Universal quantum computing with measurement-induced continuous-variable gate sequence in a loop-based architecture

Authors

Shuntaro Takeda and Akira Furusawa

Abstract

We propose a scalable scheme for optical quantum computing using measurement-induced continuous-variable quantum gates in a loop-based architecture. Here, time-bin-encoded quantum information in a single spatial mode is deterministically processed in a nested loop by an electrically programmable gate sequence. This architecture can process any input state and an arbitrary number of modes with almost minimum resources, and offers a universal gate set for both qubits and continuous variables. Furthermore, quantum computing can be performed fault tolerantly by a known scheme for encoding a qubit in an infinite-dimensional Hilbert space of a single light mode.

 Physical Review Letters：https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.120504