Generalized rotating-wave approximation for arbitrarily large coupling |
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Authors: | Irish E K |
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Institution: | School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom. e.irish@qub.ac.uk |
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Abstract: | A generalized version of the rotating-wave approximation for the single-mode spin-boson Hamiltonian is presented. It is shown that performing a simple change of basis prior to eliminating the off-resonant terms results in a significantly more accurate expression for the energy levels of the system. The generalized approximation works for all values of the coupling strength and for a wide range of detuning values, and may find applications in solid-state experiments. |
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