Control of mixed-state quantum systems by a train of short pulses
Quantum Physics
2007-05-23 v1
Abstract
A density matrix approach is developped for the control of a mixed-state quantum system using a time-dependent external field such as a train of pulses. This leads to the definition of a target density matrix constructed in a reduced Hilbert space as a specific combination of the eigenvectors of a given observable through weighting factors related with the initial statistics of the system. A train of pulses is considered as a possible strategy to reach this target. An illustration is given by considering the laser control of molecular alignment / orientation in thermal equilibrium.
Cite
@article{arxiv.quant-ph/0510114,
title = {Control of mixed-state quantum systems by a train of short pulses},
author = {D. Sugny and A. Keller and O. Atabek and D. Daems and C. M. Dion and S. Guérin and H. R. Jauslin},
journal= {arXiv preprint arXiv:quant-ph/0510114},
year = {2007}
}
Comments
10 pages, 8 figures