Building a large-scale quantum computer with continuous-variable optical technologies

TL;DR

This paper reviews recent advances in large-scale quantum computing using continuous-variable optical systems, emphasizing scalable technologies, error correction, and experimental progress for practical implementation.

Contribution

It provides a comprehensive overview of recent experimental and theoretical developments in optical continuous-variable quantum computation, highlighting scalable methods and error correction schemes.

Findings

Progress in time multiplexing and integrated optics for scalability

Development of hardware-efficient bosonic quantum error correction

Experimental demonstrations of large-scale optical quantum computation

Abstract

Realizing a large-scale quantum computer requires hardware platforms that can simultaneously achieve universality, scalability, and fault tolerance. As a viable pathway to meeting these requirements, quantum computation based on continuous-variable optical systems has recently gained more attention due to its unique advantages and approaches. This review introduces several topics of recent experimental and theoretical progress in the optical continuous-variable quantum computation that we believe are promising. In particular, we focus on scaling-up technologies enabled by time multiplexing, bandwidth broadening, and integrated optics, as well as hardware-efficient and robust bosonic quantum error correction schemes.