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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Spectral classification of coupling regimes in the quantum Rabi model

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Autor(es):
Rossatto, Daniel Z. ; Villas-Boas, Celso J. ; Sanz, Mikel ; Solano, Enrique
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 96, n. 1 JUL 24 2017.
Citações Web of Science: 26
Resumo

The quantum Rabi model is in the scientific spotlight due to the recent theoretical and experimental progress. Nevertheless, a full-fledged classification of its coupling regimes remains as a relevant open question. We propose a spectral classification dividing the coupling regimes into three regions based on the validity of perturbative criteria on the quantum Rabi model, which allows us the use of exactly solvable effective Hamiltonians. These coupling regimes are (i) the perturbative ultrastrong coupling regime which comprises the Jaynes-Cummings model, (ii) a region where nonperturbative ultrastrong and nonperturbative deep strong coupling regimes coexist, and (iii) the perturbative deep strong coupling regime. We show that this spectral classification depends not only on the ratio between the coupling strength and the natural frequencies of the unperturbed parts, but also on the energy to which the system can access. These regimes additionally discriminate the completely different behaviors of several static physical properties, namely the total number of excitations, the photon statistics of the field, and the cavity-qubit entanglement. Finally, we explain the dynamical properties which are traditionally associated with the deep strong coupling regime, such as the collapses and revivals of the state population, in the frame of the proposed spectral classification. (AU)

Processo FAPESP: 13/04162-5 - Desenvolvimento de sensores quânticos com átomos ultrafrios
Beneficiário:Philippe Wilhelm Courteille
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 13/23512-7 - Eletrodinâmica quântica de circuitos: biestabilidade e estados comprimidos
Beneficiário:Daniel Zini Rossatto
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 14/24576-1 - Regimes de acoplamento ultraforte e extremamente forte em eletrodinâmica quântica de circuitos
Beneficiário:Daniel Zini Rossatto
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado