Photonic fusion of entangled resource states from a quantum emitter

TL;DR

This paper demonstrates a method for scalable photonic quantum computing by deterministically fusing entangled states generated from a solid-state spin-photon interface, enabling efficient temporal multiplexing of entanglement.

Contribution

It introduces a novel approach to fuse resource states deterministically from a solid-state quantum emitter, advancing photonic quantum computing capabilities.

Findings

Successful deterministic fusion of entangled resource states

Temporal multiplexing creates entanglement between states at different times

Resource-efficient scaling of many-body photonic entangled systems

Abstract

Fusion-based photonic quantum computing architectures rely on two primitives: i) near-deterministic generation and control of constant-size entangled states and ii) probabilistic entangling measurements (photonic fusion gates) between entangled states. Here, we demonstrate these key functionalities by fusing resource states deterministically generated using a solid-state spin-photon interface. Repetitive operation of the source leads to sequential entanglement generation, whereby curiously entanglement is created between the quantum states of the same spin at two different instances in time. Such temporal multiplexing of photonic entanglement provides a resource-efficient route to scaling many-body entangled systems with photons.