Generalized rotating-wave approximation for the two-qubit quantum Rabi model
作者： Yu-Yu Zhang , Qing-Hu Chen
DOI: 10.1103/PHYSREVA.91.013814
关键词: Hamiltonian (quantum mechanics) 、 Qubit 、 Quantum 、 Quantum electrodynamics 、 Population inversion 、 Adiabatic process 、 Cavity quantum electrodynamics 、 Physics 、 Eigenvalues and eigenvectors 、 Rotating wave approximation 、 Quantum mechanics
摘要: The generalized rotating-wave approximation (GRWA) is presented for the two-qubit and cavity coipling system . analytical expressions in zeroth order recover previous adiabatic ones. counterrotating-wave terms can be eliminated by performing first corrections. An effective solvable Hamiltonian with same form as ordinary RWA one are then obtained, giving a significantly accurate eigenvalues eigenstates. Energy levels present GRWA accordant numerical exact diagonalization ones wide range of coupling strength. atomic population inversion quantitative agreement results different detunings ultrastrong regime.
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