We propose a scheme to create a macroscopic ``Sch\"odinger cat'' state formed by two interacting Bose condensates. In analogy with quantum optics, where the control and engineering of quantum states can be maintained to a large extend, we consider the present scheme to be an example of quantum atom optics at work.
@article{arxiv.quant-ph/9706034,
title = {Quantum Superposition States of Bose-Einstein Condensates},
author = {J. I. Cirac and M. Lewenstein and K. Moelmer and P. Zoller},
journal= {arXiv preprint arXiv:quant-ph/9706034},
year = {2009}
}