Spectroscopy of a driven solid-state qubit coupled to a structured environment

Details Spectroscopy of a driven solid-state qubit coupled to a structured environment Spectroscopy of a driven solid-state qubit coupled to a structured environment

2004-12-08

arxiv.org/abs/cond-mat/0412194v2

Eur. Phys. J. B 45, 405 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 5 figures

Scientific paper

10.1140/epjb/e2005-00192-5

We study the asymptotic dynamics of a driven spin-boson system where the environment is formed by a broadened localized mode. Upon exploiting an exact mapping, an equivalent formulation of the problem in terms of a quantum two-state system (qubit) coupled to a harmonic oscillator which is itself Ohmically damped, is found. We calculate the asymptotic population difference of the two states in two complementary parameter regimes. For weak damping and low temperature, a perturbative Floquet-Born-Markovian master equation for the qubit-oscillator system can be solved. We find multi-photon resonances corresponding to transitions in the coupled quantum system and calculate their line-shape analytically. In the complementary parameter regime of strong damping and/or high temperatures, non-perturbative real-time path integral techniques yield analytic results for the resonance line shape. In both regimes, we find very good agreement with exact results obtained from a numerical real-time path-integral approach. Finally, we show for the case of strong detuning between qubit and oscillator that the width of the $n$-photon resonance scales with the $n$-th Bessel function of the driving strength in the weak-damping regime.

Affiliated with

Also associated with

No associations

Rating

Spectroscopy of a driven solid-state qubit coupled to a structured environment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectroscopy of a driven solid-state qubit coupled to a structured environment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopy of a driven solid-state qubit coupled to a structured environment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-169559