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Séminaire interne LPMMC

Kirill Dubovitskii
Second-order perturbation theory for dissipative cat qubits
le mercredi 20 mars 2024 à 11:00
Lieu : G421

Personne à contacter : Vincent Rossetto ()

Dissipative cat qubits have attracted a lot of interest in the recent years. Their main feature is that their unperturbed dynamics is described by a Lindbladian, not a Hamiltonian. This complicates the analysis of the noise effects on them. In this paper we develop perturbation theory on top of the dissipative cat qubit Lindbladian and evaluate the qubit relaxation rate due to the single photon loss up to the second-order in the perturbation strength. We analytically show that the second-order contribution to the slowest decay rate can become parametrically larger than the first-order contribution. Also, we analyze the detuning perturbation up to the second-order using the same procedure.