Dissipation in Lagrangian Formalism

A tétel rövid nézete
dc.contributor.advisorNagy, Sándor
dc.contributor.authorThelge, Yoon Ayanajee Peiris
dc.contributor.departmentDE--Természettudományi és Technológiai Kar--Fizikai Intézet
dc.date.accessioned2023-04-26T12:33:56Z
dc.date.available2023-04-26T12:33:56Z
dc.date.created2023-04-25
dc.description.abstractThis thesis examines dissipative forces in physical systems in both microscopic and quantum level. The system-environment interaction is modeled by assuming that the environment is composed of simple harmonic oscillators and that there is a linear interaction between these oscillators and the system. The classical case is solved by determining the retarded Green’s function, which yields the equation of motion of the system. For quantum dissipation, the Lindblad master equation is used to describe the time evolution of the reduced density matrix of the system, and the propagator is investigated to identify important parameters, including the term of Newton's friction force.
dc.description.correctorLB
dc.description.coursePhysics
dc.description.degreeBSc/BA
dc.format.extent43
dc.identifier.urihttps://hdl.handle.net/2437/350966
dc.language.isoen
dc.rights.accessHozzáférhető a 2022 decemberi felsőoktatási törvénymódosítás értelmében.
dc.subjectDissipation
dc.subjectHarmonic oscillator
dc.subjectCTP propagator
dc.subjectQuantum dissipation
dc.subjectLagrangian formalism
dc.subject.dspaceDEENK Témalista::Fizika::Elméleti fizika
dc.titleDissipation in Lagrangian Formalism
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Theses (Faculty of Science and Technology)