Spatiotemporal graph states from a single optical parametric oscillator
Rongguo Yang, Jing Zhang, Israel Klich, Carlos González-Arciniegas, Olivier Pfister · Physical Review A · 2020
An experimental scheme is proposed for building massively multipartite entangled states using both the spatial and the frequency modes of an optical parametric oscillator. We provide analytical forms of the entangled states using the squeezed eigenmodes of Heisenberg equations, also known as the nullifiers of the corresponding graph state. This scheme can generate, in parallel, several cluster states described by sparsely connected, bicolorable graphs, usable for one-way quantum computing.