Resumen
We study the decoherence of a superconducting qubit due to the dispersive coupling to a damped harmonic oscillator. We go beyond the weak qubit-oscillator coupling, which we associate with a phase Purcell effect, and enter into a strong coupling regime, with qualitatively different behavior of the dephasing rate. We identify and give a physicaly intuitive discussion of both decoherence mechanisms. Our results can be applied, with small adaptations, to a large variety of other physical systems, e.g. trapped ions and cavity QED, boosting theoretical and experimental decoherence studies. © Europhysics Letters Association.
Idioma original | Español |
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Publicación | EPL |
Volumen | 80 |
Estado | Publicada - 1 nov. 2007 |
Publicado de forma externa | Sí |