Spin-photon entanglement interfaces in silicon carbide defect centers

Abstract

Optically active spins in solid-state systems can be engineered to emit photons that are entangled with the spin in the solid. This allows for applications such as quantum communications, quantum key distribution, and distributed quantum computing. Recently, there has been a strong interest in silicon carbide defects, as they emit very close to the telecommunication wavelength, making them excellent candidates for long range quantum communications. In this work we develop explicit schemes for spin-photon entanglement in several SiC defects: the silicon monovacancy, the silicon divacancy, and the NV center in SiC. Distinct approaches are given for (i) single-photon and spin entanglement and (ii) the generation of long strings of entangled photons. The latter are known as cluster states and comprise a resource for measurement-based quantum information processing.

Published version

References in corpus (7)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Coherent control of single spins in silicon carbide at room temperature
• Isolated electron spins in silicon carbide with millisecond-coherence times
• A photonic cluster state machine gun
• Engineering near infrared single photon emitters in ultrapure silicon carbide
• Resonant addressing and manipulation of silicon vacancy qubits in silicon carbide
• Optically generated 2-dimensional photonic cluster state from coupled quantum dots