Generation of cluster states

TLDR

The required facilities are well within current technology. The study proposes two schemes for generating cluster states. One scheme uses cavity QED with resonant atom–cavity interactions, considering cavity decay and atomic spontaneous emission, while the other employs atomic ensembles. The cavity QED scheme achieves very short interaction times to mitigate decoherence, and the ensemble scheme offers inherent fault tolerance and robustness to realistic noise.

Abstract

We propose two schemes for the generation of cluster states. One is based on cavity quantum electrodynamics (QED) techniques. The scheme only requires resonant interactions between two atoms and a single-mode cavity. The interaction time is very short, which is important in view of decoherence. Furthermore, we also discuss the cavity decay and atomic spontaneous emission case. The other is based on atomic ensembles. The scheme has an inherent fault tolerance function and is robust to realistic noise and imperfections. All the facilities used in our schemes are well within the current technology.