Phonon-induced decoherence and dissipation in donor-based charge qubits

Details Phonon-induced decoherence and dissipation in donor-based charge qubits Phonon-induced decoherence and dissipation in donor-based charge qubits

2006-09-07

arxiv.org/abs/cond-mat/0609164v1

Eur. Phys. J. B 53, 91-98 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures, published online in Eur.Phys.J.B, article in press; the original publication is avaiable at www.eurphysj.o

Scientific paper

10.1140/epjb/e2006-00346-y

We investigate the phonon-induced decoherence and dissipation in a donor-based charge quantum bit realized by the orbital states of an electron shared by two dopant ions which are implanted in a silicon host crystal. The dopant ions are taken from the group-V elements Bi, As, P, Sb. The excess electron is coupled to deformation potential acoustic phonons which dominate in the Si host. The particular geometry tailors a non-monotonous frequency distribution of the phonon modes. We determine the exact qubit dynamics under the influence of the phonons by employing the numerically exact quasi-adiabatic propagator path integral scheme thereby taking into account all bath-induced correlations. In particular, we have improved the scheme by completely eliminating the Trotter discretization error by a Hirsch-Fye extrapolation. By comparing the exact results to those of a Born-Markov approximation we find that the latter yields appropriate estimates for the decoherence and relaxation rates. However, noticeable quantitative corrections due to non-Markovian contributions appear.

Affiliated with

Also associated with

No associations

Rating

Phonon-induced decoherence and dissipation in donor-based charge qubits 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 Phonon-induced decoherence and dissipation in donor-based charge qubits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phonon-induced decoherence and dissipation in donor-based charge qubits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-317558