A feasible setup of continuous-variable (CV) quantum non-demolishing (QND) interaction at a distance is proposed. If two distant experimentalists are able to locally perform identical QND interactions then the proposed realization requires only a single quantum channel and classical communication between them. A possible implementation of the proposed setup in recent quantum optical laboratories is discussed and an influence of Gaussian noise in the quantum channel on a quality of the implementation is analyzed. An efficient realization of the QND interaction at a distance can be a basic step to possible distributed quantum CV experiments between the distant laboratories.
Cite
@article{arxiv.quant-ph/0404010,
title = {Continuous-variable quantum non-demolishing interaction at a distance},
author = {Radim Filip},
journal= {arXiv preprint arXiv:quant-ph/0404010},
year = {2009}
}