Characterization of coherent impurity effects in solid state qubits
Statistical Mechanics
2008-01-28 v2 Mesoscale and Nanoscale Physics
Abstract
We propose a characterisation of the effects of bistable coherent impurities in solid state qubits. We introduce an effective impurity description in terms of a tunable spin-boson environment and solve the dynamics for the qubit coherences. The dominant rate characterizing the asymptotic time limit is identified and signatures of non-Gaussian behavior of the quantum impurity at intermediate times are pointed out. An alternative perspective considering the qubit as a measurement device for the spin-boson impurity is proposed.
Cite
@article{arxiv.0706.1747,
title = {Characterization of coherent impurity effects in solid state qubits},
author = {E. Paladino and M. Sassetti and G. Falci and U. Weiss},
journal= {arXiv preprint arXiv:0706.1747},
year = {2008}
}