Instanton approach to the decay of a metastable quantum state

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dc.contributor.advisorBulashenko, Oleg
dc.contributor.authorAlsina Bolívar, Pol
dc.date.accessioned2021-10-14T14:14:59Z
dc.date.available2021-10-14T14:14:59Z
dc.date.issued2021-07
dc.descriptionTreballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2021, Tutor: Oleg Bulashenkoca
dc.description.abstractThe escape transition due to quantum tunnelling of a particle from a metastable region, created by a cubic potential, is studied. Finding this amplitude is reduced to the computation of a Feynman path integral. This calculus has been carried out using the instanton method, which demands to rotate the time coordinate along the imaginary plane. The results obtained show that the ground state energy has actually an imaginary part (fact that is actually related to the metastability of the system) and allows to find the decaying rate of the metastable stateca
dc.format.extent5 p.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2445/180590
dc.language.isoengca
dc.rightscc-by-nc-nd (c) Alsina, 2021
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.sourceTreballs Finals de Grau (TFG) - Física
dc.subject.classificationEfecte túnelcat
dc.subject.classificationEstat quànticcat
dc.subject.classificationTreballs de fi de graucat
dc.subject.otherTunneling (Physics)eng
dc.subject.otherQuantum stateeng
dc.subject.otherBachelor's theseseng
dc.titleInstanton approach to the decay of a metastable quantum stateeng
dc.typeinfo:eu-repo/semantics/bachelorThesisca

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