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- W3100811972 abstract "An analytical variational method for the ground state of the biased quantum Rabi model in the ultra-strong coupling regime is presented. This analytical variational method can be obtained by a unitary transformation or alternatively by assuming the form of ground state wave function. The key point of the method is to introduce a variational parameter $lambda$, which can be determined by minimizing the energy functional. Using this method, we calculate physical observables with high accuracy in comparison with the numerical exact one. Our method evidently improves the results from the widely used general rotating-wave approximation (GRWA) in both qualitative and quantitative ways." @default.
- W3100811972 created "2020-11-23" @default.
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- W3100811972 date "2018-05-01" @default.
- W3100811972 modified "2023-09-25" @default.
- W3100811972 title "An analytical variational method for the biased quantum Rabi model in the ultra-strong coupling regime" @default.
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- W3100811972 doi "https://doi.org/10.1088/1674-1056/27/5/054219" @default.
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