The quantum Rabi model for two qubits

dc.creatorBLAS MANUEL RODRIGUEZ LARA
dc.date2013-07-29
dc.date.accessioned2023-07-25T16:25:09Z
dc.date.available2023-07-25T16:25:09Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2199
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7807379
dc.descriptionWe study a system composed of two nonidentical qubits coupled to a single mode quantum field. We calculate the spectra of the system in the deepstrong-coupling regime via perturbation theory up to second order corrections, and show that it converges to two forced oscillator chains for cases well into that regime. Our predictions are confirmed by numerical calculation of the spectra using a parity decomposition of the corresponding Hilbert space. The numerical results point to two interesting behaviors in the ultra-strong-coupling regime: the rotating wave approximation is valid for some particular cases and there exist crossings in the spectra within each parity subspace. We also present the normal modes of the system and give an example of the time evolution of the mean photon number, population inversion, von Neuman entropy and Wootters concurrence in the ultra-strong- and deep-strongcoupling regimes.
dc.formatapplication/pdf
dc.languageeng
dc.publisherJournal of Physics A: Mathematical and Theoretical
dc.relationcitation:Chilingaryan, S. A., and Rodríguez-Lara, B. M., (2013). The quantum Rabi model for two qubits, Journal of Physics A: Mathematical and Theoretical, Vol. 46(33):1-14
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Qubits
dc.subjectinfo:eu-repo/classification/Inspec/Quantum field
dc.subjectinfo:eu-repo/classification/Inspec/Hilbert space
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/22
dc.subjectinfo:eu-repo/classification/cti/2209
dc.subjectinfo:eu-repo/classification/cti/2209
dc.titleThe quantum Rabi model for two qubits
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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