Adiabatic approximation in the ultrastrong-coupling regime of a system consisting of an oscillator and two qubits

Abstract

We present a system composed of two flux qubits and a transmission-line resonator. Instead of using the rotating wave approximation (RWA), we analyse the system by the adiabatical approximation methods under two opposite extreme conditions. Basic properties of the system are calculated and compared under these two different conditions. Energy-level spectrum of the system in the adiabatical displaced oscillator basis is shown, and the theoretical result is compared with the numerical solution.

13pages,4 figures

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Cited by in corpus (4)

• Quantum coherence, correlations and nonclassical states in the two-qubit Rabi model with parametric oscillator
• Adiabatic approximation for three qubits ultrastrongly coupled to a harmonic oscillator
• Partial Decoherence and Thermalization through Time-Domain Ergodicity
• Evolution of the entanglement of the $N00N$-type of states in a coupled two cavity system via an adiabatic approximation