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Title: Instanton approach to the decay of a metastable quantum state
Author: Alsina Bolívar, Pol
Director/Tutor: Bulashenko, Oleg
Keywords: Efecte túnel
Estat quàntic
Treballs de fi de grau
Tunneling (Physics)
Quantum state
Bachelor's thesis
Issue Date: Jul-2021
Abstract: The 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 state
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2021, Tutor: Oleg Bulashenko
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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