Coupling strength estimation for spin chains despite restricted access
Quantum Physics
2009-03-13 v2
Abstract
Quantum control requires full knowledge of the system many-body Hamiltonian. In many cases this information is not directly available due to restricted access to the system. Here we show how to indirectly estimate all the coupling strengths in a spin chain by measuring one spin at the end of the chain. We also discuss the efficiency of this "quantum inverse problem" and give a numerical example.
Cite
@article{arxiv.0810.2866,
title = {Coupling strength estimation for spin chains despite restricted access},
author = {Daniel Burgarth and Koji Maruyama and Franco Nori},
journal= {arXiv preprint arXiv:0810.2866},
year = {2009}
}
Comments
improved version with additional reference