Experimental Generation of Spin-Photon Entanglement in Silicon Carbide

Abstract

A solid-state approach for quantum networks is advantages, as it allows the integration of nanophotonics to enhance the photon emission and the utilization of weakly coupled nuclear spins for long-lived storage. Silicon carbide, specifically point defects within it, shows great promise in this regard due to the easy of availability and well-established nanofabrication techniques. Despite of remarkable progresses made, achieving spin-photon entanglement remains a crucial aspect to be realized. In this paper, we experimentally generate entanglement between a silicon vacancy defect in silicon carbide and a scattered single photon in the zero-phonon line. The spin state is measured by detecting photons scattered in the phonon sideband. The photonic qubit is encoded in the time-bin degree-of-freedom and measured using an unbalanced Mach-Zehnder interferometer. Photonic correlations not only reveal the quality of the entanglement but also verify the deterministic nature of the entanglement creation process. By harnessing two pairs of such spin-photon entanglement, it becomes straightforward to entangle remote quantum nodes at long distance.

arXiv comment8 pages in total, 4 figures in the main text, 1 figure in the supplemental material

References in corpus (27)

• The Quantum Internet
• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Entanglement detection
• Interfacing single photons and single quantum dots with photonic nanostructures
• Multi-photon entanglement and interferometry
• Heralded entanglement between solid-state qubits separated by 3 meters
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• High-fidelity projective readout of a solid-state spin quantum register
• Generation of Nonclassical Photon Pairs for Scalable Quantum Communication with Atomic Ensembles
• Realization of a multi-node quantum network of remote solid-state qubits
• Experimental demonstration of memory-enhanced quantum communication
• Qubit teleportation between non-neighboring nodes in a quantum network
• High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
• Spin-resolved quantum-dot resonance fluorescence
• Quantum networks based on color centers in diamond
• Electrical and optical control of single spins integrated in scalable semiconductor devices
• Integrated quantum photonics with silicon carbide: challenges and prospects
• Robust multi-qubit quantum network node with integrated error detection
• Entanglement and control of single quantum memories in isotopically engineered silicon carbide
• Nanofabricated and integrated colour centres in silicon carbide with high-coherence spin-optical properties
• Purcell enhancement of a single silicon carbide color center with coherent spin control
• Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
• Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
• Resonant optical spin initialization and readout of single silicon vacancies in 4H-SiC
• Sequential generation of multiphoton entanglement with a Rydberg superatom
• Entangling a Hole Spin with a Time-Bin Photon: A Waveguide Approach for Quantum Dot Sources of Multi-Photon Entanglement
• Cavity-Enhanced Atom-Photon Entanglement with Subsecond Lifetime

Cited by in corpus (10)

• Precise characterization of a silicon carbide waveguide fiber interface
• Laser writing and spin control of near infrared emitters in silicon carbide
• Cavity enhancement of V2 centers in 4H-SiC with a fiber-based Fabry-Pérot microcavity
• Quantum enhanced electric field mapping within semiconductor devices
• Fluorescence enhancement of single V2 centers in a 4H-SiC cavity antenna
• Remote Quantum Networks based on Quantum Memories
• Check-probe spectroscopy of lifetime-limited emitters in bulk-grown silicon carbide
• A Concise Primer on Solid-State Quantum Emitters
• Narrow magneto-optical transitions in Erbium implanted silicon carbide-on-insulator
• Spin-photon Qubits for Scalable Quantum Network