Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System

Abstract

Efficient interfaces between photons and quantum emitters form the basis for quantum networks and enable nonlinear optical devices operating at the single-photon level. We demonstrate an integrated platform for scalable quantum nanophotonics based on silicon-vacancy (SiV) color centers coupled to nanoscale diamond devices. By placing SiV centers inside diamond photonic crystal cavities, we realize a quantum-optical switch controlled by a single color center. We control the switch using SiV metastable orbital states and verify optical switching at the single-photon level by using photon correlation measurements. We use Raman transitions to realize a single-photon source with a tunable frequency and bandwidth in a diamond waveguide. Finally, we create entanglement between two SiV centers by detecting indistinguishable Raman photons emitted into a single waveguide. Entanglement is verified using a novel superradiant feature observed in photon correlation measurements, paving the way for the realization of quantum networks.

15 pages and 5 figures. Supplementary Material, 36 pages and 10 figures, available as an ancillary file

References in corpus (10)

• The Quantum Internet
• Nanophotonic quantum phase switch with a single atom
• Indistinguishable photons from separated silicon-vacancy centers in diamond
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• All-optical initialization, readout, and coherent preparation of single silicon-vacancy spins in diamond
• High-Q optical nanocavities in bulk single-crystal diamond
• Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
• Electron-phonon processes of the silicon-vacancy centre in diamond
• All-optical formation of coherent dark states of silicon-vacancy spins in diamond
• Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond

Cited by in corpus (5)

• Cooperative resonances in light scattering from two-dimensional atomic arrays
• Cavity-enhanced single photon source based on the silicon vacancy center in diamond
• Coherent control of a strongly driven silicon vacancy optical transition in diamond
• Cooperative light scattering in any dimension
• A Tunable Waveguide-Coupled Cavity Design for Efficient Spin-Photon Interfaces in Photonic Integrated Circuits