2026-04-28T21:21:33Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/335952025-03-26T19:10:04Zcom_10324_22154com_10324_954com_10324_894col_10324_22155

Losada, Marcelo Fortin, Sebastian Gadella Urquiza, Manuel Holik, Federico 2018-12-20T10:08:05Z 2018-12-20T10:08:05Z 2018 International Journal of Modern Physics A, 2018, Vol. 33, No. 18 http://uvadoc.uva.es/handle/10324/33595 10.1142/S0217751X18501099 We introduce a dynamical evolution operator for dealing with unstable physical process, such as scattering resonances, photon emission, decoherence and particle decay. With that aim, we use the formalism of rigged Hilbert space and represent the time evolution of quantum observables in the Heisenberg picture, in such a way that time evolution is nonunitary. This allows to describe observables that are initially noncommutative, but become commutative after time evolution. In other words, a non-abelian algebra of relevant observables becomes abelian when times goes to infinity. We finally present some relevant examples. eng info:eu-repo/semantics/openAccess Dynamics of algebras in quantum unstable systems info:eu-repo/semantics/article