Quantum Measurements of Coupled Two-Level Systems
Quantum Physics
2009-03-05 v1 Mesoscale and Nanoscale Physics
Abstract
We propose an approach to measuring nonresonant coupled systems, which gives a parametrically smaller error than the conventional fast projective measurements. The approach takes into account that, due to the coupling, excitations are not entirely localized on individual systems. It combines high spectral selectivity of the detector with temporal resolution and uses the ideas of the quantum diffusion theory. The results bear on quantum computing with perpetually coupled qubits.
Cite
@article{arxiv.0903.0012,
title = {Quantum Measurements of Coupled Two-Level Systems},
author = {L. Fedichkin and M. Shapiro and M. I. Dykman},
journal= {arXiv preprint arXiv:0903.0012},
year = {2009}
}