Bulashenko, OlegVidrier Villalba, Pol2022-09-132022-09-132022-06https://hdl.handle.net/2445/189003Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2022, Tutor: Oleg BulashenkoIn this work, we study the tunneling of a quantum particle using the instanton method. As a starting point, we consider the double well potential, then we extend the results to a periodic potential and compare them to a particle constrained to a circle. Lastly, we test the non-perturbative approach of the method, and we discuss the coupling through a specific, parameter-dependent, periodic potential5 p.application/pdfengcc-by-nc-nd (c) Vidrier, 2022http://creativecommons.org/licenses/by-nc-nd/3.0/es/Dinàmica d'una partículaEfecte túnelTreballs de fi de grauDynamics of a particleTunneling (Physics)Bachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess