Pontificia Universidad Católica de Chile, 2024
dc.description.abstractThe thesis studies Photon-Assisted Tunneling (PAT) in a system of ultracold atoms in a triple-well potential, utilizing Bose-Hubbard and Gross-Pitaevskii models. Simulations reveal that an ac-driving field influence tunneling dynamics, enabling quantum self-trapping and PAT. The study extends to open quantum systems, analyzing PT-symmetric setups with balanced gain and loss, showcasing PAT’s role in quantum control and potential applications in ultracold atom systems and quantum optics.
dc.description.abstractIn this thesis, we theoretically investigate the tunneling dynamics of a Bose-Einstein condensate confined in a triple-well potential (TWP), in the presence of an ac-driving. We focus the analysis on the phenomenon of Photon Assisted Tunneling (PAT), that take place between the non-central wells of the TWP. PAT is a resonant process, originally studied in condensed matter physics in which periodic driving fields are implemented to control the transport of particles. We explore this phenomenon modeling both noninteracting and interacting regimes through a the Bose-Hubbard model and the Gross-Pitaevskii equation. Numerical simulations demonstrate how varying the amplitude and frequency of the driving field may drastically change the tunneling of atoms, either assisting or suppressing the tunneling. This leads to coherent population oscillations and regimes of quantum self-trapping. Very importantly, we show that PAT can enhance atomic tunneling under specific driving frequencies, resulting in tunneling rates well above the otherwise non-driven case. Additionally, our study extends the analysis to open quantum systems with a TWP with balanced gain and loss, which exhibits PT-symmetry. We investigate how PAT enlarges the region of the parameter space with real spectrum. The results provide insights into quantum control strategies and shed light on potential applications in the fields of ultracold atoms and quantum optics.
dc.fechaingreso.objetodigital2025-01-29
dc.format.extent58 páginas
dc.fuente.origenAutoarchivo
dc.identifier.doi10.7764/tesisUC/FIS/102216
dc.identifier.urihttps://doi.org/10.7764/tesisUC/FIS/102216
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/102216
dc.information.autorucInstituto de Física; Aguilera Valdés, Emilio Enrique; S/I; 1064538
dc.information.autorucInstituto de Física; Morales Molina, Luis Yansi; S/I; 1007841
dc.language.isoen
dc.nota.accesocontenido completo
dc.rightsacceso abierto
dc.rights.licenseAtribución-NoComercial 4.0 Internacional (CC BY-NC 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/deed.es
dc.subject.ddc510
dc.subject.deweyMatemática física y químicaes_ES
dc.titleTheoretical study of Photon-Assisted Tunneling of Ultracold Atoms in a Triple-well Potential
dc.typetesis de maestría
sipa.codpersvinculados1064538
sipa.codpersvinculados1007841
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