Flexible quantum circuits using scalable continuous-variable cluster states

TL;DR

This paper demonstrates that scalable continuous-variable cluster states with a macronode structure enable more flexible and compact measurement-based quantum computation compared to standard lattice states, due to additional measurement degrees of freedom.

Contribution

The work introduces a macronode-based approach to CV cluster states, enhancing quantum circuit flexibility and robustness over traditional lattice-based protocols.

Findings

Enhanced quantum circuit flexibility using macronode structure

More robust quantum information processing

Scalable CV cluster states outperform standard lattice states

Abstract

We show that measurement-based quantum computation on scalable continuous-variable (CV) cluster states admits more quantum-circuit flexibility and compactness than similar protocols for standard square-lattice CV cluster states. This advantage is a direct result of the macronode structure of these states---that is, a lattice structure in which each graph node actually consists of several physical modes. These extra modes provide additional measurement degrees of freedom at each graph location, which can be used to manipulate the flow and processing of quantum information more robustly and with additional flexibility that is not available on an ordinary lattice.