We study the dynamics of a symmetric two-level system strongly coupled to a broadened harmonic mode. Upon mapping the problem on to a spin–boson model with peaked spectral density, we show how analytic solutions can be obtained, at arbitrary detuning and finite temperatures, in the case of large Q-factors of the oscillator. One, two or more dominating oscillation frequencies of the two-level particle can be observed as a consequence of the entanglement with the oscillator. Our approximated analytical solution agrees well with numerical predictions obtained within the non-interacting blip approximation.
|Titolo:||Dynamics of a qubit coupled to a broadened harmonic mode at finite detuning|
|Data di pubblicazione:||2007|
|Citazione:||Dynamics of a qubit coupled to a broadened harmonic mode at finite detuning / F. NESI; M. GRIFONI; E. PALADINO. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - 9(2007), pp. 316-334.|
|Appare nelle tipologie:||1.1 Articolo in rivista|