Arbitrarily Large Continuous-Variable Cluster States from a Single Quantum Nondemolition Gate

TL;DR

This paper introduces a compact method to generate large continuous-variable cluster states using a single squeezer and quantum nondemolition gate, enabling scalable quantum computation with minimal resources.

Contribution

It demonstrates a novel experimental design that produces arbitrarily large cluster states with a single squeezer and QND gate, allowing for scalable quantum computing.

Findings

Enables generation of arbitrarily large cluster states

Supports simultaneous state generation and computation

Reduces coherence and stability requirements

Abstract

We present a compact experimental design for producing an arbitrarily large optical continuous-variable cluster state using just one single-mode vacuum squeezer and one quantum nondemolition gate. Generating the cluster state and computing with it happen simultaneously: more entangled modes become available as previous modes are measured, thereby making finite the requirements for coherence and stability even as the computation length increases indefinitely.