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

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

2012-03-02

arxiv.org/abs/1203.0423v1

Physics

Quantum Physics

13pages,4 figures

Scientific paper

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.

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