Enhancement of motional entanglement of cold atoms by pairwise scattering of photons
Rui Guo, Xiaoji Zhou, Xuzong Chen · Physical Review A · 2008
The mechanism of pairwise scattering of photons with cold atoms is investigated. We show that considerable motional correlation can be established between atoms during the scattering process, which can effectively squeeze the scattering spectrum and can be utilized to produce highly entangled atomic wave packet. Under certain conditions, the atomic momentum entanglement can be efficiently enhanced beyond the 1 entanglement bit limit (known as $1\phantom{\rule{0.3em}{0ex}}\mathrm{ebit}$, e.g., a Bell singlet state) with only single-photon scattering and detection.