Comment on 'Initial states of qubit-environment models leading to conserved quantities'
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AbstractRecently, Gardas and Dajka (2013 J. Phys. A: Math. Theor. 46 235301) proposed a theoretical scheme on how to prepare a proper initial state of a composite qubit-boson system which could assure no energy exchange between the two subsystems. For illustration, they applied the proposed scheme to both the Jaynes-Cummings model and the multi-photon Rabi model. However, it has already been rigorously proven that the k-photon Rabi model for k > 2 does not have eigenstates in the Hilbert space spanned by the eigenstates of the corresponding k-photon Jaynes-Cummings model and that the two-photon Rabi model has a discrete eigenenergy spectrum with normalizable eigenstates only if the coupling strength is smaller than a critical value. Hence, the proposed theoretical scheme is not applicable to the multi-photon Rabi model.
All Author(s) ListLo CF
Journal nameJournal of Physics A: Mathematical and Theoretical
Volume Number47
Issue Number16
PublisherIOP Publishing: Hybrid Open Access
LanguagesEnglish-United Kingdom
KeywordsJaynes-Cummings model; multi-photon Rabi model; qubit-boson system
Web of Science Subject CategoriesPhysics; Physics, Mathematical; PHYSICS, MATHEMATICAL; Physics, Multidisciplinary; PHYSICS, MULTIDISCIPLINARY

Last updated on 2018-21-01 at 20:55