Dynamical engineering of interactions in qudit ensembles
Quantum Physics
2017-11-08 v1 Mesoscale and Nanoscale Physics
Abstract
We propose and analyze a method to engineer effective interactions in an ensemble of d-level systems (qudits) driven by global control fields. In particular, we present (i) a necessary and sufficient condition under which a given interaction can be turned off (decoupled), (ii) the existence of a universal sequence that decouples any (cancellable) interaction, and (iii) an efficient algorithm to engineer a target Hamiltonian from an initial Hamiltonian (if possible). As examples, we provide a 6-pulse sequence that decouples effective spin-1 dipolar interactions and demonstrate that a spin- 1 Ising chain can be engineered to study transitions among three distinct symmetry protected topological phases.
Keywords
Cite
@article{arxiv.1703.09808,
title = {Dynamical engineering of interactions in qudit ensembles},
author = {Soonwon Choi and Norman Y. Yao and Mikhail D. Lukin},
journal= {arXiv preprint arXiv:1703.09808},
year = {2017}
}
Comments
6+7 pages, 2+2 figures