Quantum simulations of localization effects with dipolar interactions
Abstract
Quantum information processing often uses systems with dipolar interactions. We use a nuclear spin-based quantum simulator, to study the spreading of information in such a dipolar-coupled system and how perturbations to the dipolar couplings limit the spreading, leading to localization. In [Phys. Rev. Lett. 104, 230403 (2010)], we found that the system reaches a dynamic equilibrium size, which decreases with the square of the perturbation strength. Here, we study the impact of a disordered Hamiltonian with dipolar 1/r^3 interactions. We show that the expansion of the coherence length of the cluster size of the spins becomes frozen in the presence of large disorder, reminiscent of Anderson localization of non-interacting waves in a disordered potential.
Cite
@article{arxiv.1305.2526,
title = {Quantum simulations of localization effects with dipolar interactions},
author = {Gonzalo A. Alvarez and Robin Kaiser and Dieter Suter},
journal= {arXiv preprint arXiv:1305.2526},
year = {2014}
}
Comments
10 pages, 12 figures