Weak measurements with orbital angular momentum pointer states
Abstract
Weak measurements are a unique tool for accessing information about weakly interacting quantum systems with minimal back action. Joint weak measurements of single-particle operators with pointer states characterized by a two-dimensional Gaussian distribution can provide, in turn, key information about quantum correlations which can be of relevance for quantum information applications. Here we demonstrate that by employing two-dimensional pointer states endowed with orbital angular momentum (OAM), it is possible to extract weak values of the higher order moments of single-particle operators, an inaccessible quantity with Gaussian pointer states only. We provide a specific example that illustrates the advantages of our method both, in terms of signal enhancement, and information retrieval.
Cite
@article{arxiv.1204.3544,
title = {Weak measurements with orbital angular momentum pointer states},
author = {G. Puentes and N. Hermosa and J. P. Torres},
journal= {arXiv preprint arXiv:1204.3544},
year = {2012}
}
Comments
5 pages, accepted for publication in Phys. Rev. Lett