Generalization of short coherent control pulses: extension to arbitrary rotations
Quantum Physics
2008-07-09 v2 Strongly Correlated Electrons
Abstract
We generalize the problem of the coherent control of small quantum systems to the case where the quantum bit (qubit) is subject to a fully general rotation. Following the ideas developed in Pasini et al (2008 Phys. Rev. A 77, 032315), the systematic expansion in the shortness of the pulse is extended to the case where the pulse acts on the qubit as a general rotation around an axis of rotation varying in time. The leading and the next-leading corrections are computed. For certain pulses we prove that the general rotation does not improve on the simpler rotation with fixed axis.
Cite
@article{arxiv.0805.4726,
title = {Generalization of short coherent control pulses: extension to arbitrary rotations},
author = {S. Pasini and G. S. Uhrig},
journal= {arXiv preprint arXiv:0805.4726},
year = {2008}
}
Comments
6 pages, no figures; published version